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attached - BobWongLab
attached - BobWongLab

... underlie the remarkable diversity that exists both within and between species. One of the most striking examples of this diversity is seen in polymorphic species that exhibit consistent genetic variation in coloration within populations [1–3]. Indeed, studies of such species have provided evolutiona ...
Guidelines for managing the endangered Growling Grass Frog in
Guidelines for managing the endangered Growling Grass Frog in

... management of L. raniformis in urbanising landscapes. Techniques other than occupancy-based surveys are reviewed as a means of prioritising and monitoring habitat management actions, including surveys aimed at establishing the reproductive success of remnant populations, and mark-recapture and radio ...
Gray Ratsnake (Elaphe spiloides) - Registre public des espèces en
Gray Ratsnake (Elaphe spiloides) - Registre public des espèces en

... (e.g. fisher (Martes pennanti), mink (Mustela vison)). Population sizes and trends Due to the secretive nature of snakes, it is extremely difficult to estimate the extent and size of populations accurately. Based on habitat suitability models and density estimates, the Great Lakes/St. Lawrence popul ...
Frogs of the ACT Region
Frogs of the ACT Region

... Call: Like a child’s toy clicker. Frequently repeated ‘crick, crick, crick, crick...’. Its peak breeding season is during winter and early spring, but may be heard at all times of the year. ...
Do plant-community-based grazing regimes lead to
Do plant-community-based grazing regimes lead to

... living animals) attached seeds has not been studied yet and might depend on animal behaviour: we expect that due to greater vibrations of the coat, seed losses are higher during a 3-km inter-area transfer than during the grazing period on a paddock. In this study, the following questions were addres ...
Zooplankton community composition of lakes in
Zooplankton community composition of lakes in

... We analysed associations between zooplankton species composition and local abiotic factors in 30 lakes located along a 900 km south-north transect from Whitehorse (Yukon Territory) to Inuvik (Northwest Territories). The lakes were situated in three broadly defined vegetation zones: (i) Boreal forest ...
article - Aquatic Invasions
article - Aquatic Invasions

... Bustos 2012) are currently restricted to constructed water bodies, it is likely a matter of time before they spread to natural waters also (as has also been the case for D. lumholtzi in North America, and B. triarticulata in Italy). In New Zealand, the Japanese calanoid copepod Sinodiaptomus valkano ...
Perth 2015 - Australasian Wildlife Management Society
Perth 2015 - Australasian Wildlife Management Society

... This volume is a pre-conference compilation of abstracts. The contents have not been peerreviewed and abstracts have been printed as received from submitting authors except for minor editing. In many cases the contents contain preliminary results only. Any advice provided in this publication is inte ...
Representations of the ecological niche
Representations of the ecological niche

... and circle represent the conditions that actually occur at different geographical sites where organisms belonging to the species live. Each V aRa is not empty and can consist of a set of one or more distinct entities, a single numerical value, or value range between given boundaries. In addition, th ...
THE ROLE OF INTRODUCED SPECIES IN THE DEGRADATION OF
THE ROLE OF INTRODUCED SPECIES IN THE DEGRADATION OF

... rebound by the proposed prey species? This type of data is available only for the interaction between the snake and several lizards (6) but positive results constitute strong evidence. Interpretation of negative evidence is limited by the possