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ANNOTATED BIBLIOGRAPHY OF LITERATURE ON THE CONDITION OF QUEENSLAND STREAMS AND RIVERS Angela H. Arthington Centre for Catchment and In-stream Research, Griffith University Nathan Queensland 41 11 Report to the Water Resources Commission Brisbane, Queensland June 1992 TABLE OF CONTENTS 1.0 SCOPE AND METHODS 2.0 ANNOTATED BDBLIOGRAPHY 3.0 STREAM AND RIVER RESEARCH IN PROGRESS AND IN-STREAMRESEARCH 3.1 CENTRE FOR CATCHMENT 3.1.1 Stream Invertebrate Studies 3.1.2 Fish Community Studies 3.2 AUSTRALIAN FOR TROPICAL FRESHWATER RESEARCH 3.2.1 Project Outlines 3.2.2 Publications in Progress 4.0 ACKNOWLEDGMENTS 11.0 SCOPE AND METHODS The f i s t objective of this annotated bibliography is to provide the Water Resources Commission with a summary of what is known about the condition of Queensland streams and rivers, including physical habitat characteristics, riparian vegetation, infomation on fish, algae, aquatic plants and invertebrates, water quality, and impacts of land use, flow regulation, other disturbances and introduced biota. Section 2 of the bibliography provides the usual details of the publication and an abstract for each published item, thesis or technical report. Where the original sighted item has lacked an abstract, a brief summary has been written. In some cases, the original item has not become available during the time available and no abstract is provided. Literature of a strictly taxonomic nature is generally not included. A bibliography of major taxonomic publications concerning the freshwater systems of the Brisbane region is provided in Arthington, Griffiths and Hailstone (1990). The second objective of this bibliography is to provide the Water Resources Commission with a summary of research papers in press and research projects in progress within the Centre for Catchment and In-stream Research, Griffith University, Brisbane and the Australian Centre for Tropical Freshwater Research, James Cook University, Townsville. Papers in press, in review and in progress related to stream condition are included in Section 3 of the bibliography. Other studies in progress within state agencies have not been included at this time, but may include various investigations underway in relation to the Queensland Integrated Catchment Management Strategy (e.g. the Johnstone River Pilot Study and the QDPI Review of the Downstream Effects of Agriculture). These are not readily accessible at this time but could be added to a regularly updated version of the bibliography. The majority of the information included in the annotated bibliography was accessed through STREAMLINE, which was searched by stream or river name and subject area. Other data bases which do not source information by river name could not be searched within the time frame of this project. It is considered unlikely that major ecological studies of Queensland streams and rivers have been overlooked but internal reports and environmental impact studies not entered into STREAMLINE will have been missed. Further investigation of these sources may be warranted but should await comment on the coverage of this bibliography. 2 . 0 ANNOTATED BIBLIOGRAPHY Allen, G. R. and D. F. Hoese (1980). A collection of fishes from the Jardine River, Cape York Peninsula, Australia. Journal of the Roval Societv of Western Australia 63: 53-62. Abstract Collections of freshwater fishes were obtained by the authors from the Jardine River at the northern tip of Cape York Peninsula on two expeditions during 1978 and 1979. An annotated checklist is presented which includes 30 species belonging to 24 genera and 16 families. The fish fauna of the Jardine River is most similar to that of the central coastal plain of southern New Guinea; at least 63% of the Jardine River fishes occur in the latter region. In addition, a similarity exists between the fish faunas of the Jardine River and Arnhem Land, Northern Temtory . The zoogeographic relationships of these faunas are discussed in detail. Arthington, A. H. (1984). Biological resources of urban creeks. Bulletin of the Australian Society for Limnology 11: 6-10. Abstract Most Australian cities have developed along large rivers that are fed by a network of small creeks draining through urban and suburban areas. The plant and animal communities associated with urban creeks offer a variety of resources which can enrich human life. The diversity of plant communities, their associated terrestrial fauna, and the diversity of aquatic invertebrates and fish in the Brisbane region are described and the scientific, educational and recreational values of these resources are discussed. Some of the effects on Brisbane's creek communities of alterations to creek hydrology, urban development, water pollution and the establishment of introduced plant and fish are described. An example of the management problems arising from competing uses of urban creeks highlights the type of difficulty facing management authorities. Management strategies are needed to evaluate aquatic resources and to set management constraints and priorities at the level of Local and State governments. Arthington, A. H. (1989). Diet of Gambusia affinis holbrooki, Xiphophorus helleri, X . maculatus and P. reticulata (Pisces: Poeciliidae) in streams of southeastern Queensland, Australia. Asian Fisheries Science 2: 192-212. Abstract The diets of four introduced Poeciliidae, Gambusia affinis holbrooki, Xiphophorus helleri, X maculatus and Poecilia reticulata, were studied in subtropical streams, southeastern Queensland. The prey of greatest importance in G. affinis diets was usually of terrestrial origin, i.e. ants and adult nematoceran Diptera, but aquatic Hemiptera and other aquatic taxa were also important in some habitats. G. aninis ate invertebrate prey that were small relative to body size and mouth gape (mean prey width 0.3 x mouth gape, mean prey length 1.28 x mouth gape) and relative to the size range of prey present (mean prey ingested = 0.597 x mean length and 0.702 x mean width of available prey in the environment equal to or smaller than the largest prey eaten). X helleri was omnivorous, consuming aquatic plant tissue, filamentous and other algae and aquatic and terrestrial invertebrates. X maculatus consumed Crustacea and aquatic and terrestrial insects, with dominance of the atyid shrimp, Caridina. P. reticulata had a more diverse diet composed largely of terrestrial insects, particularly ants; chironomid larvae were the dominant aquatic taxon eaten. The four species of poeciliids had significantly different mean diet composition. The implications of poeciliid feeding for sympatric endemic fishes are discussed. Arthington, A. H. (1990a). The biological environment of the Brisbane River: past, present and future. In: The ~ 3 s b a n eRiver Book: A Source Book fo; the Future (Eds P. Davie, E. Stock and D. Low Choy). Australian Littoral Society Inc. and Queensland Museum, Brisbane, Queensland. pp. 73-82. Abstract The Brisbane River Conference documented the impacts of land clearing, urban growth and commercial development on the biological resources of the Brisbane River. This paper reviews the more important features of change that have affected the river and its biological communities since European settlement, followed by a summary of information on the diversity of the river's plant and animal communities and of the major ecological processes operating within terrestrial, riparian and aquatic ecosystems. The third theme of the paper is the future of the river's biological resources and the need for the conservation, management and enhancement of importance resources, preferably in a total catchment and river ecosystem framework. The paper demonstrates that the biological and ecological knowledge base for planning and management of the Brisbane River is inadequate. To address key issues affecting the future of the river's biota will require a sustained, long-term research effort involving many disciplines and research groups. Arthington, A. H. (1990b). Latitudinal gradients in insect species richness of Australian lotic systems: a selective review. Tropical Freshwater Biology 2: 179-195. Abstract Recent comparisons of macroinvertebrate species richness in eastern Australian lotic systems suggest that tropical lotic communities may be more diverse or not noticeably less rich than temperate communities. The objectives of this paper are to review eastern Australian studies on lotic insect community diversity taking into account differences between studies which clearly influenced the reported estimates of species richness, including the physical characteristics of the river systems and reaches studied, the degree of disturbance or pollution of the study areas, and the sampling methods and intensity used to examine the lotic fauna. This review provides preliminary evidence of higher species richness of aquatic insects in some sub-tropical and temperate streams than in the tropics; this pattern is demonstrated in the insect fauna of both coarse and fine stream substrates. These uncommon latitudinal gradients seem to contrast with Rapoport's rule presented recently as a parallel pattern to, and as a possible phenomenon explaining, higher biotic diversity in many tropical assemblages. This paper argues that Rapoport's rule has overlooked the importance of latitudinal patterns in the variability and predictability of stream discharge regimes, and related environmental attributes, as factors in the maintenance of lotic insect assemblages. Some effects of stream discharge regime on Australian lotic insect communities support this contention. Arthington, A. H. (1991). The ecological and genetic impacts of introduced freshwater fishes in Australia. Canadian Journal of Fisheries and Aauatic Science 48 (Suppl. 1): 33-44. Abstract The inland waters of Australia have been colonized successfully by 20 species of freshwater fishes introduced to the continent, including 6 poeciliids, 3 salmonids, 4 cyprinids, 5 cichlids, 1 percid and 1 cobitid, all of which reproduce in the wild. The ecological and genetic consequences of fish introductions and translocations have concerned scientists and water authorities since the late 1960's, although the earliest introductions of salmonids for sport were made towards the end of the 19th century. Impacts of introduced fishes, including hybridization problems, habitat and water quality alterations, competition for space and food, predation and the introduction of exotic parasites and diseases are reviewed. Emphasis is placed on sub-tropical and tropical species, since they presently appear to present the greatest threat to natural ecosystems. Problems in the translocation of indigenous Australian fishes between drainage systems to supplement recreational fishing are noted. A review of the Lake Eacham rainbowfish, supposedly brought close to extinction in its natural habitat by translocated Australian piscivores, demonstrates that unanticipated predatorprey interactions may result from the thoughtless addition of piscivores to an endemic community. A theoretical perspective on the assessment of candidate species for introduction and translocation is given, and areas of theoretical ecology that may assist in predicting future impacts of introduced species are discussed. Arthington, A. H. (1992a). An holistic approach to water allocation to maintain the environmental values of Australian streams and rivers: A case history. In: Proceedings of Conference on Conservation and Management of Tropical Inland Waters: Problems. Solutions and Prospects. (Eds D. Dudgeon and P. Lam) Mitteilung, Societas Internationale Limnologie. Abstract This paper describes the key features of an holistic approach for assessing the environmental flow requirements of riverine ecosystems, based on the natural hydrological regime of the river and the specific ecological features that should be retained, protected or perhaps modified and which therefore require a water allocation. The paper then describes the first attempt to apply the holistic approach in a sub-tropical stream, Barker-Barambah Creek, southeastern Queensland, recently impounded by the Bjelke-Petersen Dam to provide a reliable water supply largely for irrigation purposes. The paper concludes with comments on the need for new directions in the overall field of water allocation for the environment, and the development of sustainable and environmentally sound management of riverine ecosystems. Arthington, A. H. (1992b). Diets and trophic guild structure of freshwater fishes in Brisbane streams. Proceedings of the Royal Societv of Oueensland 101 (in press). Abstract This paper describes the diets of six common and five other endemic fish species from streams of the Brisbane region, south-eastem Queensland. The dominant trophic guild in these streams is comprised of insectivorous carnivores, including at least three species of Eleotridae and Ambassis nigripinnis. Several species for which there is less information may also belong in this guild (Retropinna semoni, Pseudomugil signifer, and possibly, Glossamia aprion and juvenile Tandanus tandanus). There is an omnivorous guild, including Melanotaenia duboulayi, Craterocephalus stercusmurcarum and A. marianu, and two species of Anguilla can be placed in a piscivorous carnivore guild. The ordination of dietary data by detrended correspondence analysis (DECORANA) suggested considerable dietary overlap among most species during a time of year (March to May) when instream food resources may be limited compared to earlier summer months. The significance of dietary overlap and the high incidence of use of terrestrial food resources are discussed in the context of the relatively unpredictable environment of Australian sub-tropical streams, where a degree of trophic plasticity may be particularly advantageous for stream fishes. Arthington, A. H. and D. R. Bluhdom (1992). Distribution, genetics, ecology and status of the introduced cichlid, Oreochromis mossambicus, in Australia. In: Proceedings of Conference on Conservation and Management of Tropical Inland Waters: Problems. Solutions and Prospects. (Eds D. Dudgeon and P. Lam). Mitteilung, Societas Intemationale Limnologie. Abstract The African cichlid, Oreochromis mossambicus (Peters), has established breeding populations in a variety of waterbodies in Queensland and in one Western Australian river system. The origin of all stocks is the aquarium trade. This paper reviews the distribution, genetic differentiation, somatic characteristics and ecological relationships of 0. mossambicus in Australia and the evidence of adverse ecological effects in terms of competition for food and space, predation, and the importation of parasites and diseases. We also discuss the implications of there being two different genetic strains of tilapia in Australia, one relatively pure form of 0. mossambicus and one based on this species but with hybrid introgression from one or more of 0. niloticus, 0. hornorum and 0. aureus. The paper describes Federal and State legal and informal prohibitions on the importation and translocation of tilapias, existing management policies and practices, and options for the management of tilapias in different habitats and circumstances. Finally, we examine the ways in which research directed towards understanding the ecology of 0. mossambicur in Australia could be of benefit to other countries as well as to the needs of Australian management agencies. Arthington, A. H, S. E. Bunn and M. Gray (1992). Tully-Millstream Hydroelecmc Scheme. Additional Limnologial Studies. Final Report to the Queensland Electricity Commission. 196 pp., plus Appendices. Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. Abstract This report presents the results of a range of lirnnological investigations carried out to provide an ecological basis for recommendations on the downstream flows required to maintain the environmental values of streams within the Tully Millstream Hydroelectric Scheme in north Queensland. It includes information on stream hydrology, physical habitat, water quality, invertebrate communities, the fish fauna and reproductive cycles in relation to the flow regime, and a review of the in-stream water quality, habitat and flow requirements of fishes. The report concludes with a series of recommendations on alternative strategies for providing water to maintain the aquatic ecosystem of each sub-catchment. Arthington, A. H., B. M. Bycroft and D. L. Conrick (1992). Environmental Study of Barker-Barambah Creek: Volume 1: Executive Summary. Water Resources Commission, Brisbane and Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. 35 pp. Abstract This Study was commissioned to examine effects of the Bjelke-Petersen Dam and the associated Barker-Barambah Irrigation Project on the natural environment. The study began in 1987, with the following objectives: (a) to obtain -a baseline assessment of the pre-impoundment hydrologic regime, physical habitat characteristics, water quality, fish, invertebrate and aquatic plant communities of Barker-Barambah Creek, (b) to develop a water allocation strategy to protect the water quality and in-stream values of the creek, and (c) to assist in the development of operational strategies for this and other imgation projects to minirnise adverse environmental effects. This report presents an overview of the study and describes the water allocation strategy. Arthington, A.H. and C.P. Catterall (1989). Brisbane Waterways Management Study: Ecological Issues in Waterway Management. Report for the Brisbane Wetlands Management Study, Brisbane City Council. Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. 34 pp. Abstract Ecological issues of significance to the management of waterways are reviewed, including the importance of riparian vegetation and biological instream resources. The report also provides an assessment of significant waterways for conservation in the Brisbane region. Arthington, A. H., D. L. Conrick and B. M. Bycroft (1992). Environmental Study of Barker-Bararnbah Creek: Volume 2: Scientific Report: Water Quality, Ecology and Water Allocation Strategy. Water Resources Commission, Brisbane and Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. 400 pp. Abstract This Study was commissioned to examine effects of the Bjelke-Petersen Dam and the associated Barker-Barambah Irrigation Project on the natural environment. The study began in 1987, with the objectives described above. This report presents all results arising from the study (17 chapters) and a final chapter which integrates information from various chapters into a recommended water allocation strategy for Barambah Creek. The study demonstrates that maintenance of imgation water quality, fish habitat and spawning requirements, invertebrates and aquatic macrophyte communities may require controlled supplementary water releases from the Bjelke-Petersen Dam. Three levels of stream discharge have been recommended to describe the boundary conditions of the water allocation strategy; flushing flow requirements are also described. Since large releases of water from September to November, or fluctuating water levels, could affect fish spawning and survival of eggs and fry, the water allocation strategy recommends that daily water level variations during critical spawning periods should not be allowed to exceed the natural changes that occur over the historic range of flow conditions in each month at particular sites. The study demonstrates that the management of streams must be undertaken within the framework of Integrated Catchment Management in order to address the range of water quality and in-stream issues comprehensively. Arthington, A. H., D. L. Conrick and B. M. Bycroft (1992b). Environmental Study of Barker-Barambah Creek: Volume 3: Appendicies to Scientific Report. Water Resources Commission, Brisbane and Centre for Catchment and Instream Research, Griffith University, Brisbane, Queensland. 100 pp. Abstract This Study was commissioned to examine effects of the Bjelke-Petersen Dam and the associated Barker-Barambah Irrigation Project on the natural environment. The Appendices present additional essential details on the findings of the study, basic calculations for certain analyses, and further information on the methodology used to assess the in-stream flow requirements of stream fishes (questionnaires, compilation of habitat preference data and the RHYHABSIM Computer Manual). Arthington, A. H., D. L. Conrick, D. W. Connell and P. M. Outridge (1982). The Ecology of a Polluted Urban Creek. Australian Water Resources Council Technical Paper No. 68. Australian Government Publishing Service, Canberra. Abstract Sewage systems servicing urban and light industrial areas may receive organic wastes and a variety of toxic substances in low concentrations. Treatment substantially reduces the BOD and converts organic nitrogen, phosphorus and sulphur into oxidised salts. Chlorine is used as a sterilising agent in the final effluent. Treated sewage effluents discharged into urban streams may therefore contain toxic substances as well as organic materials. This report describes the effects of such an effluent on the physical, chemical and biological properties of an urban creek in metropolitan Brisbane, Queensland, Bulimba Creek. The report then evaluates physico-chemical and biological methods of detecting and assessing sewage effluent contamination in streams. Evaluation of published toxicity and bioassay data indicated that the combined effects of dissolved oxygen deficiency, residual chlorine and metals, acting at lethal and sublethal levels, were likely to have had detrimental effects on invertebrates at all sites downstream of the effluent outfall, but particularly immediately below it. A total of 240 invertebrate species was collected from Bulimba Creek during the study. The Phyla present were Cnidaria (one species), Platyhelminthes (probably five species), Nematoda (number of species not known), Mollusca (12 species), Annelida (nine species) and Arthropoda (Arachnida 2 species, Crustacea 14 species and Insecta 197 species). Arthington, A. H., D. L. Conrick and G.W. Yeates (1986). Nematodes, including a new record of Tobrilus diversipapillatus in Australia, as potential indicators e Freshwater of sewage effluent pollution. Australian Journal of ~ a r i h and Research 37: 159-166. Abstract Nine nematode taxa were collected during a study of the effects of sewage effluent on benthic macroinvertebrates in Bulimba Creek, Brisbane. The nematode, Tobrilus diversipapillatus, previously unknown from Australia, comprised 80% of the collection, and was most abundant at polluted sites with high biological oxygen demand and high levels of total organic carbon. Free-living adult and juvenile Mermithidae made up 15.6% of the collection and were most abundant at sites with low biological oxygen demand. The potential of T. diversipapillatus and Mermithidae to serve as biological indicators of organic enrichment and toxic pollution is discussed in terms of these preliminary findings and literature data. Arthington, A. H., M. W. Griffiths and T. S. Hailstone (1990). Freshwater flora and invertebrate fauna of the catchment. In: The Brisbane River: A Source Book for the Future. (Eds P. Davie, E. Stock and D. Low Choy). Australian Littoral Society Inc. and Queensland Museum, Brisbane, Queensland. pp. 103-130. Abstract This paper has three main themes: aquatic plants and riparian vegetation, aquatic invertebrates, and the integrated management of catchments and the aquatic systems they support. Firstly, it lists the freshwater plants and macroalgae known from the Brisbane River catchment, reviews ecological studies on aquatic plants and comments on areas where further research and management investigations are most necessary. It also outlines the critical research and management issues relating to riparian vegetation, and to the ecological links between terrestrial and aquatic ecosystems. It updates and earlier list of the freshwater invertebrates collected from the Brisbane River catchment and develops a major theme discussed during the 1977 symposium - the commercial, scientific, educational and practical importance of studies on aquatic invertebrates. The concept of integrated catchment management and recent developments in its application in the Brisbane River catchment are discussed. Arthington, A.H., S. Hamlet and D.R. Bluhdorn. The role of habitat disturbance in the establishment of introduced warrn-water fishes in Australia. In: Introduced and Translocated Fishes and their Ecological Effects (Ed. D. A. Pollard). Bureau of Rural Resources Proceedings No. 8. Australian Govt. Pub. Service, Canberra. pp. 61-66. Abstract The types of disturbance recorded in Australian streams supporting introduced warm-water fishes are reviewed and it is demonstrated that habitat disturbance may contribute to the success of invading species such as Oreochromis mossambicur and Gambusia holbrooki. Implications for better management of streams and other waterbodies and of the problem of introduced fishes are discussed. Arthington, A. H. and E. J. Hegerl (1988). The distribution, conservation status and management problems of Queensland's athalassic and tidal wetlands. In: The Conservation of Australian Wetlands. (Eds A. J. McComb and P. S. Lake). Surrey Beatty and Sons, Sydney. pp. 59-101. Abstract This chapter presents an overview of Queensland's inland and tidal wetlands and an appraisal of deficiencies in knowledge of the wetland resources of the state. With the possible exception of mangrove wetlands, the sum total of knowledge permits little more than an inventory of wetland types and their distribution within 13 biogeographic regions. From this basis, and a review of the conservation status of wetlands, it is possible to present a case for the conservation of additional representative wetlands within each biogeographic region, as Sattler has done for the terrestrial plant communities of Queensland (Presidential Address to the royal Society of Queensland, April, 1986). Queensland's athalassic and saline wetlands have been altered in many ways by European settlement and development, particularly in populated coastal areas where demand for agricultural and urban dryland is high. In this review a wetland inventory and literature review is presented, but further work is needed to identify critical areas of high conservation value before they are lost or irreparably altered. Arthington, A. H., J. M. King, J. H. O'Keeffe, S. E. Bunn, J. A. Day, B. J. Pusey, D. R. Bluhdorn and R. Tharme. Development of an holistic approach for assessing environmental flow requirements of riverine ecosystems. Proceedings of an International Seminar and Workshop on Water Allocation for the Environment. Centre for Water Policy Research, Armidale, New South Wales. pp. 69-76. Abstract The paper describes key features of an holistic approach for assessing the environmental flow requirements of the en tire riverine ecosystem, based on the natural hydrological regime of the river, and the specific ecological features that should be retained, protected or perhaps modified and which therefore require a water allocation. The annual water needs of a riverine ecosystem would be the sum of the low flow requirements throughout the year, the additional wet-season flows and floods and the requirements for flushing flows to achieve particular objectives which are not likely to be achieved by the basic water provisions. The total water requirements of the riverine ecosystem would ultimately be defined in terms of monthly flow allocations, and monthly maximum and minimum flows, desirable levels of flow variability and the timing and duration of floods and flushing flows. The paper concludes with several observations on the need for new directions in the overall field of water allocation for the environment, and the development of sustainable and environmentally sound management of riverine ecosystems over the long term. Arthington, A. H., R. J. McKay, D. J. Russell and D. A. Milton (1984). Occurrence of the introduced cichlid, Oreochromis mossambicus (Peters) in Queensland. Australian Journal of Marine and Freshwater Research 35: 267272. Abstract The Mozambique mouthbrooder, 0. mossambicus, has established selfmaintaining populations in two water-supply reservoirs in Brisbane, southeastern Queensland, and in ornamental ponds and a man-made drainage system in Townsville, northern Queensland. It has bred in standing freshwater systems and in tidally flushed drains. An attempt to eradicate 0. mossambicus from ornamental ponds in Townsville in 1980 was unsuccessful. The species has also been recorded from the Gascoyne River, Carnarvon, Western Australia. Arthington, A. H. and D. A. Milton (1986). Reproductive biology, growth and age composition of the introduced Oreochromis mossambicus CCichlidae) in two reservoirs, Brisbane, Australia. Journal of the ~nvironmental~ i o l o ~ofv Fishes 16: 257-266. Abstract The reproductive biology, growth and age composition of Oreochromis rnossambicus (Peters) were studied in two Brisbane reservoirs during 19811983. The life history was assessed in terms of altrical and precocial tendencies after Noakes and Balon (1982). Fish from both reservoirs had a precocial life history style, showing delayed maturation at 12-15 months, at minimum sizes of 152mm standard length in males and 174mm standard length in females. The minimum size of fish at maturity was 0.51-0.73 of maximum size. Mean fecundity was 1360 (+I 17.2 standard error) in North Pine Dam and 2107 (k220.4 standard error) in Tingalpa Reservoir. This difference was significant ( ~ ~ 01).. 0 Oocyte diameter ranged from 1.72.6mrn. Overall sex ratio was 1:l but males predominated amongst Ash than 200mm standard length. Stocks consisted mainly of three age groups and the oldest fish caught were 3+ years old. Growth rates were high in both populations. Length-weight relationships conformed to the allomemcformula W = aL" and were consistent with data on growth rates. High growth rates are attributed to the high productivity of both reservoirs and the small size of the populations relative to food resources, which are not utilized directly by other fishes. These factors probably also account for the precocial life history style exhibited, compared to the altricial history style of 0. mossambicus in Lake Sibaya, South Africa, a food-restricted environment. Arthington, A. H., D. A. Milton and R. J. McKay (1983). Effects of urban development and habitat alterations on the distribution and abundance of native and exotic freshwater fish in the Brisbane region, Queensland. Australian Journal of Ecology 8: 87-101. Abstract The distribution of freshwater fish in creeks throughout the Brisbane region was determined by a survey carried out in 1977-78. Seventeen native and six exotic species were recorded in 55 creeks. Sixteen exotic species were recorded in 55 creeks. Sixteen native and four exotic species were collected in a more restricted survey of central Brisbane in 19481. Urban development and the establishment of exotic plants have resulted in substantial changes to the aquatic environment in many of the creeks surveyed. Exotic grasses, especially para grass (Brachiaria mutica) have reduced the extent of free water by growing partly into stream reaches. Native aquatic macrophytes have declined, apparently due to dredging, siltation and other disturbances. These changes have affected the distibution and abundance of native and exotic fish. Native species with preference for open water and beds of aquatic plants have declined in creeks overgrown by para grass and floating plants. Melanotaenia fluviatilis, Retropinna semoni, Pseudomugil signifer, Craterocephalus stercusmuscarum and Ambassis nigripinnis have been affected. Para grass and floating plants have not affected the range of abundance of Hypseleotris galii, H. compressus and Mogurnda adspersa. Gambusia affnis andXiphophorus helleri have been advantaged by expansion of their preferred habitat type - the edges of pools were exotic grasses have grown partly into the water. The effect of exotic fish on native species is unclear. There was a correlation between large number of G. afJinis and small numbers of H. galii and M. fluviatilis. Correlations could result from predatory or competitive interactions between species. Alternatively, correlations could be due entirely to the effects of habitat alterations on exotic and native species. However, H. galii was evidently not disadvantaged by the habitat alterations studied. Thus there may be a complex interaction between this species and G. affinis. There was no evidence that X. helleri had affected the range or abundance of native species. Arthington, A. H. and I. Pullar (1990). Barker-Barambah Irrigation Project: a case study in integrated management of a catchment-aquatic ecosystem. Proceedings of the 17th Conference of the International Committee on Larec Dams IICOLD). pp. 78 1-803. Abstract The Queensland Government has recently completed the construction of an Irrigation Project where impounded water will be used to irrigate alluvial flats along Barambah Creek in the South Burnett region of south-eastern Queensland. Impounded water will replace an inadequate groundwater supply which can be temporally and spatially of poor quality. The impoundment will intercept down valley flow of groundwater as well as effluent from an upstream coal power station. An environmental study of the catchment and aquatic ecosystem began in 1987 to obtain a baseline assessment of the preimpoundment hydrologic regime, physical habitat characteristics, water quality, fish, invertebrate and aquatic plant communities of Barker-Barambah Creek and to assist in developing operational strategies for this and other irrigation projects to minimise adverse environmental effects. This paper presents selected pre-impoundment results and demonstrates that maintenance of imgation water quality, fish reproductive patterns and balanced aquatic macrophyte communities may require controlled supplementary water releases from the Bjelke-Petersen Dam. Future studies will define an environmental release strategy and monitor its subsequent in-stream effects. Australian Environment Council (1989). Acid rain in Australia: a national assessment. Australian Environment Council Report 25. AEC, Canberra, ACT. Abstract Acid rain has not been perceived as a problem in Australia as it has been in the northern hemisphere for two reasons: (i) the emission of acid rain percursors to air is relatively small compared to the northern hemisphere countries and, (ii) Australia is geographically isolated from heavily industrialized countries, which ensures that long range transport of emissions is not problematic. In some European countries acid depositions come from neighbouring countries rather than locally. Not many extensive studies on rainfall acidity have been conducted in Australia. The evidence suggests it is not a national problem, but there are regions which warrant investigation. These are the Kalgoorlie region of Western Australia, Mount Isa in Queensland and the Latrobe Valley of Victoria. Regions susceptible to soil acidification include the eastern parts of the Great Dividing Range in northern Queensland and sections of Kakadu National Park. Techniques for minimizing acid percursor emissions are identified. Benson, L. J. (1983). Drift and Recolonization in a North Queensland Tropical Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. Abstract A study conducted in Yuccabine Creek, a rainforest stream in tropical north Queensland, traced the benthic recolonization process following the breaking of an unusual drought by heavy autumn rain. A rapid recovery of taxonomic composition was attributed to survivors in pools and moist microenvironments under stones, and the immigration of flying adults from nearby streams which did not cease to flow during the drought. A much slower recovery in the density of benthic animals was linked to sporadic spates during the f i s t three months of stream flow, the onset of winter and depressed food reserves. The use of implanted-substrate trays showed drift was the primary dispersal mechanism of larval colonists, particularly during the early stages of recolonization. The majority of insect taxa in Yuccabine Creek showed nocturnal drift maxima with a peak immediately following sunset, a result which concurs with studies from both tropical and temperate latitudes. Benson, L. J. and R. G. Pearson (1987a). Drift and upstream movement in a 3: 225Yuccabine Creek, an Australian tropical stream. ~ ; d r o b i o l o ~ i 15 239. Abstract Drift and upstream movement were monitored over 14 months in a seasonal upland tropical stream in northeastern Australia. There were distinct seasonal pulses in the drift with variable peak levels in the summer wet season and low more stable levels during the dry season. Drift density ranged from 0.36 to 3.98 animals per m3 (monthly mean = 1.26). There was no correlation between drift density and either benthic density or stream discharge. In the absence of catastrophic drift, drift was dispersive, not depletive in the wet season. A total of 121 taxa was caught in the 14 drift samples. Most taxa had nocturnal maximum drift levels with a peak immediately after sunset, a pattern apparently related to level of light and not temperature. Compensation for drift by upstream-moving nymphs and larvae was least during the wet season and increased during the dry season to a peak of 27% by numbers. Mean compensation was 8.2%. It is suggested that apart from the wet season when an animal may drift substantial distances, most riffle animals will spend their larval lives in one small stretch of stream. Benson, L. J. and R. G . Pearson (1987b). The role of drift and effect of season on macroinvertebrate colonization of implanted substrata in a tropical Australian stream. Freshwater Biology 18: 109-116. Abstract Experiments using implanted substrata were conducted in Yuccabine Creek Queensland , an upland stream which exhibits a strong seasonal pattern of discharge and temperature. The implanted substrata were either set in the stream bed or were raised in the water column. Three experiments were run, at different times of the year. Colonization rate was dependent on benthic abundance, mobility of the fauna and distribution of resources. The rates on embedded trays were similar in the late wet season and mid dry season, but colonization rate in the late dry season was greater. Drift alone could have accounted for all colonization in the late wet season, 63% of colonization in the mid dry season and less (unmeasured) in the late dry season. Drift acts to disperse early instars to patches of suitable habitat after the summer wetseason peak in reproduction. Following the wet season, stream discharge decreases, benthic abundance increases, resources become more concentrated and movements of animals in contact with the substratum play an increasingly important role in colonization. Benson, L. J. and R. G . Pearson (1988). Diversity and seasonality of adult Trichoptera captured in a light-trap at Yuccabine Creek, a tropical Australian rainforest stream. Australian Joumal of Ecologv 13: 337-344. Abstract Seventeen light-trap samples were taken over a 20 month period at Yuccabine Creek, an upland rainforest stream in north-eastem Queensland. Seventyeight species of Trichoptera were recorded from a total catch of 6431 individuals. The fauna was dominated by the Hydroptilidae (25 species and 5 131 individuals) and, though composed primarily of To~~esian genera, some Bassian elements were recorded. A seasonal pattern of change of abundance was observed with the majority of taxa exhibiting maxima between December and January (summer) and minima between July and September (winter). Beumer, J. P. (1979). Reproductive cycles of two Australian freshwater fishes: the spangled perch,Therapon unicolor Giinther 1859 and the East Queensland rainbowfish, Nematocentris slendida Peters 1866. Joumal of ~ i s hBiology 15: 111-134. Abstract The reproductive cycles of the spangled perch Therapon unicolor Gunther, 1989 and the East Queensland rainbowflsh Nematocentris splendida Peters, 1866 are described in terms of maturity stages, sex-ratio, gonosomatic indices, oocyte diameters and fecundity. T. unicolor has a well-defined reproductive cycle with gonad development stimulated by rising temperatures and increasing daylength; with spawning induced by the 'wet', possibly by rising water levels and increasing turbidities. In contrast, N. splendida has a protracted spawning period with a peak of spawn!ng activity in pre-flood and flood periods, although individuals in spawning condition and juveniles may be found throughout the year. Beumer, J. P. (1980). Hydrology and fish diversity of a North Queensland tropical stream. Australian Joumal of Ecology 5: 159-186. Abstract The diversity and distribution of fish and the hydrology of the Black-Alice River System, North Queensland, are described from a 2-year study (September 1972 to August 1974). Most physico-chemical parameters measured exhibited seasonal patterns which are influenced by rainfall and discharge. A total of forty-one species of fishes belonging to four groups: freshwater tolerant, saltwater tolerant, diadromous and sporadic, were recorded during the study. The diversity of fish species decreased with increasing distance from the mouth of the system. Fluctuations in total diversity (H') were due to variations in 'species richness' (D) rather than to equitability (E). The ability of the fish community to 'recover' its diversity and longitudinal distribution after a flood of above-average magnitude is demonstrated. Blackman, J. G. and D. K. Locke (1985). Quantitative analysis of seasonal wetlands in the Burdekin-Townsville region with special reference to waterbird habitat. Ecologv of the Wet-drv tropics: Proceedings of a Joint Svm~osium.(Eds M.G.Ridpath and L.K. Corbett). Ecological Society of Australia and the Australian Mammal Society, Melbourne, Victoria. pp. 139152. Abstract Vegetation and other wetland components of seasonally adapted wetlands can be precisely mapped from low level aerial photography. Measurements of the individual components' area and position within the wetland have been indexed. These indices can be used to assess the persistence of components within the wetland habitat at sequential time periods. This persistence concept has three applications: (i) in establishing the nature and variation of succession and persistence of components in a wetland, (ii) in evaluating the persistence of those components which determine waterfowl carrying-capacity of a wetland, and (iii) in monitoring seasonal and longer term changes in wetlands. The above indices are used to examine the persistence of waterfowl plant food species which occurred at one swamp over a 10 year period. There is an apparent relationship between the persistence of these and the numbers of waterfowl which used the swamp. Present work is concerned with habitat utilization of coastal sedge swamps by regional populations of brolgas Grus rubicundus (Perry). One aspect of this work is the use of persistence indices to examine and subsequently model seasonal and annual persistence of components in these swamps. The data for this are being derived from repetitive mapping of wetland components along fixed transects across coastal swamps. Bluhdom, D. R. and A. H. Arthington (1990a). Somatic characteristics of an Australian population of Oreochromis mossambicus Peters (Pisces: Cichlidae). Journal of the Environmental Biologv of Fishes 29: 277-29 1. Abstract TheOreochromis mossambicus population of North Pine Dam, Brisbane, Queensland, Australia was studied over three years, from 1985 to 1988. Basic somatic data were obtained and characteristic values of condition factor, sex ratio, gonosomatic index and the relationships between total and standard lengths, and length and weight, were calculated. Standard length is proportional to total length by the formula SL= - 0.321 + 0.799 TL.Weight is related to length by the isometric formula W = a ~ 3 .Condition factor values spanned the range 0.0254 to 0.0563, with an average of 0.04078 for males and 0.03877 for females. The sex ratio is 1: 1 until maturity is reached (21 cm SL), at which time the catch rate of the sexes varies due to divergent habitat selection behaviour. Average values of gonosomatic index, considered in relation to maturity classification, are similar to those obtained from other populations, however maximum values are generally much lower, at 0.47 for males and 3.62 for females. These characteristic values are compared, with varying degrees of concordance, with those for populations of this species in other countries. Bluhdom, D. R. and A. H. Arthington (1990b). The incidence of stunting in Australian populations of the introduced cichlid Oreochromis mossambicus (Peters). In: The Second Asian Fisheries Forum (Eds R. Hirano and I. Hanyu). Asian Fisheries Society, Manilla, Philippines. pp. 41-44. Abstract This study involved the electrophoretic and morphometric examination of six feral populations of Oreochromis mossambicus in Australia for indications of stunting. Gonosomatic index and condition factor values were calculated and evaluated, along with standard length, minimum and meansize at maturity, and sex ratio. Two of the six populations were considered to be stunted. The delineating values derived from the above data are considered in relation to the Australian populations and comparable populations in other countries. It is concluded that, 1: two populations, Guthries Pond and Western Australia, are stunted, 2: the stunted populations are not genetically different from associated non-stunted populations, 3: while each exhibited characteristics of a stunted population, it appears that the environmental issues being applied are of very different types, and 4: there are indications that, at Tingalpa Reservoir, the population is intermediate between stunted and non-stunted conditions. Bluhdorn, D. R., A. H. Arthington and P. B. Mather (1990~). The introduced cichlid, Oreochromis mossambicur, in Australia: a review of distribution, population genetics, ecology, management issues and research priorities. In: Introduced and Translocated Fishes and their Ecological Effects (Ed. D. A. Pollard). Bureau of Rural Resources Proceedings No. 8. Australian Government Publishing Service, Canberra, ACT. pp. 83-92. Abstract The introduced African cichlid, Oreochromis mossambicus (Peters), has established feral populations in a range of tropical and sub-tropical waterbodies in Australia. This paper describes the species' distribution in Queensland and Western Australia. Genetic differences between populations are discussed and evidence is presented that two basic stocks of Oreochromis mossambicur are involved; a hybrid in the Cairns area, and an almost pure stock in the remaining areas. Somatic characteristics of six populations are described, showing that two of these exhibit stunting, that is, reproduction at an unusually small body size. Information on the dietary ecology of 0 . mossambicus in North Pine Dam and Tingalpa Reservoir, Brisbane, shows that adult and sub-adult 0.mossambicus has a markedly different diet composition from the other two common large fish species in these impoundments. 0. mossambicus, Tandanus tandanus (eel-tailed catfish), and Leiopotherapon unicolor (spangled perch) partition the available food resources at both high and low water levels in these impoundments. The paper concludes with an overview of management issues arising from the presence of 0.mossambicus in Australia. A case is made for continuing to prohibit importation and translocation of this species as the single most significant action needed to prevent the widespread invasion of fresh and brackish water habitats. Research priorities are also outlined. Bretz, J. J. (1984). Watercourse Meander Spectra of the Logan and Albert Rivers. B.C.E. Thesis, Queensland Institute of Technology, Department of Civil Engineering, Brisbane, Queensland. 125 pp. Abstract The report outlines a project which uses the technique of spectral analysis to find meander wavelengths of the Logan and Albert Rivers. It discusses the introductory theory of meanders, considering such aspects as regular watercourse forms from total work, pools and riffles and comparison of a straight reach with a curved reach. Previous work is surveyed, including modelling meanders and artificial meander generation. Spectra were generated for the two rivers using the sine generated curve to approximate the in-plan shape of meanders. From the spectra obtained, dominant wavelengths were found and interpretations made. Bristow, J. (1985). Water quality changes with impoundment. Oueensland Division Technical Papers: Institution of Engineers 26: 29-35. Abstract This paper considers the specific rainfall and stream flow conditions in Queensland and their effects on water quality in streams and impoundments. It discusses the changes introduced by impoundment of water and cites specific data relating to various problems experienced in the operation and control of water treatment plants. The examples quoted show that there are definite water quality changes with impoundment but that it is difficult to postulate these with certainty due to rainfall intensities experienced from time to time. Bunn, S. E. (1991a). Response of stream invertebrates to extreme discharge events. 30th Australian Society for Limnoloev Congress: Promamme and Abstracts. Australian Society for Limnology, Caulfield East, Victoria. Abstract A preliminary study of the life history and behavioural responses of algal grazing invertebrates to physical disturbance was conducted in a small subtropical rainforest stream in south-east Queensland. Three relatively sedentary species of Trichoptera dominate the guild of grazers on stone surfaces in this stream; an undescribed species of Tasimia, Tmiagm ?ciliata (both Tasimiidae) and an undescribed species of A g a p e t u s (Glossosomatidae). These species comprise approximately 60%, 13% and 13% respectively of the individuals on cobble size stones. The lowest chlorophyll a concentrations on cobbles were recorded during the wet season but the decline in algal food resources occurred in the absence of disturbances from extreme discharge events. Such disturbances in the late wet season were, however, associated with a major decline in the density of grazers, particularly Tasimia, on cobbles. The subsequent recolonisation of grazers on cobbles post-disturbance was slow and correlated with an increase in chlorophyll a during the dry season. Qualitative sampling of boulder habitats demonstrated a disproportionately high number of Tasiagma ?ciliafa larvae (46% of the total individuals) than on cobbles and it appears that densities of this species were-not greatly reduced following high discharge events. Experiments are underway to determine if boulder habitats offer a refuge from discharge-related disturbances and to examine the influence of disturbance on interactions among these species of grazers. Bunn, S. E. (1991b). Streamflow patterns, disturbance and benthic invertebrate communities. In: Svm~osiumon Streamflow Regulation and Ecolo~ical Implications - Australia/South Africa ~ers~ectives. Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. Abstract There is little doubt that disturbance exerts a major influence on the structure and dynamics of natural communities and that it can account for a large portion of the observed spatial and temporal heterogenity. This appears to be particularly true for stream and river communities and disturbance is now considered by some stream ecologists to be the most important feature of steams to be studied. One of the more common natural disturbances can also result from periods of low stream discharge which lead to stranding and desiccation. Populations of stream invertebrates are greatly influenced by the intensity, frequency and predictability of these extreme discharge events. The latter is particularly important because this will influence the evolution of behavioural and life history strategies. A study of the responses of algal grazing invertebrates to discharge-related disturbance is underway in a small sub-tropical rainforest stream in south-east Queensland. Data from this study will be discussed together with additional information on the influence of the overall pattern of flow on benthic invertebrate communities in Australian streams. An understanding of the influence of the seasonality and predictability of stream flow and the associated disturbance regime on stream benthic communities is essential to the planning of water release strategies for flow-regulated rivers. Bunn, S. E. (1991~).The neglected inhabitants of our streams and rivers: aquatic invertebrates. In: Snippets. The Occasional Journal of CCISR. (Ed. D. Charles-Edwards). Centre for Catchment and In-stream Research, Griffith University, Brisbane, Queensland. Number 4: 17-25. Abstract With perhaps the exception of conspicuous and admired species such as butterflies and beetles, insects and arthropods in general are rarely considered worthy of inclusion in conservation and management programmes. This article discusses the importance and significance of aquatic invertebrates in terms of their contribution to world biodiversity, their conservations status, the taxonomic impedment to their analysis in ecological studies, and the regional and functional significance of invertebrates in aquatic ecosystems. It discusses the condition and fate of Australian streams and rivers and the role of biological monitoring in assessing and managing the condition of waterways. Bunn, S. E. and W. Boughton (1991). Ecological significance of streamflow patterns of some Australian rivers. Internationale Vereinigune fur Theoretische und An~ewandteLimnologie 24. Abstract The pattem of stream discharge is known to exert a major influence on the structure and functional organisation of stream benthic communities. In particular, discharge-related disturbance can be responsible not only for major variations in spatial and temporal patterns in community structure, but also have a major impact on productivity, nutrient spiralling and decomposition in streams. The east cost of mainland Australia extends from 100 to 400 S latitude. Discharge data from a range of river systems along the east coast, and from the south-west of Western Australia, were compared using Collwell's measures of time-series. This approach considers the overall predictability of discharge patterns, together with their contingency, which measures predictable fluctuations, and constancy. Streams in the far north of eastern Australia show pronounced seasonal variation in flow from the tropical wet summers and dry winters, and have a high predictability and contingency. Streams in south-western Australia also show pronounced seasonal variation but with wet winters and dry summers. The degree of seasonality of stream discharge diminishes, however, as we move down the east coast. Streams in the south-east are more uniform in flow throughout the year because of the temperate climate and some snowmelt and in fact, show the least seasonal discharge pattem. Most knowledge of the structure and functional organization of stream communities in Australia is based on studies conducted in the south-east. If stream discharge patterns are important in influencing benthic communities we should be careful not to make generalisations when this region is clearly atypical of most river systems in Australia. Cameron McNamara Pty Ltd (1985). Stream aggradation effects of soil erosion. Cameron McNamara Pty Ltd, Brisbane. Abstract This paper describes the erosion/aggradation processes that are occumng in the agricultural catchment of the South Johnstone River and the methodology adopted for measuring aggradation and its physical and quantified off-site economic consequences. The significance of farm erosion on river aggradation is discussed and the findings of a sedimentary study of collected sediment samples reported. Finally, on the basis of the findings of the project, the report recommends that the movement and deposition of sediment and the very high suspended beds in the South Johnstone River should be subject to a monitoring programme so that the appreciable silt content can be evaluated. This will assist the fate determination of catchment erosion and provide input to coastal studies connected with environmental conditions. Campbell, I. C. and T. J. Doeg (1989). Impact of timber harvesting and production on streams: a review. Australian Journal of Marine and Freshwater Research 40: 519-539. Abstract Timber harvesting operations have significant effects on both water quantity and water quality. The effects on water quantity have been well documented both in Australia and elsewhere. The effects on water quality are less widely appreciated, and include elevated concentrations of dissolved salts, suspended solids and nutrients, especially during peak flow periods. Several Australian studies have failed to measure peak flow transport of suspended solids, or have measured it inadequately, thus severely underestimating transport. The major short-term effects of timber harvesting on the aquatic biota result from increased sediment input into streams or increased light through damage to, or removal of, the riparian vegetation. Sediment which settles on, or penetrates into, the stream bed is of more concern than suspended sediment, and can lead to long-term deleterious changes to fish and invertebrate populations. Increased light causes an increase in stream primary production which may increase invertebrate densities, and alter community composition. These biological consequences have not yet been adequately investigated in Australia. Longer-term effects, as yet not investigated in Australia, include changes to stream structure as the regrowth forest has fewer large logs to fall into the stream. These large logs play a major role as habitat and retention structures in streams. There has been no attempt to evaluate the effects of timber production activities, including pesticide use and fuel reduction burning, on the Australian stream biota. Likewise, although buffer zones are widely advocated as a protection measure for streams in Australia, there have been no studies to evaluate their effectiveness. Chandler, C. (1985). The Australian Bass. Internal Report. Queensland Department of Primary Industries, Brisbane. Absmct This report presents information on the Australian Bass, the only freshwater sport fish of any consequence in southern Queensland: It establishes the distribution of the fish. The Bass is found in the freshwater reaches of coastal streams from the New South Wales border to the Noosa River and streams running into Tin Can Bay. Briefly discusses the biology and ecology, covering aspects such as growth rates, food items and breeding. Turbidity, temperature and salinity limitations are stated. Outlines measures needed to maintain bass populations, including the prevention of erosion, siltation, and pollution. Specific management steps legislated to protect the fish are listed. They involve the Noosa River system and Lake Cootharaba, and also relate to minimum catch sizes and commercial netting. Charlton, L. J. (1989). The Ecology of Dragonflies (Odonata) in a Tropical Australian Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. 88 pp. Abstract. An ecological study was conducted of the dragonfly (Anisoptera) and damselfly (Zygoptera) fauna of Birthday Creek, an upland, order-3 tropical rainforest stream in north eastern Queensland. A diverse fauna comprising 14 species, representing nine of the 16 odonate families in Australia, occurred within a 200m stretch constituting the study site. The Birthday Creek fauna was typified by stream dwelling odonate species restricted to north eastern Queensland and Cape York. Although the odonate fauna in each of the four major habitats (riffles, runs, leaf litter and sand) was comparatively diverse, odonate species demonstrated a distinct preference for either riffle or leaf litter by way of their relative abundance in these two habitats. Within the major habitats there was spatial separation of species in response to limitations imposed by environmental variables and morphological traits. Biotic interactions were probably most important between species occupying the same microhabitat. Results of the study indicated that a range of environmental variables and biotic interactions determined the spatial and temporal occurrence of odonates in Birthday Creek. Congdon, R. A. (1990). Two extremes of the Burdekin River system: from Birthday Creek the Banattas wetlands. 29th Australian Societv of Limnology Conmess: Promamme and Abstracts. Australian Society for Limnology, Caulfield East, Victoria. Abstract The Burdekin River system has its headwaters in wet tropical rainforests on the Great Dividing Range, but flows through much dner savanna woodlands to the enonnous Burdekin Dam, and thence to the coast. Water from the dam is diverted to the Burdekin River Inigation Scheme near the river's delta, where it drains into the wetlands of the Barrattas creeks. This paper summarizes studies underway in a rainforest catchment in the river's headwaters and in the Barrattas wetlands. These extremities of the Burdekin system show contrasting water quality, with important implications for management. Congdon, R. A. (1991). Effects of imgation discharge on the Barrattas wetlands. Report to the Land and Water Resources Research and Development Corporation, Canberra, ACT. Abstract Data on water quality were collected over 26 months from 11 sites within and downstream of the Burdekin Irrigation Area Queensland . At least some of the increased nutrient concentrations are likely to have resulted from inigation drainage. To reduce nutrient inputs and the likelihood of algal blooms in natural wetlands receiving irrigation drainage, it is suggested that an artificial wetland system be developed to act as a biological filter. Total catchment management, however, would be necessary to reduce the impact of nutrients and sediments on the coastal waters of the Great Barrier Reef. It is considered probable that the natural wetlands play an important role in absorbing some nutrients and accelerating sedimentation. Eichhornia and Salvinia were found in the wetlands, and it is recommended that their distribution be monitored, as they can clog imgation channels as well a degrading natural aquatic systems. Connell, D. W., H. C. Morton and B. M. Bycroft (1982). Oxygen budget for an urban estuary. Australian Journal of Marine and Freshwater Research 33: 607-616. Abstract Various processes affecting the dissolved oxygen content of waters of the Norman Creek estuary, Brisbane, were measured or estimated and standardized for the mid-tide daylight situation. Over a 9-week period, accrual, aeration and photosynthetic processes resulted in the daily addition of 76,225 and 214 kg oxygen, respectively, and export, deaeration, biochemical oxygen demand, plant respiration and benthic respiration in the daily loss of 30, 89,91,97 and 335 kg oxygen, respectively. These processes are highly dynamic, with substantial daily turnover in the water mass. Benthic sediments, enriched with organic matter, exercise a major influence on the dissolved oxygen content of the water. Corben, C. J. and G. J. Ingrarn (1987). A new barred river frog (Myobatrachidae: Mixophyes). Memoirs of the Oueensland Museum 25: 233-237. Abstract Mixophyes fleayi sp. nov. has been confused with both M. balbus and M. fasciolatus, but it is readily separable from these species and the other two members of the genus. The new species is a ground dweller in montane rainforest from Conondale Range, southeast Queensland to Richmond Range northeast New South Wales. Discovery of M. fleayi triggered new examination of the types of mixophyes taxa about which there has been serious confusion, Cosser, P. R. and A. J. Moss (1986). Environmental considerations in planning long term sewage disposal from Caloundra: Part 2 - Biological studies. Use and Abuse of Environmental Information in Engineering. National Environmental Endneering Conference. Institution of Engineers, Barton. pp. 21-25. Abstract The biological effects of sewage effluent discharged to shallow water off Moffat Heads, southeastern Queensland, were assessed. The diversity, abundance and distribution of species of intertidal algae were determined in impacted and control areas. The biomass of algae regrowth was measured following clearing of areas of substrate. The total number of algae species declined from 17-21 at control sites to 10 nearest the outfall. A total of 15 species recorded from control sites did not appear in the impacted area. The Rhodophyta and Phaeophyta appeared most sensitive to pollutants. A difference in species dominance and evenness was observed, with Ulva sp. and Enteromorpha clathrata assuming dominance in the impacted area. The biomass recovered from cleared areas was significantly higher near the outfall as a result of growth stimulation. As a result of toxicants and growth stimulants contained in the effluent, the intertidal community has been significantly altered. Cosser, P. R. (1988a). Macroinvertebrate community structure and chemistry of an organically polluted creek in south east Queensland. Australian Journal of Marine and Freshwater Research 39: 67 1-683. Abstract The benthic macroinvertebrate fauna of Gowrie Creek Queensland and 24 chemical and physical parameters, were monitored over 105km downstream from a major sewage effluent outfall near Toowoomba Queensland between June 1981 and October 1984. Species richness declined to two to three taxa and density of organisms increased significantly just below the outfall, with an increasing number of taxa progressively downstream. The elimination of taxa near the outfall was caused by dissolved oxygen depletion and possible ammonia and sulphide toxicity. Changes in dominance were related to the changes in food types in the transition from a heterotrophic to an autotrophic environment. Cosser, P. R. (1988b). Concentration-flow Relationships and Loads of Phosphorus in the South Pine River, South-east Queensland. M. Phil. Thesis, Griffith University, Brisbane, Queensland Abstract The concentrations of total phosphorus, particulate phosphorus and total dissolved phosphorus were monitored in the upper South Pine River, Queensland, to examine concentration-flow relationships and estimate catchment phosphorus export. Cosser, P. R. (1989a). Estimating catchment phosphorus export using a unit runoff coefficient. 28th Australian Society for Limnologv Congress: Promamme and Abstracts. Australian Society for Limnology, Caulfield East, Victoria. Abstract Unit runoff coefficients were determined for stormflow and baseflow discharge regimes during a two year study of the South Pine River Queensland . Coefficient values were constant during baseflow and relatively constant over three major storm events. This constancy has potentially significant implications for load estimation because, by using the coefficients in conjunction with discharge data stratified by flow regime, reliable estimation is possible. Once measured, the coefficients can be used to estimate both historical and current load directly from the flow record. Cosser, P. R. (1989b). Nutrient concentration-flow relationships and loads in the South Pine River, south-eastem Queensland. I. Phosphorus loads. Australian Journal of Marine and Freshwater Research 40: 613-630. Abstract Total P (TP), particulate P (PP), and total dissolved P (TDP) were monitored over 24 months in the South Pine River, south-eastem Queensland. The sampling interval ranged from 13-16 days during baseflow to less than 30 min during stomflow. Baseflow TP concentrations were relatively constant at 0-03 mg L-1. During stormflow, concentrations of both TDP and PP increased significantly and were positively correlated with flow. TP loads were 8950 kg (56 7 kg km-2 year-1) and 3980 kg (25.2 kg-2 year-1) in 1984 and 1985 respectively. Annual load was influenced by both the absolute discharge volume and the relative proportion of stormflow. PP was the dominant P fraction, comprising 77% of the TP load. Approximately 86, 89 and 75% of the TP, PP and TDP loads, respectively, were canied in only 28% of the time (20 days) during three major storms (50-8% of total flow). Concentrations and exports were high relative to those reported in other Australian studies, suggesting that climatic factors, particularly rainfall intensity, are important in determining export. As a result of the variability in unit area export attributable to variations in runoff, unit area export coefficients are of negligible use for predictive purposes. However, by expressing load in terms of mass per unit runoff per unit area (kg mm-1 kmL), variance attributable to discharge is removed. When expressed in this form, stormflow export was relatively constant (0.46-0-54 kg mm-1 km-2). A method of predicting load from the flow record using this coefficient is proposed. A Coughlan, J. F. (1990). Population and Trophic Ecology of the Freshwater Crayfish Cherax depressw (Crustacea: Parastacidae) in a North Queensland Tropical Rainforest Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. 74 pp. Abstract An autecological investigation into the population and trophic ecology of the freshwater crayfish Cherax depressus (Crustacea: Parastacidae) was conducted in a third order North Queensland tropical rainforest stream. The interaction of the riparian zone with the stream was investigated through monthly leaf litter collections and monthly standing crop estimates. Litterfall and standing crop of litter in the stream were monitored monthly. Litterfall comprised 75% leaf and peaked in October and November (late dry season). Standing crop levels did not correspond to litterfall. Litter accumulated steadily in pools whilst in riffles in the standing crop remained at or below a threshold level which is a function of current velocity and protruding obstacles. Accumulated litter was washed from the stream during high discharge after cyclone Ivor. Cherax depressus was found to shred leaves, prefemng those conditioned for the longest amount of time. Experiments showed a clear preference for the least tough leaves. There was a preference for one species over all others and it is thought that a combination of nutrient content and physical characteristics of the leaf ultimately influence how much it will be processed.The interactions between the crayfish population and the riparian vegetation are discussed with reference to quantity, quality and timing of litter inputs to the stream. The contribution of the crayfish population to litter processing is discussed. A tentative leaf processing budget is presented. Day, D. G. (1988). River mismanagement: policy, practice or nature? Centre for Resource and Environmental Studies, Australian National University, Canberra, ACT. Abstract This paper explores the 'mismanagement' problem for Australian rivers. In reviewing close interrelationships between the physical nature of rivers and their management, questioning policy problems already recognized and those unrecognized in the conflicting and changing perception of riverine resources by society, the paper attempts to put forward some objectives for better river management. Case studies for the Macquarie River, NSW and Thomson River, Victoria, are noted, in particular, the impact of flow regulation on instream water allocation and runoff dynamics. A conceptual model for riverine planning suggests how the complexities and failures in managing rivers might be reduced. Day, D. G. (1989). Resources development or instream protection? The case of Queensland, Australia. Environmentalist 9: 7-23. Abstract The extent of instream water planning in Queensland is considered as well as the potential for new policy development. Important environmental water allocation issues are explored, including instream water resource management policy and the position of the Queensland Water Resources Commission. Derivation of State river management policies and the implications for planning are discussed. Digman, R. (1990). River repair needs rock, not sand. Australian Canemower 12: 29-30. Abstract Erosion control along the Tully River Queensland is discussed. The practice of dozing to place sand across rivers is criticized for being ineffective and for its adverse environmental effects. Rock protection of eroding banks is proposed as a more suitable technique. Costs involved and responsibility for these are discussed. The suggestion is made that the Queensland Electricity Commission should undertake a rock stabilizing programme to overcome erosion which will be aggravated by the proposed Tully-Millstream Hydroelectric Scheme. Dowling, A. J. and B. A. Cowie (1984). Chemical monitoring of underground waters in the Callide, Don and Dee Valleys. Australian Salinitv Newsletter 12: 26-27. Abstract The objectives of this investigation in the Don, Dee and Callide Valleys in Queensland include provision of information on water level and quality changes for selected bores within the valley system, evaluation of differences between bores and assessment of directional trends in water quality attributes. Conclusions regarding salinity, restricted lateral groundwater flow and groundwater leakage are presented. Salinity variations in the Callide alluvium were explained using a simple hydrological model involving recharge, transmission and accumulation areas. Duivenvoorden, L. J. (1988). The Dee River: aquatic flora and acid mine discharge. Water Weeds Management Workshoo. Queensland Institute of Technology, Brisbane. Abstract The open cut gold mine at Mount Morgan in central Queensland lies adjacent to the Dee River and was established about 100 years ago. Upstream of the mine water in the river varies in pH from about 7.2 to 8.0 and contains a diversity of aquatic plants. At the mine the pH of the water is reduced to levels as low as 2.7 and this is associated with a change in the stream flow. The pH of the water and the number of aquatic plant species increase with distance downstream from the mine. Factors which may influence the distribution of aquatic flora are discussed and preliminary results of the heavy metal content in plants are presented. Duivenvoorden, L. J. (1989). Aquatic macrophytes and heavy metal pollution in the Fitzroy River system, Central Queensland. State of Our Rivers Conference, Canberra. Abstract This paper extends an earlier study into the effects of acid mine discharges from the gold and copper mine at Mount Morgan in Central Queensland on the water quality and aquatic macrophytes of the Dee River, a tributary of the Fitzroy River. It documents macrophyte species downstream and provides further data on the heavy metal contents of plants at various sites along the Dee River. Results indicate that more research is needed to assess the extent of pollution from the mine on the Fitzroy River system. Edwards, P. B. (1989). Seasonal changes in larval populations of Culicoides subimmaculatus Lee and Reye (Diptera: Ceratopogonidae), with observations on the influence of tides on larval ecology. Australian Journal of Marine and Freshwater Research 40: 69-78. Abstract At Tingalpa Creek, Brisbane, larvae and pupae of Culicoides subimmaculatur were most numerous 1.94m above datum, midway between mean high-water neaps and mean high-water springs. Monitoring of a field population of immature stages indicated that C. subimmaculatw completes four generations a year, and overwinters in the 4th larval instar. Adults emerge during synchronized periods associated with the lunar tidal cycle; however laboratory experiments indicated that tidal coverage did not affect the time of adult eclosion or of pupation. It is suggested that synchronization occurs at an earlier point in the life cycle, possibly at ecdysis of 3rd to 4th instars. Edwards, T. M. (1988). Design Proposal for Toowong Creek as a Wildlife Corridor and Local Recreational Resource. Grad. Dip. Land Arch. Thesis, Queensland Institute of Technology, Brisbane, Queensland. Abstract The study sets out to achieve a design proposal for Toowong Creek Queensland as a wildlife comdor and community resource. The proposal aims to promote the Toowong Creek wildlife conidor as a model for other creek schemes in Brisbane. The study is presented in two sections: the investigative section and the design proposal section. The investigative section examines the habitat requirements of wildlife in an urban environment and how wildlife corridors function and links these requirements directly to the conditions found in Toowong Creek. The design proposal section covers the site survey, an analysis of the site survey and an evaluation of the analysis, giving options and preferred options. Presents the preferred options as a concept and a management strategy. The study concludes with a master plan showing Toowong Creek as a wildlife comdor and community resource for recreation and nature study. Fenwick, T. D. (1986). Transferable water rights: a Queensland viewpoint. Proceedings of the Joint AWRC-AAES Seminar on Transferable Water Rights. Australian Government Publishing Service, Canberra, ACT. pp. 85102. Abstract The paper provides a brief perspective on irrigation development in Queensland and looks at the present situation for allocation of water. It addresses the constraints to development of a market in water rights and concludes with an overall strategy for enhancing cost recoveries from the Burdekin River Imgation Project. Fleay, A. (1978). Studies on the Ecology and Behaviour of Phalacrocorax sulcirostris (Brandt, 1837) and Phalacrocorax melanoleucos (Vieillot, 18 17) on the Ross River Dam, Townsville. B. Sc. (Hons) Thesis, James Cook University ,Townsville, Queensland.. Abstract Two species of cormorant Phalacrocorax sulcirostris (Brandt, 1837) and Phalacrocorax melanoleucos (Vieillot, 1817) were studied on the Ross River Dam between February and October 1978. Although broadly these species were similar, a number of differences in the use of resources and in the associated behaviours were observed. These differences were considered in terms of potential competition between the species. The comfort behaviours of each species were described and were found to be similar. Except in a few specific instances they were very similar to those described in the literature for the Anatidae. A list of bird species observed on the Dam was compiled and the abundance of some of the more common waterfowl noted. Comments were made regarding the future management of the Dam in relation to these bird populations. Fleming, P. M. (1986). The Burdekin Dam and irrigation project: some environmental consequences with particular reference to drainage and flooding. Proceedin~sof Conference on Plannin E and Manavement of Water for Amiculture in the Tro~ics.International Commission on Irrigation and Drainage. West Perth. pp. 384-392. Abstract The Burdekin irrigation project comprises a large dam at Burdekin Falls some 160km from the mouth of the river, a weir at 50.5km and two pumping stations and supply canals. An area of 45000ha will be irrigated annually in a region adjacent to an existing groundwater supply area of 40000ha. The new development will inigate different soil types and landscapes from the present development and part of an area subject to overbank flooding. The paper discusses possible environmental degradation due to irrigation, resulting from changes in the hydrologic balance, in particular waterlogging and salinization. The necessary surface and subsurface drainage systems will carry agricultural chemicals and fertilizers into the adjacent marine environment. General design and management considerations with respect to the drainage systems are discussed. The large floodways necessary to cany overbank flooding offer a unique opportunity to preserve and manage some significant natural ecosystems. Guilfoyle, B. P. (1978). A Preliminary Study of Water Quality in Bulimba Creek and Tributaries. B. Sc. (Hons) Thesis, Griffith University, Brisbane, Queensland. Abstract This study investigates some water quality parameters in Bulimba Creek, a tributary of the Brisbane River, during an atypical low flow period. The results confirm that along the main stem of the creek the effluent from the overloaded Mimosa Creek sewage treatment plant is an important determinant of water quality for most of the time. The literature canvassed to ascertain the effects of urban development on the stream flow regime and water quality of streams and the review is included in this dissertation. Gilmour, D. A. (1971). The effects of logging on streamflow and sedimentation in a north Queensland rainforest catchment. Commonwealth Forestry Review 50: 39-48. Abstract Stream water samples were collected during logging operations in a 17 square mile rainforest catchment in North Queensland. Analysis by millipore filtration equipment indicated high levels of sediment resulting from low rainfall intensities. A survey of the catchment revealed that most of the sediment was derived from a relatively small number of sediment source areas. Conditions were inserted in the timber sale agreement aimed at preventing the occurrence of these sediment source areas and these proved effective in reducing the sediment level in the streams. A double mass curve analysis indicated a trend towards increased annual discharge since logging commenced in 1960. It is concluded that it is possible to harvest both timber and water from the one catchment provided each producer is prepared to make concessions for the utilisation of the other resource. Gilrnour, D. A. (1977a). Effect of rainforest logging and clearing on water yield and quality in a high rainfall zone of north-east Queensland. The Hvdrology of Northern Australia: Hvdrologv Svmposium. Brisbane, Queensland. pp. 156160. Abstract A pair of small catchments was used in a land use hydrology experiment to determine the effects of logging and clearing in a tropical rainforest. One catchment was kept as an undisturbed control while the other was treated. Logging produced little hydrological change. However, clearing produced a substantial increase in baseflow and the annual water yield increased by 293 mm (10.2 percent) during the first two years after clearing. Logging produced a doubling of the suspended sediment load during high flows and clearing produced a ten-fold increase. Gilmour, D. A. (1977b). Streamflow generation processes in a tropical rainforest catchment: a preliminary assessment. The Hvdrologv of Northern Australia: Hydrologv Svmposium. Brisbane, Queensland. pp. 178-179. Abstract An hypothesis is developed to explain the source of quickflow in a tropical rainforest catchment. This is contrasted with the situation in humid temperature environments. It is indicated that in this particular tropical rainforest environment the variable source area concept of storm flow generation, associated with humid temperate areas, is not applicable, mainly due to the characteristics of rainfall intensity. Gilmour, D. A., D. A. Cassells and M. Bone11 (1982). Hydrological research in the tropical rainforests of North Queensland: some implications for land use management. (Eds E. M. O'Loughlin and L. J. Bren). 1st National Symposium on Forest Hydrology. Melbourne, Victoria. pp. 145-152. Abstract Forest hydrology research in the rainforests of north Queensland began with studies which aimed to quantify the hydrological effects of logging and land clearing. Subsequently, hydrological process studies were undertaken to provide a basis for extrapolating the results from these monitoring studies to the wider rainforest management situation. This paper summarises some of the more important findings from both the monitoring and the process studies. It also outlines a number of implications for land management and future research. It is considered that long term environmental monitoring should be seen as an integral part of land management in the tropics. Gunn, D. (1982). Water management - Tarong power station. Electricity S U D D ~ ~ Association Conference: Section 1: Genera tion. Electricity Supply Association of Australia, Melbourne, Victoria. Abstract This paper depicts the overall water supply and effluent systems management for Tarong power station which is designed to operate on a zero discharge concept using ash dams. Water for construction is drawn from a borefield via a lagoon and 1Okm of pipeline, and for domestic purposes, requires treatment by a plant which includes a reverse osmosis unit. Provision has been made for using dam surface water on sit to supplement the bore water. Make-up water for the operating power station is from the Boyne River Dam and pipeline and three associated pumping stations balancing storages. Conservation measures planned to ensure an adequate supply for power generation are an on site water harvesting system utilizing stomwater in the Meandu Creek and on ash water reclaim system. Hacker, J. L. F. and M. R. Gourlay (1986). The problems of a prograding river mouth: the Pioneer River at Mackay. Proceedings of Short Course on Geoloeical and Environmental Aspects of Coastal Management Programs. Queensland Institute of Technology, Brisbane, Queensland. pp. 93- 109. Abstract This paper presents a case study which looks at the problems of a prograding river mouth, the Pioneer River at Mackay Queensland. It outlines the sedimentation processes which are aggravating the flooding situation in the city. As a result of this sedimentation, major flood related effects in the river are (i) deposition on the floodplain, (ii) formation of Cullen Island Queensland within the estuary, (iii) progradation of the bar, (iv) formation of a new beach ridge south of the river mouth, and (v) extension of the area colonized by mangroves. These various effects are discussed. Examines the influence of tides, waves and wind on the sedimentation processes. States the necessity for this estuarine environment to be studied as a whole. Rate of sedimentation is examined. In conclusion, considers guidelines for the management of the estuary. Hair, I. D. (1990). Hydrogeology of the Russell and Johnstone Rivers alluvial valleys, north Queensland. Department of Primary Industries, Brisbane, Queensland. 57 pp. Abstract An investigations program was initiated by the Department of Mines in 1980 to assess the groundwater resources of the Russell River and Johnstone River-Liverpool Creek areas of northern Queensland. The fieldwork phase of the program was completed in 1985. Pumping tests to determine aquifer characteristics were camed out at four selected sites. Groundwater samples were taken for chemical analysis and determination of ionic constituents. Particle size distribution tests were carried out on selected samples of sand/gravel aquifer material. Little development of groundwater resources has taken place in this part of Queensland, and water requirements for the region are largely met from surface water resources. Results of this investigation show that there is little scope for large scale development of existing groundwater resources. Ham, R. D. (1981). The Ecology of Six Native and Two Introduced Fish Species in the Enoggera Creek System, South-east Queensland. B. Sc. (Hons) Thesis, Griff'ith University, Brisbane, Queensland. Abstract The ecology of two introduced and six native fish species in Enoggera Creek, Brisbane were investigated. Many native species were found upstream from the Enogerra Reservoir but no exotic species. Numbers of introduced species increased as the downstream distance from the reservoir increased. The distribution appears to reflect the habitat alteration in the downstream areas. Harding, P. (1988). Report on Mulgrave River degradation study. Queensland Water Resources Commission, Brisbane. Abstract The US Army Corps of Engineers model, HEC-6, was used to simulate the sediment transport processes in the Mulgrave River Queensland between Gordonvale and Behana Creek to quantify the bed degradation caused by sand extraction operations and to determine the limits for both existing and future operations. While the hydraulic component of the model was calibrated using measured flood levels, there was insufficient information to calibrate the sediment transport component. Therefore, the uncertainty in the applicability of the various available sediment transport formulae was determined by a sensitivity analysis. The effects of the extraction proposals on the water quality, fringing bank vegetation and in stream fish habitats were briefly addressed. Hart, B. T, G. Day, A. Sharp-Paul and T. Beer (1988). Water quality variations during a flood event h the Annan River. Australian ~ournalof - ~ a r i n eand Freshwater Research 39: 250-253. Abstract Variations in water quality during a major flood event that occurred in the Annan River on March 21 1985, are reported. Factor analysis showed that dilution of base flow concentrations by surface runoff was the dominant influence during the rising stage of the flood event, possibly with some flushing of ions from surface layers of the catchment soils also occumng. At low river flow, water quality was dominated by that in groundwater and possibly interflow. Heavy metals were mostly transported in particulate forms. Filterable metal concentrations were low and changed little with flow. Hearnden, M. N. (1986). Resource Use by Mayflies (Insecta: Ephemeroptera) in a Topical Rainforest Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. 95 pp. Abstract Patterns of spatial resource use indicated distinct partitioning of the available habitat among a suite of mayfly species in a tropical rainforest stream. The observed patterns were dependent on the distributions of detrital deposits. In the absence of detritus in erosional, fast-flowing regions, leaf litter was the prime determinant of distributions. Current velocity and substratum particle size were of influence in determining the distribution of these detrial and leaflitter deposits. The carrying capacity of pool habitats exceeded that of the riffle habitat as the result of limited detrital and leaf-litter resources. Detritus was of major importance in the diet of all mayfly species, except one species with a carnivorous habit. Hearnden, M. N. and R. G. Pearson (1991a). Habitat partitioning among the mayfly species (Ephemeroptera) of Yuccabine Creek, a tropical Australian stream. Oecolorria 87: 9 1- 101. Abstract This study examines the distributions among microhabitats of 12 detritivorous species of mayfly in Yuccabine Creek Queensland, an upland tropical rainforest stream. Analysis of the data showed that although all species occurred in all the microhabitats examined, different species had significantly different peaks of abundance in different microhabitats, leading to distinct partitioning of the available habitat. In the absence of fine detritus deposits in fast flowing regions, leaf litter was the prime determinant of species distribution. Current velocity and substratum particle size influenced the distribution of detritus and leaf litter. Heamden, M. N. and R. G . Pearson (1991b). The diets of mayflies (Insecta: Ephemeroptera) in a tropical Australian rainforest stream. Journal of Tropical Freshwater Bioloev (in press). Abstract The diets of 13 species of mayflies from Yuccabine Creek, a tropical rainforest stream, were investigated. Quantitative analyses of gut contents showed that fine detritus was of major importance in the diets of all species except Mirawara sp. 1, which was carnivorous. Dietary overlap was exceptionally high (Horn's coefficient, c = 0.92 to 1.00). There were no differences between winter and summer diets within each species. No significant difference was found between the diets of large and small size classes of any detritivorous species, but the diets of small and large nymphs of Mirawara sp. 1 were significantly different: larger individuals selected for larger numbers of leptophlebiids in the diet, while smaller individuals utilised chironomid prey that were not observed in the guts of the larger size class. . Hearnden, M. N. and R. G. Pearson (1991~).Habitat partitioning among the mayfly species (Ephemeroptera) of Yuccabine Creek, a tropical Australian stream. Oecolorria 87: 91-101. Abstract This study examines the distributions among microhabitats of 12 detritivorous species of mayfly in Yuccabine Creek, an upland tropical rainforest stream. Analysis of data from regular benthic sampling and from in situ experiments using implanted substrata showed that although all species occurred in all the microhabitats examined, different species had significantly different peaks of abundance in different microhabitats, leading to distinct partitioning of the available habitat. The observed patterns of distribution were closely associated with the distribution of fine detritus deposits (FPOM). In the absence of FPOM in fast-flowing regions of the stream, leaf litter was the prime determination of species distribution. Current velocity and substratum particle size influenced the distribution of the detritus and leaf litter. Abundance of mayflies was greatest in the pool habitat for all except two of the species. Herbert, B. (1987). Note on Cherax quadricarinatus from the Jardine River, Cape York Peninsula. Oueensland Naturalist 28:19-21. Abstract This paper compares Cherax quadricarinatus from the Jardine River Queensland with the same species in the Mitchell River (700km to the south). It discusses the four different habitat types inhabited by Jardine River C . quadricarinatus. and remarks on cover size, breeding and diet. Concludes that the difference in reproductive biology and parasitic fauna suggest that the Mitchell River and Jardine River populations of the crayfish species represent intraspecific clinal variations. Hewitt, D. R. (1984). Growth and Bioenergetics of the Freshwater Prawn, Macrobrachiurn australiense (Holthuis). B . Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. Abstract Prawns of the species Macrobrachium australiense were grown using diets of differing composition to determine the suitability of the animal for aquaculture. This required the determination of the calorific loss associated with each energy-consuming bodily process, to construct a partial energy budget. Four diets were used, Caridina (freshwater shrimp), pellets (poultry feed), algae (Spirogyra sp.) and detritus (decayed plant material). The growth rate was highest for the Caridina diet (65% protein) and decreased through pellet, algae and detritus. Growth rate decreased with increasing prawn size. Growth rates of M. australiense were lower than those of culture organisms, but higher than those of organisms not used in aquaculture. Construction of a partial energy budget showed that larger prawns assimilate high nitrogen diets more efficiently. Low nitrogen diets were more efficiently assimilated by small prawns. Plant protein was more efficiently utilized by large prawns than by smaller prawns. It was concluded that different sized M . alcrtraliense would require different feeds in culture. M. rosenbergit would be a wiser choice for aquaculture when the advantages of M . alcrtraliense (non-feeding larval stages with no need of saline water, growth nearly all year round; widespread distribution) are not a consideration. Hicks, D. (1986). Ipswich City's Bremer River: a Strategy for Riverside Recreation Management. Grad. Dip. Land Arch. Thesis, Queensland Institute of Technology, Brisbane, Queensland. Abstract This thesis presents a study which investigates the use of the Bremer River as a recreational resource for the residents of Ipswich and surrounding districts. It looks at the current state of the river comdor relative to physical, social and biological factors and the visual character of the river and adjacent land areas. Examines the likely recreational needs and demands of the local residents and the types of recreational activities that are possible on or beside the river. Determines four options for levels of recreation usage and provides guidelines for management under each of these options. A strategy plan is outlined designating the recreation management options to appropriate areas along the river within the study area. Howell, J. (1987). Epiphytic Diatom Communities of South East Queensland, as Indicator Species of pH Levels (preliminary survey). B. App. Sc. Thesis, Queensland Institute of Technology, Brisbane, Queensland. Abstract Epiphytic diatom communities were investigated at three sites in southeast Queensland: (i) Eighteen Mile Swamp North Stradbroke Island, (ii) a small dam near Boyne Smelters Boyne Island, Gladstone and, (iii) Swanbank Lagoon near Ipswich. Samples of submerged macrophytes were collected in the littoral regions. Physiochemical data at each sampling site was also taken. There was an indication of an association between some diatom communities and a particular macrophytic host. A correlation of diatom community composition with pH levels and water conductivity was established. Hortle, K. G . and R. G. Pearson (1990). The fauna of the Annan River, Far North Queensland, with reference to the impact of tin mining. I. Fishes. Australian Journal of Marine and Freshwater Research 4 1: 677-694. Abstract Fish were sampled at a range of sites in the Annan River system in tropical northern Queensland, using a variety of methods. In all, 25 species were recorded, including 14 principal fresh water forms. Species richness increased in a downstream direction and was directly related to stream size, the best measures of which were catchment area and stream length. When adjusted for stream size, the fish fauna of the Annan River system is relatively rich, compared with temperate Australian systems and streams on other continents. analyses of gut contents of the species found in freshwater showed that six species were carnivorous, four were omnivorous, three were algivorous or detritivorous, and one was piscivorous. Mining were evident at three sites and were associated with a reduced number of species; those eliminated were apparently less tolerant of sediment. Hughes, J. M., M. N. Griffiths and D. A. Harrison (in press). The effects of an organophosphate insecticide on two enzyme loci in the shrimp Caridina sp. Biochemical and Svstematic E c o l o g ~ Abstract This paper examines the effect of acute exposure to the organophosphate pesticide, chlorpyrifos, on genetic structure of freshwater shrimps. Genotype frequencies at two enzyme loci, Pgi and Pgm, were examined. There were significant differences in genotype frequencies between tolerant and susceptible animals in some experiments and not others. This suggests that the differential tolerance occurs only at some concentrations or in some populations due to different linkage relationships between populations. The potential for using this method for monitoring pollution impacts is discussed. Hughes, J. M., D. A. Harrison and I. M. Arthur (1991). Genetic variation at the Pgi locus in the mosquito fish Gambusia afJinis (Poeciliidae) and a possible effect on susceptibility to an insecticide. Biological Journal of the Linnaean Society 44: 153-167. Abstract Although some studies have been completed on genetic variation in relation to tolerance to heavy metals, none have considered pesticide pollution. This study examines the relationship between genotypes at the glucose phasphate isomerase (Pgi) locus in Gamburia and susceptibility to the organophosphate insecticide chlorpyrifos. Laboratory toxicity tests show significant differences in genotype frequencies between susceptible and tolerant groups of fish from one site but not at others. A field survey examined genotype frequencies and levels of pesticide in the fish at seven sites. No chlorpyrifos was found at any of the sites, but a number of organochlorines were recorded. Significant correlations were found between three organochlorines @DT/DDD, DDE and lindane) and frequencies of particular genotypes. There were also significant differences in tolerance between populations and between size classes. These results are discussed in relation to previous work with heavy metals. Ian Drummond and Associates Pty Ltd (1985). Macalister River Improvement Trust: Master Plan. Macalister River Improvement Trust, Maffra. Abstract Reviews the operations of the Macalister River Improvement Trust and makes recommendations for its future. It identifies the seriously degraded state of some of the streams. The strategy plan recommends implementation of a strategy aiming to treat the most urgent stream related problems in a six year works programme. It describes major components of the works programme. A history of the Trust is given. Jackson, B. (1991). The Darling: from floods to drought and poisoned water. Enrrineers Australia 63: 14-16. Abstract Infestations of blue-green algae in the Darling River, New South Wales, are indicative of the environmental degradation of Australia's inland waterways. The contamination is attributed particularly to phosphorus from superphosphates and sewage. Engineering and environmental management options to deal with the problem are discussed. Johnson, I. G. (1990). An Assessment of Fish Ladders in South-eastern Queensland. Ph D Dissertation, University of Queensland, Brisbane, Queensland. Abstract This thesis presents an assessment of fish ladders on major structures in rivers of south-eastem Queensland. It reviews the literature on fish ladder design and efficiency and then presents the results of field studies designed to assess the efficiency of particular types of ladder. Population and community data are summarised for each site. The study also assess the Denil fish ladder. Kailola, P. J. and B. E. Pierce (1988). A new freshwater catfish (Pisces: Ariidae) from northern Australia. Records of the Western Australian Museum 14: 7389. Abstract Describes a new species of fork tailed catfish on the basis of 31 specimens collected in northern Australia between the Fitzroy River, Western Australia and the Mitchell River, Queensland. Comparison is made with other ariid species occurring in northern Australian waters, including the morphologically similar A rius leptaspis ( Bleeker). Kelley, R. E. (198 1). Hydrogeochemistry of the Upper Isaac River: with Comments on the Origin and Tansport of Sediments and Solutes. M. Sc. Thesis, Griffith University, Brisbane, Queensland. Abstract This thesis examines the chemical loadings in the river, both spatially and temporally. As sampling was carried out at wide intervals on an ephemeral stream, the available data in some areas of flow regime is meagre and the establishment of significant correlations is affected. It is estimated however, that the annual loss rate from the catchment of suspended material is approximately 12 tonneslsq km and dissolved material loss approximately 7.8 tonnes/sq km. Although there was sufficient data to produce a broad characterization of the chemical loadings of the river, the paucity of flowing water data at specific sites precluded the adequate correlation with land features. The study did show a reduction in solute concentration with increasing distance downstream. Kent, D. J. (1986). Salinity in the South Burnett. In: Landsca~e.Soil and Water Salinitv. Proceedings of the Darling Downs Regional Worksho~. Toowoomba, March 1986. Department of Primary Industries, Brisbane, Queensland. Abstract After giving an historical introduction, describes the extent of salting effected areas in the South Bumett. States that development in the form of clearing and cultivation have been the main factors contributing to the increased movement of water and salts through the deeply weathered landscapes concerned. Mentions the problem potential, the increasing number of salinity related inquiries being received by Departmental officers. Relates reclamation schemes attempted, which have used either drainage or revegetation techniques. The use of gypsum on smaller wet spots where soil structure has declined is noted. Summarizes future requirements, such as the need for practical reclamation guidelines and systematic data recording. Kerby, B. (1991). Aspects of Invertebrate Drift in a South-East Queensland Stream. B. Sc. Honours Thesis, Division of Environmental Sciences, Griffith University, Brisban, Queensland. 93 pp. Abstract This report has investigated several aspects of invertebrate drift in south-east Queensland streams. The pattern of drift was documented for two streams in the Conondale Ranges. Hourly drift sampling in these streams revealed low drift rates and no distinct die1 patterns. The drift was dominated by the taxa Simuliidae (Diptera), Chironomidae (Diptera), and to a lesser extent Tasmanocoenis (Caenidae: Ephemeroptera), Baetis (Baetidae: Ephemeroptera) and Cheumatopsyche (Hydropsychidae: Trichoptera). The phenomenon of behavioural drift was investigated with the aim of determining why some individuals of particular taxa drift while other individuals (of the same taxa) remain in the substratum. To determine this three aspects were investigated, 1) state of hunger, 2) injury and 3) possible genetic differences between those individuals drifting and those remaining in the substratum. Kevan, S. D. and R. G. Pearson (in press). Toxicity of Diquat pulse exposure to the tropical freshwater shrimp Caridina nilotica ( Atyidae). Bulletin Environmental Contamination and Toxicoloev. Abstract A two hour pulse exposure to diquat concentrations >= 213.4 mg L-l was acutely toxic to the tropical freshwater shrimp Caridina nilotica. Although the two hour PE-LC50 concentration may be greater than recommended concentrations (80 mg diquat11000 m2 plants, excluding wetting agent, for single field applications (QRLPB 1989), it is conceivable that higher concentrations of diquat could occur in the field where saturation of diquat to densely infested areas of plants is necessary. Kneipp, I. J. (1979). The Ecology of Macrobrachium species (Decapoda, Palaemonidae) in a Coastal Stream in North Queensland. Ph.D. Thesis, James Cook University, Townsville, Queen sland. 267 pp. Abstract Five species of Macrobrachium occur in the study area, Bluewater Creek, 27km northwest of Townsville. They are M. latidacrylus (Thallwitz, 1891), M . tolmerum (Riek, 195I), M. australiense (Holthuis, 1950), M. novaehollandiae (de Man, 1908) and M. species A, probably an undescribed species. A multivariate morphometric study gave support to the separation of M. sp. A and M. tolmerum which are morphologically very similar. Field studies were undertaken in order to infer causal relationships between environmental factors and distribution patterns. These were complemented by laboratory studies of responses to selected environmental factors. It is concluded that distribution patterns of Macrobrachium species in the study area are largely determined by temperature, salinity, substrate and current whose effects are interconnected with competition between species and adaptation of the life cycle to fresh water. Kowarsky, J. (1980). Fish passage through the fishway at the Fitzroy River barrage, Rockhampton: Part B: Effects of environmental variation on the upstream movement of fish through the fishway. QDPI, Brisbane, Queensland. Abstract This part of the two-part report seeks to determine the effects of various environmental factors on the upstream passage of fish through the Fitzroy River barrage fishway. A sampling programme was initiated. The study suggests the level of the headwater exerted an important influence on the sizes of fish negotiating the fishway. Smaller fish were excluded at relatively high headwater levels and some larger fish did not use it at relatively low levels. There is some evidence the tailwater level may have influenced the rate of passage through the fishway. The presence and position of open barrage gates did not appear to affect the number of fish using the fishway. Leadbetter, B. W. (1978). A Basis for Evaluating Future Land Use within the Noosa River Catchment. M.Sc. Thesis, Griffith University, Brisbane, Queensland. Abstract The natural environment and current and possible future land use patterns of the Noosa River catchment are examined. The thesis presents a methodology for evaluating future land use change involving initial qualitative assessment of possible impacts using conceptualized models. The technique appears useful in indicating the magnitude of possible impacts with limited data and in isolating the factors or processes effecting changes. The method could be used to limit undesirable changes to acceptable levels. Lever, M. L. (1979). Strategies and Standards for the Protection of Australian Waters. M.Sc. Thesis, Griffith University, Brisbane, Queensland. Abstract A national, coordinated programme to combat water pollution is needed. Types of pollution and methods to control them are discussed and a management decision making process is suggested. A case study showed changing social values in favor of better water quality in an urban creek. A second case study attempted to quantify heavy metal inputs into a Brisbane River estuary and found pollutants which could accumulate in shellfish to levels which may adversely affect consumers' health. Lewis, J. W. (1987). The Red Dome project. Environmental Workshop Papers, Australian Minin~Indusav Council. Dickson. pp. 24-36. Abstract Environmental studies and the underlying philosophy used in the approach to environmental controls are discussed in relation to the Red Dome gold mining project Queensland . Major areas of study include surface water quality monitoring and aquatic fauna surveys, as well as groundwater investigations to determine mine water supplies and a mine dewatering scheme. Liesch, P. W. and G. L. Jocumsen (1982). A survey of the use and management of water resources from the Condamine-Balonne Rivers systems. School of Business Studies, Darling Downs Institute of Advanced Education, Toowoomba. Abstract The survey of water users from the Condamine-Balonne Rivers system is a submission to the Department of National Development and Energy for inclusion of information in the study of National Water Resources Perspectives to the year 2000. The Condamine-Balonne Water Committee surveyed Local Authority Councils and water user associations. The survey is in four sections which solicited responses in domesticlurban water use, river management, total valley development and legislation. Macdonald Wagner Pty Ltd (1986). Tweed River dredging: environmental impact statement. Macdonald Wagner Pty Ltd, Tweed Heads, New South Wales. Abstract This environmental impact statement has been prepared to support a development application to Tweed Shire Council and other authorities for the dredging of river sand from the Tweed River NSW between Barneys Point Bridge and Banora Point and for the stockpiling of the dredged sand on an adjacent privately owned property. It is proposed that sand be dredged from the river utilizing a modern suction dredge with a diesel driven sand pump and the excavated material be pumped via a floating submerged pumpline to the stockpile area. Return water from the stockpile would be contained by use of bund walls and, after a suitable settlement period, would be returned to the Tweed River via Womin Lake. Dredging will be carried out to meet Public Works Department Dredge Management Plan conditions, and more than 30m away from the mangrove stand. Dredging of this section of the Tweed River will enhance water circulation and improve navigation. McIvor, C. C. (1976). The effect of organic and nument enrichment on the benthic macroinvertebrate community of Mogill Creek, Queensland. Water 3: 16-21. Abstract This paper describes the physical environment, water quality, algae and benthic invertebrate communities of Mogill Creek, Brisbane, and the causal factors of biological change due to inputs of nutrients and sewage wastes. Biological monitoring methods are discussed. McMahon, B. J. (1984). Alimentary Structure and its Adaptive Diversity in a Community of Australian Freshwater Teleosts. M. Sc. Thesis, University of Queensland, Brisbane, Queensland. Abstract Members of the Teleostei exhibit remarkable variability in dental apparatus, mouth form and gut morphology, permitting successful utilization of aquatic and terrestrial food resources. This thesis describes alimentary structure and its adaptive diversity in the fish community of the Brisbane River. It interprets the adaptive significance of the dental apparatus and alimentary morpho-histology of each species by reference to the general nature of its food. The Brisbane River fish community exhibits a number of features generally possessed by freshwater fish communities. These include the presence of several stenophages and divergent euryphages, considerable sharing of food resources, high reliance on insect material and an appreciable piscivorous component. Mackey, A. P. (1991). Aspects of the limnology of Yeppen Yeppen Lagoon, central Queensland. Australian Journal of Marine and Fresh water Research 42: 309325. Abstract Aspects of the morphometry and physical and chemical limnology of Yeppen Yeppen Lagoon, in tropical Australia, have been investigated. The lagoon is a channel billabong lying in the old bed of the Fitzroy River. It has a relatively small, shallow and elongated basin. Seasonal variations in water temperature, light regime, oxygen concentration, pH and conductivity suggests that the lagoon exhibits a warm monomictic pattern of thermal stratification rather than a continuous warm polymictic one. The annual heat budget was 3294 calories Maximum work of the wind was 238.8 g-cm ~ m -and ~ , maximum stability was 34.5 g-cm ~ m -Despite ~ . the apparently low stability of stratification, the lagoon remained thermally stratified for much of the year. analysis of wind-distributed heat suggested that slow mixing was taking place even during periods of relatively high stability, although this mixing was insufficient to reoxygenate the hypolimnion, which remained anoxic for much of the year. Yeppen Yeppen Lagoon is likely to prove eutrophic, and it is suggested that primary productivity will be high because a large volume of the lagoon's water is well lit and a large sediment surface area is in contact with the epilimnion. Notes on the biota of Yeppen Yeppen Lagoon are also given. Mallett, C. W. (1963). The Upper Permian flora from Burngrove Creek and Adjacent Areas. B. Sc. (Hons) Thesis, University of Queensland, Brisbane, Queensland. Absmct The flora from localities in the Upper Permian of Central Queensland is described. The flora is dominated by Glossopteris, with Phyllotheca and Cladophlebis playing minor parts. Gangamopteris is notable for its absence. Various floral environments are recognized by the plant characteristics and mode of preservation, the distinction between forest and swamp flora being clearly marked. The classification of Glossopteridae is such that stratigraphic correlation is difficult, but there do seem to be several endemic Australian species of Glossopteris. One new species is described and a new fructification of Glossopteris is described but not named. Midgley, S. H. (1983). The Meandu Creek catchment and a number of small water storages in the immediate vicinity of the Tarong Power Station in the Nanango area, Queensland. An unpublished report to the Queensland Electricity Generating Board, Brisbane, Queensland. Abstract This report provides information on the freshwater fish fauna of the Meandu Creek catchment and a number of small storages near the Tarong Power Station, Nanango, Queensland. A list of fish species and of large Crustacea is provided with indications of relative abundance and some limited water quality data. Milligan, C. J. (1986). An Evaluation of some Stream Characteristics and their Application to Water Quality Assessment in South-eastern Queensland. M. Phil. Thesis, Griffith University, Brisbane, Queensland. Abstract Nine sites within five catchments were chosen for a sampling programme covering a 19 month period. The catchments chosen supported a variety of land use categories. Physico-chemical and biological attributes were sampled concurrently over a range of seasonal conditions. Water flow strongly influenced water chemistry, as several significant correlations were established between rainfall and the physico-chemical parameters of temperature, conductivity, BOD and total phosphorus. The biological data set contained information on the type of fauna, the number of individuals of each type and the number of taxa in each sample. Several methods of analysis were reviewed in order to evaluate the potential relationships between the physicochernical and biological content of samples. The wide variability in the data collected from all catchments indicated that water characteristics were in dynamic equilibria that appeared little affected by land use. Milton, D. A. and A. H. Arthington (1983a). Reproduction and growth of Craterocephalur marjoriae and C . stercusmuscarum (Pisces: Atherinidae) in south-east Queensland, Australia. Freshwater Biology 13: 589-597. Abstract The reproductive cycle and growth of Craterocephalus marjoriae and Craterocephalus stercurmurcarum (Atherinidae) were studied in Brisbane, south-eastem Queensland, over a 17-month period (1981-82). Both species had a 5-month breeding season in spring and summer, with a breeding peak in spring (September-October). Multiple spawning occurred but life time fecundity was not determined. Gonosomatic index values and mean fecundity per female were higher in Craterocephalus marjoriae than in C . stercusmuscarum. Fecundity increased with body length in both species according to the relationship, ~ = a ~ Growth b. rates were similar and growth was adequately described by the von Bertalanffy equation. Both species grew rapidly during the first year and reached maturity the following season. Reproductive strategies are considered in relation to seasonal flooding in the streams inhabited. Milton, D. A. and A. H. Arthington (1983b). Reproductive biology of Gambusia affinis Baird and Girard, Xiphophorus helleri (Gunther) and X . maculatus (Heckel) (Pisces: Poeciliidae) in south-eastern Queensland. Journal of Fish 23: 23-41. Abstract The reproductive biology of three introduced Poeciliidae, Gambusia affinis holbrooki Baird and Girard. Xiphophorus helleri (Gunther) and X . maculatus (Heckel) was studied over a 14 month period in Brisbane. Queensland. Photoperiod and water temperature determined the length of the breeding season in G . affinis which produced up to nine broods between August and March with the peak of reproductive activity in October. Fecundity was linearly related to body weight in G. affinis (mean fecundity = 22.78 f 2 range = 3-108 offspring per brood). X . helleri bred from August to May producing eight to nine broods with peak reproductive activity from October to December. Fecundity was curvilinearly related to body weight (mean fecundity = 60.15 f 3.8, range = 7-183 offspring per broods during the study period. Fecundity was linearly related to standard length (S.L.) (mean fecundity = 27.27 k 2.4 range = 3-92 offspring per brood). Although the reproductive strategy of the three species differs all have the capacity to build up large populations in south-eastern Queensland. Their present distributions and relative abundance are discussed. Milton, D. A. and A. H. Arthington (1984). Reproductive strategy and growth of the Crimson-spotted Rainbow Fish, Melanotaenia splendida fluviatilis (Castelnau) (Pisces: Melanotaeniidae), in south-eastern Queensland. Australian Journal of Marine and Freshwater Research 35: 75-83. Abstract M . s.fluviatilis has a well-defined annual reproductive cycle in south-eastem Queensland. Spawning is confined to October, November and December, with the peak in October, before the onset of summer floods and unpredictable water levels in coastal streams. Juvenile fish grow rapidly and reach maturity in the year following hatching. Growth in both sexes conforms to the von Bertalanffy model, but males grow faster and to larger sizes than females. Differences in the reproductive strategy of M. s.fluviatilis in southern Queensland and that of the more northern subspecies, M. s. splendida, may be related to the relative predictability of flooding, and hence to the probability of egg and juvenile survival, in the two areas. M. s. fluviatilis has low fecundity but the species is, nevertheless, abundant in suitable environments. Milton, D. A. and A. H. Arthington (1985). Reproductive strategy and growth of the Australian Smelt, Retropinna semoni (Weber) (Pisces: Retropinnidae), and the Olive Perchlet, Ambassis nigrippinus (De Vis) (Pisces: Ambassidae), in Brisbane, south-east Queensland. Australian Journal of Marine and Freshwater Research 36: 329-341. Abstract The reproductive biology and growth of R. semoni and A. nigripinnis were studied in Brisbane, south-eastem Queensland, over a 20-month period (1981-1982). R. semoni began to breed in winter at water temperatures exceeding 15OC, reflecting its salmoniform affinities and temperate distribution. A. nigripinnis, a subtropical species of Indo-Pacific origin, required a period of rising temperature before breeding began in spring at 22OC. Both species concentrated their breeding activity into the months that precede summer storms and high, variable stream discharges, which can generate fluctuating water levels, destruction of weedbeds and instability of the stream substrate. Pre-flood spawning also occurs in three other smallbodied native species in the region, and appears to have adaptive value in the seasonally unstable environments and coastal streams. Dispersal of juvenile fish may be facilitated by rising water levels during summer months following spawning. R. semoni grew faster and to larger sizes than A . nigripinnis and growth of both species was adequately described by the von Bertalanffy equation. Male and female R. semoni and male a. nigripinnis, which tends to forage amongst littoral vegetation and in mid-water. Differences in the sizes of eggs and larvae of the two species are also consistent with the probability that they experience different relative exposure to predation. These and other attributes, coupled with pre-flood spawning, enable both species to achieve large populations in suitable habitats within coastal streams, in spite of their relatively low fecundities. I Nolan, G . A. (1985). Levees in the North Queensland flood plain environment. Proceedings of Planning and Management of Water for Agriculture in the Tro~ics: Afro-Asian Regional Conference. International Commission on Irrigation and Drainage, Townsville. pp. 4 17-431. Calamitous floods in the lower reaches of a number of North Queensland rivers have caused considerable damage to riparian lands and, in some cases, loss of life. In recent years to mitigate the effects of these floods, which have frequently ruptured and outflowed the natural levee banks causing gross deposition of sediments, both structural and nonstructural solutions have been adopted in regard to the management of the floodplain. This paper summarizes and reviews the various types of structural levees that have been built in the agricultural, urban, tidal and nontidal environment and draws a number of conclusions regarding the need for greater attention to the implementation of nonstructural controls by way of legislation and town planning. Nolen, J. A. (1988). Aspects of the Life History and Trophic Ecology of A nisocentropus kirramus (Trichoptera: Cal amoceratidae) in a Tropical Rainforest Stream. B. Sc. (Hans)-Thesis, James Cook University, Townsville, Queensland. pp.95. Abstract An ecological study was conducted on the trichopteran Anisocentropus kirromus occuring in a small (third order) upland rainforest stream north Queensland. A. kirromur larvae are common in Birthday Creek where they are involved in the initial breakdown of leaf litter within the stream. Through their feeding activities, nutrients and fine organic matter are made available to the rest of the stream community. From an analysis of larval head widths, A. k i r r m was found to have five instars. Egg masses were located in the field and reared in the laboratory to the first instar stage. General observations were made of pupating larvae both in the laboratory and in the field. The life cycle of A. kirramus from egg to adult is described. The distinctive timing and nature of litter fall together with annual wet seasons are important factors of this tropical environment. The influences of these factors on the life history and tropic ecology of A. kirramus are discussed. Nolen, J. A. and R. G . Pearson (1992a). Life history studies of Anisocentropus kirramus Neboiss (Trichoptera: Calamoceratidae) in a tropical Australian rainforest stream. Aquatic Insects (in press). Abstract Eggs and larvae of Anisocentropus kirramus were collected from leaf packs in riffles and pools in a small upland rainforest stream in tropical Queensland. Adults were collected in floating emergence traps. Egg masses contained 80100 eggs. There were five larval instars and complete development appeared to take several months. Instars 11-V were present in all nine months sampled; instar I was present in all but one month. Adults emerged in all ten months sampled, but there was clear seasonality with peak emergence in the summer. The sex ratio of adults was 1:1. Nolen, J. A. and R. G. Pearson (1992b). Factors affecting litter processing by Anisocentropus kirramus Neboiss (Trichoptera: Calamoceratidae) from an Australian tropical rainforest stream. Aauatic Insects (in press). Abstract Larvae of the caddisfly Anisocentropus kirramus are common leaf shredders in rainforest streams in tropical Queensland. Laboratory experiments were undertaken to examine the effects of: (a) different leaf species and conditions, (b) leaf preferences, (c) temperature and (d) larval stage on litter processing. Leaf species, age and condition each had a significant effect on the amount of leaf material processed. For most species, conditioned leaves were processed fastest but for one species unconditioned leaves were more rapidly processed. Senescent leaves were processed more rapidly than green leaves in three species but not in the other two. Processing occurred at all temperatures (10, 18 and 25 OC),with processing rate increasing with temperature. Outridge, P. M., G. J. Miller, R. J. Neller, J. H. Powell and E. C. Stock (1984). Water quality and benthic biota of Blackwater Creek, Central Queensland. 23rd Australian Societv for Limnology Congress. Australian Society for Lirnnology, Caulfield East, Victoria. Abstract A 12 month survey of Blackwater Creek Queensland indicated that the flow regime and town sewage discharge caused extreme temporal and spatial variations in water quality, affecting, in particular, dissolved oxygen, macronutrients, faecal coliforms, and algal biomass. Thirty-eight taxa of benthic invertebrates were identified, mainly chironomids and the oligochaete, Branchiura sowerbyi. Benthic community characteristics were affected by conductivity, dissolved oxygen, Mg, Fe, and total P in water, and by Cu, Ni, B, Mn, Mo, and total P in sediments. Wet season flooding reduced community parameters, but recovery occurred in less than four months. Orr, T. M. and R. G . Millward (1984). Reproduction and development of Neosilurus ater (Perugia) and Neosilurus hyrlii Steindachner (Teleostei: Plotosidae) in a tropical Queensland stream Australian Journal of Marine and Freshwater Research 35: 187-95. Abstract The reproduction and development of two plotosid catfishes, N. ater and N . hyrtlii, were investigated in a seasonal tributary of the Ross River, northern Queensland. The fishes were observed to move upstream to spawn during monsoonal flooding. Their mating behaviour, embryology and larval development are described. The adaptive significance of a flood-spawning strategy is discussed in relation to food availability, predation, and aeration in seasonal tropical streams. Pearce, B. (1990). Upper Condamine River area and Dalrymple Creek: progress report on assessment of vegetation changes utilizing remote sensing techniques. Water Resources Commission, Brisbane, Queensland. Abstract A review of the current water quality monitoring network in the upper Condarnine River Queensland catchment revealed that significant changes in water quality have occurred in the southeastern headwaters, and simultaneously significant rises in water levels in the major alluvial groundwater aquifers have occurred which correspond with simultaneous deterioration in groundwater quality. It was suspected that major changes in the vegetation cover over the past decade or so may have caused these changes in water quality and groundwater levels. This report outlines the progress being made in assessing these changes utilizing remote sensing techniques. Pearson, R.G. (1991). Ecology of fresh waters in the Queensland wet tropics: Current knowledge and research needs for monitoring and management. In: Tropical Rainforest Research in Australia. (Eds M. Goudberg, M. Bone11 and D. Benzaken). Institute for Topical Rainforest Studies. James Cook University, Townsville, Queensland, pp. 87-94. Abstract The study of freshwater ecology in the tropics is still in its infancy, although work has been occurring for some time in both rainforest freshwater streams and standing water bodies. Streams in the northern tropics show a seasonal hydrograph but nevertheless contain a more diverse invertebrate fauna than found elsewhere. Much of the invertebrate fauna depend on the detritus food web; current studies focus on the differential rates of detritus input and decomposition and use by different organisms. While most research to date has centred on studies of invertebrates, research into the fish and frog fauna of rainforest streams has shed new light on the behaviour, diversity and population dynamics of freshwater vertebrates. Pearson, R.G. (1991). Ecology of the Burdekin River. Report to the Land and Water Resources Research and Development Corporation, Canberra, ACI: Abstract A two year study of the habitats and biota of the middle Burdekin River Queensland is described. The river is a large, seasonal, tropical river draining a catchment with varied vegetation, severe land degradation and a new dam along its course. Aquatic macrophytes were virtually absent and no plankton, apart from shrimp larvae was recorded. Multivariate analyses of invertebrate samples produced site groups characterized by sediment size, current velocity, depth and the amount of particulate in organic matter. Results were supported by Anovas performed on groups derived from cluster analysis and by multiple regression analysis of species against environmental variables. Differences between sites up and downstream of the Burdekin Falls reflected disturbances due to minor flooding. Most of the common taxa demonstrated definite seasonal trends in abundance while some taxa were of very patchy distribution both spatially and temporally. The project is considered to have provided a necessary baseline for future studies. Pearson, R. G., L. J. Benson and R. E. W. Smith (1986). Diversity and abundance of the fauna in Yuccabine Creek, a tropical rain forest stream. In: Lirnnolopy in Australia. (Eds P. De Deckker and W. D. Williams). CSIRO, Melbourne and Dr W. Junk, Dordrecht. pp. 329-342. Abstract This paper introduces a long term study of Yuccabine Creek, an upland rainforest stream situated in tropical Queensland. The stream is rocky and comprises alternating riffles and pools. It is acidic with low conductivity and seasonally variable temperature and discharge reflecting the regional climate of hot wet summers and warm drier winters. In comparison with streams elsewhere, the invertebrate fauna is diverse, currently 267 species have been recognized from one 50m stretch of riffle. From a year's regular sampling, 21 1 invertebrate species were collected, although 56 of these occurred only once. Only two species of fish occur. Data on diversity, abundance and variability of samples are summarized for a full year, but patterns of change are not considered here. The mean number of taxa collected per month was 105 and the mean monthly abundance per square metre was 2768 animals. Variability of samples was usually high, indicating patchy distributions of all but the commonest species. Preliminary analysis shows that the fauna is dominated numerically and in number of species by detritivorous collectors, with smaller numbers of predators, grazers-scrapers, filterers and shredders. Yuccabine Creek does not have the constancy of conditions associated with the wet equatorial tropics, however, it probably does represent a common type of system to be found in the geographically widespread wet but seasonal vopics and it reflects the highly seasonal pattern generally reported for Australian streams. The diversity and organization of the community in Yuccabine Creek are discussed in the light of current ecological ideas. Seasonality of the stream is a major factor in determining the composition of its fauna. Pearson, R. G. and L. K. Penridge (1987). The effects of pollution by organic sugar mill effluent on the macroinvertebrates of a stream in tropical Queensland, Australia. Journal of Environmental Management 24: 205-215. Abstract Effects of discharge of organic effluent from a sugar mill were examined for the lower reaches of Babinda Creek and Russell River Queensland . Increased pollution led to decreased diversity of macroinvertebrate fauna. With heavy pollution, Oligochaeta and one species of Chironomidae dominated the fauna. Results were produced using techniques that could be readily used by non-specialist mill staff to monitor stream quality. Pearson, R. G. and L. K. Penridge (1979). An Ecological Survey of Selected Rivers in Queensland. James Cook University of North Queensland, Townsville. 234 pp. , Abstract The Northern Rivers Survey (NRS) was instituted in order to provide information to the sugar industry regarding the effects of sugar mill effluents on streams. The Introduction (Section 1) discusses the background to the work, the rationale of the approach taken, and the main aims of the NRS. The approach was to use biological parameters as indicators of water quality, and to correlate these with the physico-chemical effects of effluents. In Section 2, the general surveys of the selected streams and rivers are described. Several different sampling methods were used which were simple but effective. The results clearly showed the relationship that types of treatment and dilution of effluents bear to stream quality. Further results demonstrated the capability of the fauna to recolonize previously disturbed areas. It was shown that the changes that take place with introduction of the mill effluent were very similar to those reported from elsewhere in the world (see Hynes, 1960). Moreover the composition of the animal communities changed with varying levels of pollution. In general a level of about 6.0 - 6.5 ppm DO was found to be the minimum required to support a healthy biota. Pearson, R. G. and R. K. Tobin (1989). Litter consumption by invertebrates from an Australian tropical rainforest stream. Archive Hvdrobiology 116: 71-80. Abstract Larvae of the caddisflies Anisocentropus sp. (Calamoceratidae) and Triplectides sp. (Leptoceridae), and the mayfly A t a l o nella sp. (Leptophlebiidae), collected from Yuccabine Creek, an upland tropical rainforest stream, were fed soaked green leaves of Ardisia brevipedata (Myrsinaceae) and Rhodomyrtus trineura (Mytraceae) in the laboratory. The larvae of both caddis species caused considerable breakdown of leaf discs and production of FPOM. The proportions of total processing due to the caddis larvae ranged from 34.8% ( Anisocentropus sp. fed Ardisia brevipedata leaves) to 82.5% (Anisocentropus sp. fed Rhodomyrtus trineura leaves). Atalonella sp. did not feed on the fresh leaf material. Field and laboratory decomposition rates reflected differences in initial nutrient content of the leaves as well as changes in nutrient levels associated with the decomposition process. In the laboratory R hodomyrtus trineura leaves (2.95%N) were prefened to Ardisia brevipedata leaves (1.45%N) which, in this field, were preferred to Rhodumnia sessilij7ora (Myrtaceae) leaves (1.08%). Pearson, R. G., R. K. Tobin, R. E. W. Smith and L. J. Benson (1989). Standing crop and processing of rainforest litter in a tropical Australian stream Archives Hvdrobiolo~v115: 48 1-498. Abstract Standing crop of litter in Yuccabine Creek, an Australian upland rainforest stream, varied from 2.4 2 0.5 to 11.5 f 2.7g dry weight per 1/16m2, was greatest in the late dry season (October, early summer), and differed substantially between years, because of variations in retention rate rather than in litterfall. Predominant macroinvertebrates in natural litter packs (82%by numbers) were caddis larvae (Trichoptera: Leptoceridae and Calamoceratidae) which appeared to be the main shredders of leaf litter. Rates of litter processing in the stream were estimated using artificial litter packs of single or mixed species and of fresh or aged leaves. Macroinvertebrates accounted for up to 77% of processing after 64 days (aged leaves), but there was great variation between experiments according to differences in leaf species, pool or riffle environments, and time of year. The most rapid processing resulted in a processing coefficient (-k) value of 0.017, and 50% decay value (T50) of 32 d. The slowest processing (estimated (TSO> 400 d) was for fresh Rhodamnia sessiliflora leaves. There was no apparent relationship between temperature and processing rate in the field, but this result may have been due to a great abundance of litter in summer. The observed variation in the results was caused largely by local factors, such as leaf species; presence, abundance and distribution of shredders; and the temporal changes in standing crop of litter and abundance of shredders. Pettigrove, V. (1989). Larval mouthpart deformities in Procladie paludicola Skuse (Diptera: Chironomidae) from the Murray and Darling Rivers, Australia. Hydrobioloeia 179: 111-117. Abstract In consequence of studies indicating a link between structural deformities in chironomid larvae and high levels of particular pollutants, the incidence of deformities in Procladius paludicola was examined in the MurrayDarling system. As part of a long term biological monitoring programme, artificial substrate samples from seven riverine sites were collected in 1985-86, five on the Mumy River and one each on the Darling and Mummbidgee Rivers. A high incidence of ligula (mouthpart) deformities was found: of 522 larvae examined, 19 deformities were detected, one in the second instar, three in the third instar and 15 in the final instar. This is the first report of deformities in Australian Freshwater insects, and is discussed in relation to known toxic pollutants within the catchment. Pfund, D. P. (1987). A Population Study in the Life Cycle of M. macleayi in the Noosa River System. B. App. Sc. Thesis, Queensland Institute of Technology, Brisbane, Queensland. Abstract This report studies a four month period part of the life cycle of juvenile Metapenaeus macleayi within the Noosa River Queensland system. This species was the dominant species at Lake Cootharaba when using a daylight trawling method. During the sampling months from July to early October it was found post-larva occurred over this period, though decreased with time. This indicated a trend of overwintering, as there was only a relatively small growth rate of the juvenile population in this time. The density of the juveniles increased with time. This was found to be the result of the prawns altering the phase of their life cycle from post-larva to juveniles. The fishing season for these prawns began a month early at Lake Cootharaba suggesting there was sufficient number of the larger sized juveniles for fishing to be commercially viable. Poplawski, W. A. and M. R. Gourlay (1987). Wash load estimation for rivers in North Queensland. 3rd Conference on Hvdraulics in Civil En gineerin g. Melbourne. pp. 169-170. Abstract A method based on the Upper Mississippi River Basin Commission formula is proposed for estimating the wash loads in three north Queensland catchment areas: the Burdekin River, Flinders River, Mulgrave and Russell Rivers. This method lumps in one regional factor the influence of rainfall, catchment characteristics and land use. As wash load is a significant component of total sediment transport, it is proposed that a study be undertaken to map values of the regional factor and the influence of climate, geology and land use be further investigated. It is recommended that regional factor values k = 95 to 140 be adopted for catchments between latitudes 17 deg S and 21 deg S until more reliable data becomes available. Poplawski, W. A. (1989). Report on Basin 1362: Barker-Barambah catchment statistical analysis of water quality data collected by the Water Resources Commission. Volume 1: Main Report. Water Resources Commission, Brisbane. 9 pp. Abstract This report examines trends in 20 years of water quality records for several gauging stations in the Barker-Barambah catchment, including conductivity, dissolved ions, sodium, chloride and sodium absorption ratio (SAR). Recommendations on further monitoring and statistical analyses of water quality data are presented. Poplawski, W. A., J. Piorewicz and M. R. Gourlay (1989). Sediment transport in an inland river in North Queensland. Hvdrobiologia 1761177: 77-92. Abstract A sediment transport study was undertaken at Glendower QLD, a possible damsite on the Flinders River, to assess potential sediment in filling of a future storage basin. Suspended sediment samples were collected from three sites on the river during a flood in January 1982. Particulate concentrations and grain size distributions were determined and the latter were compared with bed material size distibutions. Of methods assessed for predicting bed material transport, those treating bed load and suspended load independently were selected and field data were used to determine the wash load and the suspended bed material load. The bed load was then computed in order to determine the total sediment load. Pringle, A. W. (1991). Fluvial sediment supply to the north-east Queensland coast, Australia. Australian Geographic Studies 29: 114-138. Abstract River discharge and sediment yield are examined in the catchments of the Barron, Mulgrave-Russell and Burdekin Rivers Queensland. Their initial erosive impact and constructional effect are examined along the Burdekin and Barron delta coasts. The effects of human interference are noted. Pusey, B. J., and A. H. Arthington (1991). Limitations to the valid applicability of the Instream Flow Incremental Methodology (IFIM) for determining in-stream flow requirements in highly variable Australian lotic environments. Internationale VereinieunP fur Theoretische und An gewandte Limnoloeie 24: 2559, Abstract The Instream Flow Incremental Methodology (IFIM) was used to assess changes to fish habitat availability in Barambah Creek, Murgon, Queensland following construction of the Bjelke-Petersen Dam. The generated relationships between discharge and habitat availability were used to assess the potential changes to fish species diversity and the abundance of rare species, species included in the amateur angling industry and of macroinvertebrates. Two major responses of habitat availability to discharge were revealed by the simulation process. The first was a linear or curvilinear response of increasing habitat with increasing discharge, demonstrated for the majority of small-bodied fishes. The second response, or more properly, lack of response was shown by larger bodied fish including rare species and important angling species. The m6ority of these species could bk properly considered pool dwellers. The Bjelke-Petersen Dam is expected to reduce discharge in Barambah Creek by 50 %. This should result in a decrease in habitat availability of approximately 50 % for the species considered. The discharge of rivers of South-east Queensland shows marked seasonal and annual variability and therefore so should habitat availability. In determining the impact of the Bjelke-Petersen Dam it is necessary to know the importance of habitat to the regulation of the fish communities of such rivers. We believe that the variability of the flow regime and the incidence of flooding are more important structuring agents and that fish communities rarely reach densities high enough to generate conditions where habitat is a limiting resource. Operating conditions of the dam have a greater potential for impact on the fish fauna than a simple reduction in discharge. Release of water for downstream imgation is scheduled to occur in periods of predictably low flows at a time when many species reproduce. Quinn, N. J. (1978). Numerical Analyses of the Fish Assemblages of Serpentine Creek. M. Sc. Thesis, University of Queensland, Brisbane, Queensland. Abstract Ten sites were sampled for fish assemblages in a small mangrove-lined creek 34 times between Nov 1975-Apr 1977. Data on salinity and water temperature were obtained on each occasion. Representative sediment samples for wet and dry seasons were collected and rainfall data obtained from the Bureau of Meteorology. These abiotic data showed marked temporal variation. Fourier analysis was performed on rainfall, salinity, . water temperature.and on the differences between hydrological data taken in Moreton Bay and Serpentine Creek. Significant annual cycles were revealed. Forty-five taxa were recorded, with some statistically significant differences between day and night catches. Recordings of species in groups were subjected to several methods of statistical analysis. Three site groups were identified. A coefficient of dispersion was used to determine the aggregation of 22 abundant species. Although significant levels of aggregation were found, the coefficient of dispersion was ineffective in determining species that would characterize a given single time group. Rarnrn, R. A. (1981). Vibrio cholerae in Queensland river systems 1977-1980. Australian Water and Wastewater Association. Federal Convention. Sydney. Abstract . The presence of Vibrio cholerae in some southern Queensland streams places obligations on those involved with water supply and public health. The opportunity exists to monitor the natural history of V. cholerae in an environmental surface water system and to assess the obligations placed on public health authorities, which include the protection of the public, and surveillance of rivers, sewage treatment plants and drinking water plants for the presence of the organism. Mentions the 'over-wintering' phenomenon, where cholera tends to disappear, from streams in the 'dry' and reappear in the 'wet' (summer) in Queensland. Reeve, R. and I. F. Fergus (1983). Black and white waters and their ~ossible relationships to fie podzolization process. Australian ~ournal'of Soil Research 21: 59-66. Highly coloured, organic-stained water (black water) occurs as springs, seeps and perched lakes in the Cooloola area Queensland. Springs of clear, colourless water (white water) sometimes occur in close proximity to the black water. Field evidence suggests that black waters move laterally along semipermeable B horizons of humus podzols, whereas white waters are part of a much larger storage system in which the water has been decolorized by contact with the C horizons. Thus it appears that black waters are the active eluviating agent and white waters are the residual liquid phase of the podzolization process. Chemical analyses of black and white waters, and the results of a laboratory leaching experiment, support this view. Possible mechanisms and some implications for the genesis of podzol B horizons are discussed. Rosser, Z. C. (1991). The Role of Physical Disturbance as a Structuring Force of Invertebrate Communities in two Rainforest Streams. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. Abstract The role of physical disturbance in the structuring of macroinvertebrate communities of two tropical forest streams was examined. Two geographically isolated sites were chosen. The upland site at Birthday Creek was known to possess a biogeographically distinct taxa fiom the lowland site at Gorge Creek. At both sites, natural, flood-induced substrate movement was simulated through the physical manipulation of artificial (brick) substrates. A range of treatments were incorporated to simulate natural disturbances of differing intensities. Four treatment levels were used, ranging from an undisturbed control at one extreme, to substrates which were both tumbled and scrubbed, with two intermediate treatments. Fauna from natural stones was monitored throughout the study, revealing a community which undergoes temporal and spatial changes following the summer wet season. The ecological implications of the results and their applicability to pertaining ecological theory are also discussed. Rudd, P. J. and V. G. Curnrnins (1988). Mackeys Creek catchment project: final report. Department of Primary Industries, Brisbane, Queensland. Abstract Investigations by officers from the Queensland Soil Conservation Services Branch showed that the erosion and erosive flooding problems in the Mackeys Creek Queensland area were aggravated by a lack of coordinated drainage. Detailed topographic information was required to develop a coordinated plan, and orthographic maps were considered to be the most efficient means of obtaining the topographic information. Orthophotos were provided in late 1986 and used to develop technical solutions to the runoff coordination problems and prepare conservation plans for individual properties and the catchment. Since the plans were prepared, landholder meetings have solved some runoff coordination problems, backhoe drains on the road reserves were widened and trash retention and green cane harvesting are practised in 60%of the catchment. Russell, D. J. (1992). Fish movements through a fishway on a tidal barrage in subtropical Queensland. Proceeding of the Roval Societv of Oueensland 101. Abstract A 32 month study was undertaken of fish movements through a "pool-andweir" fishway on the Burnett River barrage in south-eastem Queensland. A bi-directional fish trap was used to catch in excess of 4100 fish from 25 species. Of these, 19 species were moving upstream and 20 were moving downstream. Arius graeffei, Notesthes robusta, Anguilla reinhardtii and Mugil cephalus comprised the majority of the fish moving downstream while graeffei,A. reinhardtii and M . cephalus were the dominant species moving upstream. Mature M . cephalus in near spawning condition moved downstream in May/June and coincidentally immature. M. cephalus moved upstream. Rates of fish movement through the fishway are considered poor and measures to enhance its effectiveness are discussed. Russell, D. J. and R. N. Garrett (1983). Use by juvenile Barramundi, Lates calcarifer (Bloch), and other fishes of temporary supralittoral habitats in a tropical estuary in Northern Australia. Australian Journal of Marine and Freshwater Research 34: 805-811. Abstract Use by fishes of temporary pools created by high seasonal tides, which occur each year from October until April, on the saltpans and littorals adjacent to the Norman River estuary in northern Queensland was investigated. Fish entering the pools were sampled with on-way tidal traps placed in inlet gutters, and fish in the pools were poisoned using rotenone. Recruitment to the pools by fish occurred soon after the initial tidal inundation. Juvenile fish of 37 species, including the commercially important food fish L. calcarifer, used the pools. The first barramundi were found 8 weeks after initial inundation and for the remainder of the study they continually migrated into these habitats. The total length of the smallest L. calcarifer sampled was 9.5 mm. Salinities in pools containing fish ranged from 94x10-3 to less than 2 1x 10-3 temperatures reached 36OC. Russell, D. J. and R. N. Garrett (1985). Early life history of Barramundi Lates calcarifer (Bloch), in North-eastem Quee-nsland. ~ u s k a lan i Journal of Marine and Freshwater Research 36: 191-201. Abstract Larval barramundi in the size range 2.8-5.2mm were collected from plankton in two estuaries in north-eastem Queensland from 31 October 1979 until 13 February 1980. After leaving the plankton, barramundi moved into nearby brackish and freshwater swamps. These areas acted as nursery grounds, offering both protection from predators, and abundant prey in the form of insect larvae, other Ash and crustaceans. These habitats exhibit a wide range of salinities (fresh water -44 x 103 mb 1-1) and surface water temperatures (23-36OC). Juvenile barramundi commenced migration from these swamps -into permanent tidal creeks around April where they remained for up to 9 months before dispersal into the estuary, up rivers or along coastal foreshores. The diet of the barramundi in these tidal creeks was exclusively fish and crustaceans. Juvenile barramundi were resident in tidal creeks that had been subjected to substantial human interference through habitat alteration. Destruction of nursery swamps may pose a serious threat to local barramundi stocks near centres of human population on the eastern Queensland coast. Russell, D. J. and R. N. Garrett (1988). Movements of juvenile barramundi, Lates calcarifer (Bloch), in North-eastem Queensland. Australian Journal of Marine and Freshwater Research 39: 1 17-23. Abstract Movements of juvenile barramundi resident in tidal creeks of two northeastern Queensland coastal bays were determined using tag and recapture techniques. In a three year period from 1978, 1268 mainly young-of-the-year barramundi were tagged and 213 (17%) recaptured. Most fish were recaptured at the original tagging location, with only 32 (2.5% of all fish tagged) caught away from the tidal creeks where they were released. Marked fish continued to be recaptured within the tidal creeks until they were about one year old. Barramundi of this age moved out into the main estuary and I dispersed into adjacent streams and coastal habitats. After leaving the tidal creeks, barramundi tagged in Trinity Bay moved an average distance of 7.6km, whereas those tagged in Rockingham Bay moved an average of 23 km. Factors which may limit the movements of these juvenile fish are discussed. Saenger, P. (1982). Macrobenthos of the cooling water discharge canal of the Gladstone Power Station, Queensland. Australian Journal of Marine and Freshwater Research 33: 1083-1095. Abstract Quantitative sampling of the macrobenthos of the cooling water discharge canal of the Gladstone Power Station has been conducted monthly from Sept 1976 to July 1980 (sampling times 1-47), to provide information on (i) the effects of an initially small but increasing thermal discharge on this biota, and (ii) the likely effects that could be expected to occur in the Calliope River, when the power station is fully commissioned. Considerable fluctuation was found in the biotic data. It is concluded that the changes in the benthos of the canal can be attributed primarily to changes in flow rates, which, in turn, have altered the sediment composition. This is supported by a change in the benthic fauna, with a gradual replacement of species of known sandy mud affinities by species living on or in stiff clays. With a design maximum temperature differential of 8.2 deg C and with lower water velocities outside the canal, the present data suggest that it is unlikely that the benthic fauna of the Calliope River, adjacent to the power station, will be markedly altered as a result of the thermal discharge. However, because of abiotic and biotic differences between the canal and the river, the testing of this extrapolation must await the analysis of the 'post-thermal' data presently being collected. Sargent, D. M. (1991). The western Queensland floods: April 1990. Challenges for t : International Hydrologv and Water Resources Sustainable Develo~men Svm~osium.Institution of Engineers, Barton. pp. 35-40. Abstract Record or near record flooding occurred over a wide area of western Queensland during April 1990 with river levels in some towns exceeding the previous record flood height, since European settlement, by more than a metre. This paper outlines a recently completed study into the flooding of the six towns most severely affected, or most at risk from flooding during this event, namely Charleville, Augathella, Cunnamulla, Blackall, Alpha and Jericho. The paper describes the hydrology of the river systems concentrating on estimation of event probability of the April 1990 flood, the extent and nature in each town and studies and recommendations in regard to future flood management for the six towns. Emphasis is given to the flooding in Charleville, the largest of the towns studied. Smith, R. E. W. (1982). The Ecology of the Pool Fauna in an Intennittent Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. Abstract The ecology of the benthic macroinvertebrate communities in ten pools of an intermittent stream (the Campus Creek) was studied. An examination of the diurnal and seasonal environmental changes within the pools showed that the pools had large ranges of temperature, dissolved oxygen, conductivity, pH and algal density and that the actual ranges for each variable differed between the pools. The benthic macroinvertebrate communities in the pools were shown to be diverse, with a mean number of 42.6 species per pool and a total of 103 species represented, 80 of which were insects. Cluster analysis of community change in all the pools showed that major changes in the communities were caused by stream flow, and the drying of the pools (provided the pools persisted for more than four months after the cessation of stream flow). Specialised faunas were associated with both these stages during the existence of the pools. The introduction of a fish species, Leiopotherapon unicolor, caused major changes in the macroinvertebrate community of one pool, and these changes were more important than the effect of drylng of the pool. The natural colonisation of another pool by three other fish species had similar effects. In both pools fish acted as keystone species. Smith, R. E. W. (1987). The Ecology of Australatya striolata (McCulloch and McNeill) (Decapoda: Atyidae). Ph.D. Thesis, James Cook University, Townsville, Queensland. 177 pp. Abstract The ecology of the protandrous freshwater shrimp, Australatya striolata (McCulloch and McNeill), was studied in two stream systems in north Queensland, in the context of its distribution in eastern Australia. The size frequency distributions of the populations studied were found to be bimodal, with the left mode consisting primarily of males, and the right mode of females. The modal size classes did not vary through time, although recruitment was found to be seasonal. The most likely mechanism for the maintenance of this bimodal distribution was a two-stage curve of an initial phase of relatively rapid growth of juveniles followed by very slow growth of mature males, then a relatively rapid transition from male to female size followed by very slow growth of mature females. This explanation was well supported by a sigmoidal growth curve for individuals between the modal size classes, low levels of recruitment and negligible growth of tagged and caged males and females. Analysis of length frequency distributions through time also indicated very slow growth for mature males and females (lmm in 870 days), and rapid growth of juveniles (2-3mm in 61 days). This growth pattern is possibly unique in the recorded literature. Smith, R. E. W. and R. G. Pearson (1984). Survival of Sclerocyphon bicolor Carter (Coleoptera: Psephenidae) in an intermittent stream in north Queensland. Journal of the Australian Entomological Societv 24: 101- 102. Abstract Larvae of a water penny, Sclerocyphon bicolor, of a range of instars were abundant in an intermitten stream in north Queensland 2 to 3 h after the commencement of stream flow. In the laboratory these larvae could s w i v e out of water for up to 4 months, and withstand the loss of up to 79.2% of their initial body water. Field collections found larvae in substrate which had been dry for up to 6 months. The ability of these larvae to survive out of water is attributable to (i) quiescence when out of water; (ii) considerable tolerance to water loss; and (iii) seeking of cooler, more humid regions within the substrate. Smith, R. E. W. and R. G . Pearson (1987). The macroinvertebrate communities of temporary pools in an intermittent stream in tropical Queensland. Hvdrobiolorria 150: 45-61. Abstract Nine pools were studied in an intermittent stream. They were close to each other but differed in size, substratum, amount of shade and duration of water presence. Initial conditions were set by wet season flooding, following which each pool developed its own character. Cluster analysis showed that communities changed substantially with time in both species composition and abundance, and that some initially similar communities diverged while some initially dissimilar ones converged. Principal Components Analysis showed that these community changes were due largely to the drying of the pools, and to seasonal effects. Specialised drying communities developed in the pools of longer duration (up to 8 months), but not in the short-lived pools (3-4 months). Apparently similar numerical responses in different pools were often caused by different suites of predominant species. The diversity of the fauna (total of 78 species) was high in comparison with similar habitats in nontropical regions. The pattern of development of the pools' communities was much as expected from island biogeography theory, except that there was no relationship between species richness and duration and size of pools. The species complements were largely opportunistic, being governed by extreme environmental disturbance, St Clair, R. M. and J. A. Nolen. (1989). Life histories of Trichoptera from the wet tropics of Queensland. 28th Australian Society for ~ i m n o l Congress: o~~ Programme and Abstracts. Australian Society for Limnology, Caulfield East, Victoria. Abstract Life histories of two species of Leptoceridae are being studies at Birthday Creek, Queensland. Preliminary results show that in the summer wet season an undescribed species of Notalina is univoltine at the site and Triplectides gonetalus is either univoltine or has more than one generation per year. A population of the Calamoceratidae, Anisocentropus kirramus, is also being studied at a site further upstream. Results are compared with results of life history studies of Trichoptera from around Australia. Sonnenburg, R. (1987). Brisbane's diminishing wetlands. Habitat 15: 36-37. Abstract Land south of the Pine River, 25km north of Brisbane, is presently subject to an application for rezoning. The 500ha contains mangroves, casuarinas, eucalypts and melaleucas, interspersed between freshwater swamps, salt marshes and tidal mudflats. It provides a major nesting area for egrets and ibis, and provides a habitat for Jabiru and brolgas. The value of the land lies in its easy accessibility and close proximity to the city of Brisbane. It is a popular recreational fishing area and the tidal mudflats are essential to commercial fisheries in the Moreton Bay region. Development of the area has been opposed both by environmental groups and commercial fishermen. Sonnenburg, R. (1988). Birds of the threatened wetlands. Wildlife Australia 25: 2325. Abstract This report lists birdlife observed on a small freshwater swamp in an area near the Pine River Queensland. It describes the habitats and species and notes that a Ministerial rezoning application to develop a canal estate is being considered for the area, which is also a popular weekend fishing spot. Staples, D.J. (1984). Habitat requirements of juvenile prawns. Proceedings of the Conference on the Potential of Aauaculture in Oueensland. Department of Primary Industries, Brisbane, Queensland. pp. 87-102. Abstract This report introduces the species of prawns which form the basis of the Queensland prawn catch. Gives the life history of the prawns, during which the larvae are transported from the offshore spawning grounds to the shallow inshore coastal regions and estuaries which function as nursery areas for the young prawns. Discusses the habitat requirements of juvenile prawns, commenting on their spatial and temporal distibution. Particular studies based on sampling in the Gulf of Carpentaria and in Moreton Bay are mentioned. Taxonomy, ecology and behaviour of the genera Penaeus and Metapenaeus are examined from an Indo-West Pacific perspective. The relationship between prawn nursery areas and fishing ground catches is examined. It is concluded that each species of prawn requires a well defined set of environmental conditions for its survival, and that any removal of mangroves or sea-grass meadows must have some impact on existing fisheries. Steele, I. G. (1989). High-resolution profiles of temperature and dissolved oxygen in a river. Hvdrobiolo~ia179: 17-24. Abstract High resolution profiles of the Bremer River Queensland were made using five stations placed 3 km apart, employing velocity meters equipped to measure water quality simultaneously every 10 minutes. Depth, temperature, conductivity and dissolved oxygen (DO) were measured and the data were extrapolated upstream and downstream of the station using the velocity data. When the average cross sectional speed was 0.25m/s (typical of tidal conditions), the extrapolated data points were 150m apart, giving a resolution of 7/km compared to 0.3/km for the stations alone. Details of the extrapolation process are given. The computer programmes used have been generalized for other rivers. The high resolution obtained enabled the structure and variability of the DO sag in the Bremer River to be studied. Tickle, K. S. and J. Law (1987). Tully Millstream project: derivation of stream flow. Queensland Water Resources Commission, Brisbane, Queensland. Abstract This report presents details of the derivation of stream flows at a number of sites within the Tully Millstream project. The Sacramento Model, which is an explicit soil moisture accounting type model, was used to extend the record of daily stream flow at Queensland Water Resources Commission gauging stations to cover the period 1914 to 1985. These flows were then proportioned to provide estimates at the required locations. Details of the Sacramento Model parameters and calibration and verification statistics comparing recorded and calculated flows, are presented in the appendices. Thomson, J. M. (1955). The movements and migrations of mullet (Mugil cephalus L.). Australian Journal of Marine and Freshwater Research 6: 328-347. Summary - The mullet school (Mugil cephalus L.) has a real entity. The same fish remain associated in a group for a considerable period. Some emigration from and inferentially immigration to) the school takes place. Some schools remain in one locality (within a river system) for some months. Others appear to move more or less continually. A sojourn in fresh water does not appear to be essential though many fish are found there. It is impossible to generalise about age preferences for salinity. Fish of all age groups can be found at all times of year from fresh water to the lower saline estuaries. Some seasonal difference in the direction of movement is evident in Moreton Bay, Queensland but this movement lacks the persistence of the seaward spawning migration of adult fish in late summer and autumn. There is some evidence to support the hypothesis that the majority of mature fish do not migrate every spawning season, but at greater intervals. Thomson, J. M. (1957). The penetration of estuarine fish into freshwater in the Albert River. Proceedings of the Royal Societv of Oueensland 6: 17-20. Abstract not available. Tobin, R. K. (1981). Leaf Litter Degradation by Macroinvertebrates in a Tropical Rainforest Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. Abstract The effects of flood availability and palatability on the colonization and community processing of leaf litter were examined in an upland tropical rainforest stream (Yuccabine Ck, Queensland) and under controlled laboratory conditions.Pattems of litterfall and stream discharge associated with wet and dry seasonal regimes control the amount of allochthonous material accumulating on the stream bed. Surface and bottom litter accumulations were found to differ fundamentally in the microclimatic conditions and state of the leaf material that were offered to the detritivore community. A succession of invertebrate colonization of leaf packs was controlled by the rate and degree of processing and the behaviour of the colonizers. Variation in breakdown of individual leaves in field and laboratory investigations was attributed to differences in the chemical composition of the leaves themselves. Food quality rather than quantity may be expected to limit growth and production of detritivore communities within the stream. Treneny, M. (1988). The Ecology of Tadpoles in a Tropical Rainforest Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. 65 pp. Abstract This study investigated the ecology of four co-occurring tadpoles (Nyctimystes dayi, Litoria nannotis, Litoria serrata and Muophyles schevilli) in a rainforest stream. Temporal and spatial patterns of abundance, development and resource use were determined for each species. An experiment was used to investigate the effects of habitat and competition on the growth of L. serrata and N . dayi. Abundances of three species declined after the wet season. One species (M.schevilli) maintained reasonably stable abundances throughout the study. One species (L. serrata) which declined in winter showed a marked increase in abundances before the wet season in spring, with the entry of recruits into the population. Development was arrested in Winter in all species: each species was confined to a small range of body sizes and development stages. Growth continued at a slow rate at this time. All species showed evidence of very lengthy tadpole life-spans. Alga and detritus were the major food materials of three of the species. One . species (M. schevilli) was less general in food type consumed, feeding mainly on detritus. Little change was observed in dietary composition between the wet season and dry season tadpoles with arrested development. Significant dietary overlap was found between all species pairs. From experiments it was found that a riffle species (N.dayi) and a pool species (L. serrata) performed poorly in opposite habitats. It was deduced that both habitat and competitive effects influence the distribution of these species. Turner, P.A. (1991). The Impact of Short-term Fish Predator Introduction on Stream Pool Invertebrate Communities. B. Sc. Hons. Thesis, Griffith University Brisbane, Queensland. 9 1 pp. Abstract A contemporary theme in stream ecology is that of the interaction between abiotic phenomena and biotic interactions. It was hypothesised that pool environments, during periods of reduced flow, may provide a physically benign habitat for a fish predator, Mogurnda adspersa, to significantly affect stream invertebrate communities. Fish were added to several pools along a small first order stream that drains into Stony Creek, Conondale Ranges, south-east Queensland. Several fishless pools acted as controls. Two experiments are detailed in this dissertation; one carried out during a period of low, continuous flow, and the other during a severe drought. No significant impact by Mogzu-nd~on the density of any taxon or community attribute (e.g. diversity) was detected in the second experiment, although some replicates were lost due to evaporation. In contrast, results from the first experiment suggested that fish detrimentally affected conspicuous taxa such a Paratya australienesis and Synlestes sp.; the size distribution of Tasrnanocoensis sp.; and overall Community Dominance. Laboratory studies suggested that Paratya sp. reduce their degree of movement and increase their use of refuges when in the presence of Mogurnda. Thus, some of the apparent reduction in density of Paratya sp. in the field may have been due to shrimps shifting their spatial distribution to more inaccessible regions in the pools. Dewatering of the pools in the second experiments emphasised the ovemding influence that disturbance can have on stream invertebrate communities. The potential for fish predators to have an impact on invertebrate populations and community structure is likely to be mediated by the intensity and frequency of discharge fluctuations, refuge availability, prey turnover rates, prey morphology and behaviour. Watson, J. A .L., A. H. Arthington and D. L. Conrick (1982). The effect of sewage effluent on the dragonflies (Odonata) of Bulimba Creek, Brisbane. Australian Journal of Marine and Freshwater Research 33: 517-528. Abstract The adult dragonfly fauna and the larval fauna and abundance decrease markedly immediately downstream of the outfall from the Mimosa Sewage Treatment Plant into Bulimba Creek. The adult fauna is substantially restored farther downstream, but the larval fauna and abundance are not. Of the 36 species of Odonata observed at Bulimba Creek, the 10 abundant, essentially s t r e d w e l l i n g species were most affected by the sewage effluent. Adults of only one of these stream species were found at the most contaminated site, and then only in very low numbers; those of two others were not observed downstream of the outfall. The diversities of both adult and larval dragonfly faunas give a qualitative indication of water quality. Parallels between the distribution or abundance of Odonata and the concentrations of contaminants indicate that chlorine may be the most important toxicant immediately downstream of the sewage outfall in Bulimba Creek. Watter, R. (1980). The Effects of Organic Pollution on Aquatic Macrophyte Distribution, Abundance and Diversity in the Pools of an Urban Creek. M. Sc. Thesis, Griffith University, Brisbane, Queensland. Abstract Physicochernical analysis of a 9km stretch of Bulimba Creek, Queensland revealed that the creek was heavily organically polluted immediately below the discharge from the Mimosa Creek sewage treatment plant. Recovery from the pollution load began approximately 2km below the discharge although the I creek had not fully recovered within the study area. The creek upstream of the discharge was not polluted, but was moderately enriched with nitrogen and phosphorus. The study shows that aquatic macrophytes are potentially useful tools in biological surveillance if patterns of abundance, diversity and distribution are carefully interpreted with respect to the prevailing ecological conditions, and if account is taken of the number of species expected in a comparable 'clean' area. Knowledge of the tolerance or sensitivity of the species to organic pollution is necessary. When the water quality of Bulimba Creek was assessed using aquatic macrophytes, the relative pollutional status of the sites as determined by biological criteria did not differ from the status revealed by phy siochemical analysis. Whelan, B. R. (1977). Nutrient levels in the Walsh and Barron Rivers draining agricultural catchments in north Queensland. The Hvdrolo~vof Northern Australia: Hvdroloev Svm~osium.Brisbane, Queensland. pp. 192-193. Abstract This preliminary study was initiated to determine the influence of fertilizer leaching and runoff from agricultural and pastoral land on the Walsh and Barron Rivers in north Queensland. The survey indicates that agricultural production increases nutrient loads but are offset by the large volumes of flow. One of the critical areas identified is fertilizer and water management. Currently there is a large loss of plant nutrients and sediments out of the catchment which can only be to the detriment of continued agricultural production. Whitehead, M. (1985). Ecology of the Purple-Spotted Gudgeon Mogurnda adspersa (Castelnau) (Pisces: Eleotridae) in a Tropical Upland Rainforest Stream. B. Sc. (Hons) Thesis, James Cook University, Townsville, Queensland. 93 pp. Abstract A study in a tropical upland rainforest stream examined the ecology of the small eleotrid Mogurnda adspersa. Relative abundance, patterns of habitatuse, and movement patterns appeared to be related to the seasonal fluctuations in water levels. Fish moved to deep pools and aggregated around refuge sites during the dry season. Growth was described by the Von Bertalanffy equation. Gut contents analysis indicated that microcrustaceans and chironomids were of particular importance in the diet of small fish, while large fish, ephemeropteran nymphs (especially Atalophlebioides and Atalonella) were of greatest importance. Both diet and seasonal variation of composition of the diet were observed for small fish but not for large fish. Microcrustaceans were only important in the diet of small fish during March and April. In following months, chironomids assumed dominance. Field experiments designed to investigate the influence of differing densities of M. adspersa on invertebrates suggested that the fish was not important in structuring the invertebrate community; further investigation in this area is required. Summarising these results, it was concluded that the seasonal nature of Yuccabine Creek is of paramount importance in determining the distribution and abundance of M. adrpersa. Woodall, P. F. (1985). Waterbird populations in the Brisbane regions, 1972-83, and correlates with rainfall and water heights. Australian Wildlife Research 12: 495-506. Abstract Mean numbers and annual variation of 25 species of waterbirds from the Queensland Ornithological Society's records of the Brisbane region during 1972-83 are presented. Changes in the numbers of many species show significant negative correlations with changes in the Moreton winter rainfall and with changes of inland rainfall. Correlations with Moreton dam levels were also examined. Numbers of some species decreased and others increased during the survey period. Coastal and inland distribution of some species is also presented. Wright, A. D. (1987). A Basis for Integrating Biological and Chemical Controls of Water Hyacinth Eichhornia crassipes (Mart.) Solms. M . Phil. Thesis, Griffith University, Brisbane, Queensland. 269 pp. Abstract The water hyacinth is a major weed of freshwaters in the tropics and subtropics of Australia and several other counties. As part of a biological control program against the weed in Australia, stocks of two insect biological control agents, Neochetina eichhorniae Warner (Coleoptera: Curculionidae) and Sameodes albiguttalis (Worren) (Lepidoptera: Pyralidae), were obtained from the United States Department of Agriculture (USDA). The insect species were later widely liberated and became established. Research by USDA personnel led to suggestions that the insects would enjoy a synergistic relationship and that the moth would be the more effective agent. Neither of these expectations was fulfilled. Early field observations in Australia suggested that the insects may be sensitive to changes in plant quality, in particular to one component of leaf quality, hardness. The research program described in this thesis developed from this hypothesis. Yezdani, G . H. (1986). An ecological study of the Albert and Logan River systems, southeastern Queensland. Queensland Institute of Technology, Brisbane, Queensland. 111 pp. plus Appendix. Abstract This document reports on a study of the Albert and Logan River systems within the Shires of Albert and Beaudesert, southeastern Queensland. The study programme was designed to establish baseline data on the distribution and ecology of the aquatic fauna and flora of the region, and to monitor major changes in the physical, chemical, and biological water characteristics for a period of 12 months. It identifies factors which may contribute towards increased production of aquatic organisms, and survival and reproduction of the heterotrophic bacteria, Vibrio cholerae. The sites involved are described. Physicochemical features considered are water temperature, dissolved oxygen, pH, ionic composition, salinity, etc. The river flora considered include phytoplankton, aquatic macrophytes and epiphytic and toxic algae. River fauna considered include Protozoa, zooplankton, microcrustacea, the benthic macroinvertebrate fauna and fish. 3.0 STREAM AND RIVER RESEARCH IN PROGRESS This section of the bibliography presents summaries of research projects in progress at the Centre for Catchment and In-stream Research, Griffith University and the Australian Centre for Tropical Freshwater Research, James Cook University. It provides, where possible, an abstract of each publication in press and in preparation, and descriptions of studies in progress. All studies listed have relevance to the themes of stream fauna, stream ecology, stream condition and biological approaches to assessing condition and disturbance in streams. 3.1 3.1.1 CENTRE FOR CATCHMENT AND IN-STREAM RESEARCH Stream Invertebrate Studies Several CCISR research projects include aspects of benthic macroinvertebrate community structure in streams, and the effects of various microhabitat and water quality factors on community organisation, life history and dispersal strategies, responses to the flow regime and to flooding and dam construction. Experimental studies have been conducted in an artificial stream system located at Atkinsons Dam, and in the field using various manipulative techniques. Field investigations have been conducted in the Brisbane, Stanley,Mary and Burnett River catchments, South-east Queensland, and in the Tully-Millstream system of north Queensland. One objective of these studies has been to assess various methods for biological monitoring of stream condition using the macroinvertebrate community. Arthington, A. H., D. L. Conrick, and J. Zalucki (in prep.). The macroinvertebrate fauna of Barker-Barambah Creek, Murgon, in relation to water quality, the flow regime and downstream effects of dam construction. Abstract A two year has been undertaken of the aquatic invertebrate fauna at nine sites in Barker-Barambah Creek, S E Queensland. The macroinvertebrate fauna of this system is described and compared with the fauna recorded in streams of the Brisbane Region. Spatial and temporal variation in invertebrate communities is related to physico-chemical parameters of water quality and microhabitat in the streams. The study compares patterns in invertebrate communities generated by analyses of data derived by three sampling methods (Surber, kick and dip net sampling) and by Surber sampling alone. It also examines the sensitivity of various invertebrate taxa and levels of taxonomic resolution to water quality differences among sites and to flooding and flow regulation (See Environmental Study of Barker-Barambah Creek, Volume 2. Scientific Report: Water Quality, kquatic Ecology and Water Allocation Strategy, Chapter 15). Arthington, A. H. and B. J. Pusey (in prep.). The aquatic macroinvertebrate communities of tributaries of the Brisbane and Stanley Rivers, South-east Queensland. Abstract This paper describes the aquatic macroinvertebrate communities of three tributary streams (East Brisbane River, West Brisbane River and Stony Creek), excluding larval chironomid midges. Spatial and temporal variation (over 2 years) in assemblage structure is examined in relation to physicochemical parameters of water quality, stream microhabitats and catchment land use. The report compares patterns in macroinvertebrate communities generated by analysis at various levels of taxonomic organisation (e.g. species, genus, sub-family, family) and discusses the utility of these approaches in assessing water quality and other site differences by biological means. Arthington, A. H. and B. J. Pusey (in prep.). Leaf litter decomposition in artificial streams systems receiving pulsed and chronic applications of Chlorpyrifos. Journal of Environmental Cbntarnination and ~ o & o l oey, a. Abstract This paper describes the results of experiments conducted in the artificial stream system in which the rates of decomposition of leaf litter packs were monitored prior to and after pesticide treatments. Little change in decomposition rates was observed when the pesticide was applied as a 6-hour ) high dose (5.0 pulse, and no differences between low dose (0.1 u g . ~ - l and u g . ~ - l )were observed. Decomposition was retarded at both concentrations when pesticide application extended over 20 days. Data on the effect of chlorpyrifos on microbial fauna associated with decomposing leaves are also presented. The findings of this study have implications for interpreting and predicting the effects of pesticides on leaf litter processing and hence energy flow in streams. Arthington, A. H., B. J. Pusey and P. Cranston (in prep.). Chironomid midge larvae of tributaries of the Brisbane and Stanley Rivers, South-east Queensland. Abstract A twelve month study has been undertaken of the larval chironomid midge fauna at eleven sites in three tributaries streams (East Brisbane River, West Brisbane River and Stony Creek). The fauna was sampled by kick sampling and Surber sampling. Spatial and temporal variation in assemblage structure was related to physico-chemical parameters of water quality and microhabitat in the streams. The study compares patterns in midge communities generated by application of the two sampling methods and discusses the utility of these approaches in assessing water quality and other site differences biologically. Bunn, S. E. (in progress). Life history and behavioural responses of stream invertebrates to disturbance. Abstract Stream communities are greatly influenced by disturbance resulting from extreme discharge events. Although the frequency and intensity of these events is important, the predictability of disturbance will influence the evolution of behavioural and life history strategies. The behavioural and life history response of stream invertebrates to discharge related disturbance are being examined in this study. This information will lead to a better understanding of how stream communities respond to disturbance and make a substantial contribution to our knowledge of the ecology of subtropical streams, as well as contributing to the management of flow-regulated rivers. Conrick, D. L., A. H. Arthington and J. Zalucki (in prep.). The mayfly (Ephemeroptera) fauna of Barker-Barambah Creek, Murgon, and the utility of this group in biological monitoring. Abstract This paper describes the spatial and temporal variation in mayfly communities in Barker-Barambah Creek, South-east Queensland. The fauna was sampled by kick and Surber sampling and by dip-netting and related to physicochemical parameters of water quality and microhabitat in the streams. The study compares patterns in mayfly communities generated by application of all three sampling methods and by Surber sampling alone. It discusses the utility of these biological approaches in assessing water quality differences among sites and the effects of flooding and flow regulation. A new species of mayfly was recorded in Barambah Creek. See Environmental Study of Barker-Barambah Creek, Volume 2. Scientific Report: Water Quality, Aquatic Ecology and Water Allocation Strategy (Chapter 15). Hughes, J. M. and S. E. Bunn (in progress). Estimating dispersal among populations of stream invertebrates using allozyme data. Abstract Knowledge of the extent of gene flow enables determination of the degree of exchange of breeding individuals among populations. Limited movement of -these individuals may reduce the resilience of populations to natural and anthropogenic disturbances and ultimately lead to their extinction. Gene flow among populations of stream invertebrates is likely to be limited because of their generally poor dispersal ability and the presence of real barriers between drainage systems. This project aims to establish the extent of gene flow among conspecific populations within and between drainage basins. This infomation will contribute to the management of streams for the maintenance of natural values. Hughes, J. Me, S . E. Bunn, D. A. Hurwood and M. Kingston (in prep.). Gene flow and dispersal in stream invertebrates. Abstract Many stream insects have both an aerial and aquatic phase in their life history. The relative importance of aerial to aquatic dispersal has seldom been questioned, even though some species have extremely short adult lives. Other species are more likely to disperse only via the stream as they have no terrestrial stage in the life history. This project explores the idea that the degree of differentiation among populations can indicate the degree of dispersal between them. The shrimp, Parazya aurtraliensis, was chosen as the first species to investigate because dispersal by the stream was assumed and . the results could be used for comparison with other species with unknown dispersal mechanisms. Sampling was carried out in 1990 and 1992 in two adjacent catchments, one on either side of the Connondale Ranges, South-east Queensland, each of which consists of two subcatchments. Almost no temporal variation in gene frequencies was observed. The amount of spatial variation within and between subcatchments was extremely large, with Fst values greater than 0.5 in some cases. The use of this species as a model for later comparisons is discussed. Hughes, J. M. and D. A. Harrison (in prep.). Effects of long-term exposure to chlorpyrifos on genetic variation in the freshwater shrimp Paratya alcstraliensis. Abstract Limited information exists on the effects of pesticide pollution on genetic variation within populations. It is expected that low levels of pollution may act as selective agents to remove or decrease the frequency of certain genotypes in a population. This may affect the ability of that population to adapt to future changes in the environment. Such effects may be more pronounced in long-term experiments than in laboratory bioassays because both mortality and differential reproduction between genotypes may affect genotype frequencies. This study used artificial ponds to examine the longterm effects of pollution on genetic variation at four enzyme loci in the freshwater shrimp. Cellulose acetate electrophoresis was used to identify variation at four variable enzyme loci, Pgi, Pgm, Mpi and Pep C and to compare genetic variation among ponds before and after application of pesticide. Hughes9J. M. and D. A. Harrison (in prep.). The effects of long-term exposure to sub-lethal levels of chlorpyrifos on growth and reproduction in the decapod crustacean Macrobrachium sp. Abstract Little is known of the sublethal effects of pesticides on stream fauna, especially invertebrates. This study has examined the effects of long-term exposure to sub-lethal levels of chlorpyrifos on growth and reproduction in the decapod crustacean Macrobrachium sp. A series of 12 artificial ponds was set up, stocked and monitored for 12 months. Four remained as controls, four were given a low dose treatment and four a higher dose of chlorpyrifos. They were monitored for a further nine months. Every month, a sample was taken from each pond and each animal was scored for size class and reproductive condition. This paper will describe differences in age structure and reproductive condition among the three treatments. Kerby, B. M. and S. E. Bunn (in prep.). Factors influencing invertebrate drift in small forest streams, South-East Queensland. Australian Journal of Marine and Freshwater Research. Abstract Aspects of invertebrate drift were investigated in four small rainforest streams in south-east Queensland. Hourly drift sampling in two streams revealed low drift rates and no distinct die1 patterns throughout the dry season. The drift during this period was dominated by Simuliidae, Chironomidae and to a (Caenidae: Ephemeroptera) and Chewnatopsyche lesser extent Tasma1~3coenis (Hydropsychidae: Trichoptera). Additional studies were undertaken to examine why some individuals of particular taxa drift while others (of the same taxa) remain in or on the substratum. Analysis of the relative gut fullness of Simuliidae and Chironomidae showed that a higher proportion of non-drifting individuals had full or near full guts than those in the drift. Hungrier individuals of these two taxa may enter the drift as a food searching mechanism. An analysis of limb loss of hexapod nymphs indicated a disproportionate number of individuals in the drift had one or more limbs missing compared with those that remained in the benthos. Such injured individuals may not be able to resist dislodgement from the substratum during periods of activity. Pusey, B. J., A. H. Arthington and T. J. Flanders (in review). An outdoor replicated artificial stream system: design, operating conditions and initial invertebrate colonization. Journal of Environmental Contamination and Toxicoloey, Abstract This paper describes the design and operating conditions of a replicated artificial stream system for experimental investigation of the effects of pesticides on stream invertebrate communities and important processes in stream ecosystems. The artificial stream system consists of six channels equipped with notch weirs for the control of depth and flow velocity. The water quality characteristics and initial colonisation of the streams by invertebrates is described and the utility of the stream system for experimental analysis of stream processes is discussed. Pusey, B. J., A. H. Arthington and J. McLean (in review). The effects of an insecticide, Chlorpyrifos, on macroinvertebrate communities in an outdoor artificial stream system. Journal of Environmental Contamination and Toxicoloey, Abstract The results of a 250 day experiment examining the effects of a pulsed application of two levels (0.1 ugL-l and 5.0 U ~ L - ' )of chlorpyrifos on macroinvertebrate communities are presented. No effects of the low dose treatment were observed. The high dose treatment resulted in an initial depression of invertebrate densities, particularly for some species of Chironomid midge larvae. These effects were relatively transitory and invertebrate communities in treatment streams were indistinguishable from those in control streams 38 days after application of the pesticide pulse. The implications for setting water quality criteria for chlorpyrifos in particular and pesticides in general are discussed, as well as the implications for the design of biological monitoring programs using stream invertebrates. Pusey, B. J., A. H. Arthington and S. Ward (in prep.). The effects of chronic application of Chlorpyrifos on invertebrate communities in an outdoor artificial stream system. Journal of Environmental Contamination and Toxic010 rrv. Abstract This paper describes the results of an experiment in which chlorpyrifos was applied to the artificial streams at concentrations of 0.1 ugL- and 5.0 u g ~ - l for 20 days. Major changes to the invertebrate fauna were observed in all treatment streams, even for low rates of pesticide application. The implications for setting water quality criteria for chlorpyrifos are discussed, as well as the implications for the design of biological monitoring programs using stream invertebrates. 3.11.2 Fish Community Studies CCISR research projects on fish community structure in Queensland streams and rivers can be grouped into three categories: (1) Fish assemblage smcture and the influence of water quality, habitat, the flow regime, competition and predation in regulating species composition and age structure; (2) Distribution, ecology and conservation of rare and endangered species; and (3) Distribution, ecology and management of exotic species. One objective of these studies has been to assess the significance of stream habitat in regulating fish community structure and thereby to develop an ecological basis for stream habitat assessment and stream habitat management. Arthington, A. H. and C. J. Marshall (in prep.). Distribution and habitat requirements of the vulnerable Honey Blue-eye (Pseudomugil mellis), the endangered Oxleyan Pygmy Perch (Nannoperca oxleyana) and the Ornate Rainbowfish (Rhadinocentrus ornatur) in South-east Queensland. Abstract This paper reports on the distribution, relative abundance and broad habitat preferences of the Honey Blue-eye, the Oxleyan Pygmy Perch and the Ornate Rainbowfish in South-east Queensland. It maps the distribution of each species on the mainland and dune islands of this region and examines patterns in fish assemblage structure among Fraser Island lakes in relation to physicochemical features of the waterbodies and their spatial relationships. The conservation status of each species is assessed in terms of its distribution, rarity, relative population abundance, habitat niche and the degree of protection afforded to significant sites by different categories of conservation reserve in South-east Queensland. Options for conservation of the three species are presented. Arthington, A. H. and C. J. Marshall (in prep.). Distribution, diet and habitat preferences of the vulnerable Honey Blue-eye (Pseudomugil mellis), the endangered Oxleyan Pygmy Perch (Nannoperca oxleyana) and other endemic species in the Noosa River, South-east Queensland. Abstract This paper demonstrates that the Honey Blue-eye and Oxleyan Pygmy Perch share habitat in the main channel of the Noosa River, whereas the Ornate Rainbow fish is confined to tributaries, possibly as a response to piscivores. The Honey Blue-eye and Oxleyan Pygmy Perch partition food resources within their preferred habitat, shallow beds of Eleocharis sedges. In the case of P. mellis, low dietary overlap with Oxleyan Pygmy Perch and other endemic species is largely due to the Blue-eye's distinctive diet, in particular the significant consumption of algae, especially desmids and diatoms (5070% of mean population diet). Other species do not utilise this food resource. The potential for interspecific competition as an agent regulating the success of the Honey Blue-eye and Oxleyan Pygmy Perch in the Noosa River is discussed. Bluhdorn, D. R. and A. H. Arthington (in review). Distribution and population characteristics of the introduced cichlid, Oreochromis mossambicus (Pisces: Cichlidae), in the Gascoyne-Lyons river system, Western Australia. Australian Journal of Marine and Freshwater Research Abstract The introduced cichlid, Oreochromis mossambicus has become established in the Gascoyne-Lyons River System, Western Australia. In less than 10 years, 0.mossambicus has colonised almost the entire length of the system, extending 350 km inland. The range expansion achieved in this arid environment demonstrates the invasive abilities of 0. mossambiclcr and the potential threat to other Australia waterways in tropical and sub-tropical regions. Bluhdorn, D. R., A. H. Arthington, S. Hamlet and S. Dunlop (in progress). The effects of flow regulation in Barker-Bararnbah Creek. Abstract Stage 2 of the Environmental Study of Barker-Barambah Creek includes a range of water quality and ecological studies designed to assess the effects of flow regulation and to develop management options for the system and its catchment, with particular reference to management of releases from the Bjelke-Petersen Dam. Results and final reports are due in June 1993. Kennard, M. J. and B. J. Pusey (in prep.). Fish assemblage structure and resource use in tropical floodplain lagoons of the Normanby River, Cape York, Australia. Abstract Fish assemblages were sampled in eight floodplain lagoons of the Normanby River shortly after they had been inundated by floodwaters and again just prior to the resumption of the wet period. Fish communities were sampled by electrofishing and gill netting; habitat structure and complexity, physicochemical characteristics and the food resource base of each lagoon were quantified. Assemblage structure changed markedly between the two sampling periods due to recruitment processes and variable levels of predation, apparently related to changes in habitat complexity. Habitat complexity was not an important predictor of assemblage structure at the beginning of the study and it appeared that assemblage structure was more a matter of random processes when vast areas of floodplain not just lagoons were inundated. The role of habitat complexity in determining assemblage structure increased as the size of lagoons decreased with progression of the dry season. Kennard, M. J. (in progress). The effects of predation and habitat complexity on fish assemblage structure and resource use in experimentally manipulated floodplain lagoons of the Nomanby River, Cape York, Australia. Abstract In order to test some of the hypotheses formulated by the results of the research described in Kennard and Pusey (in prep., above), the density of predators and habitat complexity (refuge from predation) were manipulated in eight lagoons of the Normanby River. Assemblage structure, changes in growth rates, habitat preferences and resource use of the various species are being monitored over the period of the experiment (nine months). Pusey, B. J. and A. H. Arthington (in progress). Regional patterns of discharge regime within rivers of Queensland with particular reference to discharge events of relevence to the aquatic biota. Abstract The discharge patterns of major easterly flowing Queensland rivers were examined and several important parameters quantified to enable a regional classification of discharge regimes. Colwell's predictability analysis was used to quantify the predictability of mean monthly flow, instantaneous monthly maximum and minimum flow and the monthly ratio of maximum to minimum daily flows. In addition, several parametric measures of variability were also used. In general predictability analysis was superior in its ability to detect regional patterns although the two approaches can be said to be examining different process and can therefore have their own value. Major differences were found between rivers of Cape York, those of the Atherton Tablelands, those of the Burdekin and Fitzroy drainage systems and those of southeastern Queensland. Rivers of the north of the state were more predictable although this predictability was not necessarily derived from the same sources. For example Cape York rivers were predictable because of the strong seasonal signal whereas the Mulgrave and Johnstone Rivers had more constant flows and thus were also highly predictable. Large drainage systems had their own regional differences in predictability depending on latitude and distance from the coast. Rivers of south-eastem Queensland tended to be the least predictable as they frequently received both a summer and a winter rainfall but not necessarily in the same year. i Pusey, B. J., A. H. Arthington and M. G. Read (in prep.). Spatial variation in fish assemblage structure of two rivers of the Wet Tropics area of North Queensland: the Mulgrave and South Johnstone Rivers. Abstract The fish assemblage structure, diet and dietary overlap and habitat preferences of individual species were examined at 22 sites in the Mulgrave and South Johnstone Rivers. Diversity was highest in the Mulgrave River and appeared to be due to an absence of physical baniers to fish movement and a lessened impact of agriculture in this system. Dietary overlap was high for most species indicating that competition for food resources could be important in structuring communities. Habitat preference data, however, indicated that this resource was more strongly partitioned than food, and this partitioning may ameliorate the effects of high dietary overlap. Strong spatial differences in assemblage structure were evident in both rivers with several zones of species replacement. Range extensions for several species are reported, particularly for rare species. Pusey, B. J., A. H. Arthington and M. G. Read (in prep.). Spatial and temporal variation in fish community structure in the Albert River, South-east Queensland. Abstract The results of a three year study of fish assemblage structure in which fish assemblages were sampled once a year at nine sites are presented. Major spatial differences in assemblage structure and only minor temporal variation were observed. Temporal variation was most pronounced at downstream sites which appeared to most heavily affected by agriculture. Assemblages characteristic of headwater streams were closely correlated with substrate and flow related differences. Habitat preference data were also examined and an attempt made to use these data in conjuction with habitat structure data to predict relative species densities. The results are discussed with reference to the Mary River study (see below) Pusey, B. J., A. H. Arthington and M. G. Read (in prep.). Fish assemblage structure in the Burdekin River: the influence of habitat, floods and variable recruitment. Abstract Seasonal and between-year variation variation in discharge was found to be an extremely important determinant of changes in fish assemblage structure in the Burdekin River. Although habitat was a factor in determining the composition of the fish assemblage, variable recruitment, which was dependent on the intensity of the summer wet season, was found to most strongly affect composition. The absence of a strong habitat effect was due to r a low diversity of habitats within the river with very little change over the entire river length in either habitat structure or fish assemblage composition. Habitat appeared important however in determining the strength of recruitment after the primary effect of flood strength had been taken into account. High discharge events did not greatly influence assemblage composition through the physical removal of individuals. Pusey, B. J., A. H. Arthington and M. G. Read (in prep.). Habitat preferences of freshwater fish of Queensland. Abstract Habitat preferences for over 40 species of fish are detailed. Where sample sizes are large enough temporal and spatial variation in preference is also examined. Many species have very plastic habitat requirements and showed little preference for particular habitats. These species, in general, have wide geographical distributions and are rarely limited to particular parts of drainage basins, i.e. headwaters or lower reaches. A few species have very defined habitat preferences and these were generally of limited distribution both geographically and within drainage systems. The importance of cover is high for a large number of species particularly those of small body size. Some data on physico-chemical tolerances are also presented. Pusey, B. J., M. G . Read and A. H. Arthington (in prep.). Spatial and temporal variation in fish assemblage structure in the Mary River, South-east Queensland: the influence of community structure. Abstract The results of a 15 month study of fish assemblages at 11 sites throughout the Mary River drainage system are presented. Major spatial differences were apparent and considerable temporal change in assemblage structure also occurred. Differences in assemblage structure were correlated with habitat parameters such as substrate type, stream width and the presence of cover. Discriminant functions analysis was used to test for habitat differences between assemblage groups defined by ordination and classification. A model was developed in which various aspects of habitat were used to identify assemblages using depth, flow, substrate, cover and physicochemical parameters. Using all of these variables allowed a 100%successful descrimination between groups. Cover tended to be the most powerful variable for descrimination and at most sites, temporal variation in assemblage structure could be correlated with the abundance of aquatic macrophytes. Pusey, B. J., M. G. Read and A. H. Arthington (in prep.). Fish assemblage structure in three rivers of Cape York Peninsula, Australia. Abstract The results of surveys on the Pascoe (three sites), Stewart (five sites) and Noxmanby Rivers (eight sites) are presented. Spatial variation, both within and between rivers, was pronounced and to a large degree related to differences in habitat structure. Dietary analyses were undertaken for all the species collected in the study. Comparisons of dietary overlap be tween species at different sites revealed that the potential for competition to be important as a structuring agent varied between rivers. Predation was also found to be potentially important in structuring fish assemblages. Pusey, B. J., M. G. Read and A. H. Arthington (in prep.). Diet, dietary overlap and species interactions of fish assemblages of the Burdekin River, Queensland. Abstract Fish assemblages at fourteen locations within the Burdekin and Bowen River drainage systems were sampled in both the wet and dry periods for three years to investigate spatial and temporal variation in dietary preference and the strength of interspecific interactions. The hypotheses tested were that partitioning of resources should be evident given the pronounced predictability of the flow regime in this river and that specifically dietary overlap should decrease in the late winter dry period. Some dietary partitioning was evident particularly for closely related species but in general partitioning was not strong. Contrary to the prediction, overlap was lowest during the wet period when food resources were most abundant. A large proportion of species showed a seasonal shift from large aquatic invertebrates and terrestrial invertebrates during the summer months to small aquatic insect larvae during the summer. Macrophytes and filamentous algae were surprisingly, an important component in the diets of many species, particularly during the dry period. Pusey, B. J., M. G. Read and A. H. Arthington (in prep.). The diets of Queensland freshwater fish. Abstract This presents the results of dietary gut analysis of over forty species of freshwater fish from rivers extending along the coast from South-east Queensland to Cape York. Spatial, temporal and onto genetic shifts in dietary preference are examined for most species. The results are compared with data from other studies on Queensland fishes. 3.2 AUSTRALIAN CENTRE FOR TROPICAL FRESHWATER RESEARCH The Australian Centre for Tropical Freshwater Research (ACTFR) has established a range of research programs and projects in fields concerned with catchment processes, riparian vegetation, landscape and stream ecology, stream condition, impacts of pollution, imgation discharge and disturbance, and related topics. There is a particular emphasis on the ecology of rainforest streams. Project descriptions are provided together with abstracts of publications under review and in progress. Project Outlines 3.2.1 Alford, R. A. and S. Richards. Experiments and observations on the ecology of tropical frogs, dragonflies and their larvae. Outline The project is investigating two questions: 1. To what extent can the performance of species in complex assemblages be predicted from their interactions in simpler systems? 2. How are competition and predation influenced by the size distributions of interacting species? The answers to these questions are of importance in predicting the behaviour of managed populations of commercially harvested, game, and endangered species. Congdon, R. A., J. Herbohn and C. Maycock. Ecosystem Dynamics of Humid Tropical Rainforest. Outline This study aims to document hydraulic and nutrient budgets in a humid tropical rainforest catchment, by measuring fluxes in bulk precipitation, throughfall, streamflow and litterfall. Nutrient stocks in vegetation and losses in streamflow are also being determined. Congdon, R. A. and G. Lukacs. Effects of irrigation drainage on the Barrattas Wetlands (Burdekin Imgation Scheme). Outline This study aims to determine the present levels of nutrient inputs in the surface water draining into the wetlands which receive imgation discharge from the Burdekin Imgation Scheme, and to monitor changes such as increased algal looms, resulting from this run-off. It will have general applicability to the understanding of effects on water quality, and wetlands, of waters draining agricultural lands (cane fields, rice fields, feed lots, etc) in the seasonal tropics. Pearson, R.G. Burdekin River Ecology Project. Outline Following previous descriptive studies of the river an its biota, a pilot project was initiated to examine the feasibility of using stable isotope methodology to study organic inputs and processing in the river. Preliminary results indicate that the methods have some potential success. Pearson, R. G. and P. Clayton. The Effects of Dunder Disposal on Stream Water Quality. Outline The Australian Centre for Tropical Freshwater Research is undertaking a twoyear intensive study and a long-term monitoring program to assess the effects, if any, of dunder disposal on stream water quality and animal community composition. In previous studies it was found that the aquatic fauna provided an ideal monitoring mechanism for water quality, and it is intended to utilise a similar system in the present study. The initial approach has been to examine a large number of stream sites (>70)both within and outside the cane growing area many of these have been used for water quality and faunal sampling and the results of this work are currently being analysed using various statistical procedures. During the course of these analyses the exceptional rainfall of the 1990-91 wet season caused severe flooding in all the study streams. This has been fortuitous as it has provided as complete a flushing of the systems as possible, re-setting stream conditions, and facilitating the monitoring of developments through the full seasonal cycle. The number of sampling sites will be reduced subsequent to a second post-wet season survey, for more intensive studies and for subsequent long-term monitoring. Preliminary results indicate that it is possible to discriminate between streams affected by different agricultural regimes, including irrigation, but it is too early to determining whether or not there are measurable effects due to dunder alone. The study will continue in its intensive phase through 1992, following which a less intensive long-term monitoring program of key sites will be implemented. Pearson, R. G., R. M. St. Clair, L. J. Benson, P. Clayton and J. Nolen. Rainforest Stream Ecology. Outline This study consists of several inter-linked projects which together form a program of research into the community ecology of pristine forests streams. Current work includes a long-term study on the dynamics of the invertebrate community and of organic material in the stream, on litter processing by major shredders, on the population dynamics of important species, and on the ecology of waterfalls. Publications in press and in review are listed below. Pearson, R. G., R. M. St. Clair and D. Kwan. Classification of Rainforest Streams. Outline A classification of streams in the Wet Tropics of Queensland World Heritage Areas is being undertaken on the basis of their invertebrate communities, and in relation to instream and landscapes variables. The intention is to provide the basis for future stream monito6ng, in particular to enhance manigement capabilities in the region. 3.2.2 Publications in Progress Benson, L. J. and R. G.Pearson (in review). Litter inputs to a tropical Australian rainforest stream. Aust. J. Ecol. Abstract Vertical litterfall and lateral litter movement were monitored in the riparian zone of Birthday Creek, a small upland rainforest stream in north Queensland, from June 1987 to May 1990. Total litterfall (mean = 484 gm me* yrl) was low in comparison with other tropical sites, both within Australia and elsewhere. Litterfall was distinctly seasonal, with maxima occurring in the late dry season (Oct. - Nov.) and minima in winter (June - July). Tropical storms caused short-term increases in litterfall, especially the small wood fraction. Overall, laterally transported litter contributed 6-8% of the total litter input. Lateral movement varied according to the bank slope and microtopographic features and was not related to wind. Nitrogen and phosphorus content of leaves were low (mean N = 1.26%, P = 0.029% by weight). Nitrogen content of laterally transported leaves was overall about 19% higher than that of leaves falling directly into the stream. Pearson, R. G., K. R. Hortle and R. E. W. Smith (in review). The fauna of the Annan River, North Queensland with reference to the impact of tin mining. 11. Macroinvertebrates. Australian Journal of Marine and Freshwater Research Absmct The riffle fauna of the Annan River system, in northern Queensland, was sampled in May and October 1982. The river had a strong sesonality of discharge and was subjected to sedimentation due to small scale alluvial tin mining on some tributaries. Maximum density of animals was 4220 m-2 in October. The number of species recorded from five kick samples (total of 0.5 m -2) varied from 27-47 in May and 33-60 in October. The total number of species recorded from all sites was 148 from 110 kick samples. At the undisturbed sites more than 48% of the fauna and up to 78% of the abundance was accounted for by four species, Atalophelbia sp., Baetis sp., Chimarra sp. and Cheumatopsyche sp. Sedimentation caused severe depletion of the fauna. Population biology of Australa~astriolara (Decapoda: Atyidae) in a rainforest stream (with R.E.W. Smith). Litter processing by crayfish in a tropical Australian stream (with J. Coughlan). Ecology of dragonflies in a tropical Australian stream (with L. Charlton). Population biology of Mogurnda adspersa in a tropical Australian stream (with M. Whitehead). Community dynamics of the invertebrate fauna of Yuccabine Creek, a tropical rainforest stream The fauna of small streams in the Birthday Creek catchment, tropical north Queensland (with L. Benson). Ecology of the Burdekin, a large seasonal tropical river. I. Major habitats and the biota. Ecology of the Burdekin, a large seasonal tropical river. 11. Community dynamics of the invertebrate fauna. Effects of the hydrologic disturbances on community processes in a small tropical rainforest stream. Experimental assessment of the role of disturbance in the riffle fauna of tropical rainforest streams (with 2. Rosser). A preliminary classification of landscapes, streams and steam biota in the southern Wet Tropics World Heritage Area (with R. St. Clair). A classification of tropical wetlands in the Burdekin floodplain, north Queensland (with R. Congdon, G. Lukacs and J. Nolen). Stream metabolism in Birthday Creek, a small tropical rainforest stream (with R.W. Davies). Leaf litter decomposition in soil and water at Birthday Creek, a small tropical rainforest stream (with R.W. Davies). Rock texture as a determinant of species diversity in a tropical rainforest stream. 4.0 ACKNOWLEDGMENTS I wish to thank Dr Richard Pearson, Dr Brad Pusey, Dr Stuart Bunn and Dr Jane Hughes for providing information on research in progress, Ms Wendy Abbot for conducting STREAMLINE searches and Ms Liz Collins and Mrs Maria Barrett for editing and typing. 4.0 ACKNOWLEDGMENTS I wish to thank Dr Richard Pearson, Dr Brad Pusey, Dr Stuart Bunn and Dr Jane Hughes for providing information on research in progress, Ms Wendy Abbot for conducting STREAMLINE searches and Ms Liz Collins and Mrs Maria Barrett for editing and typing.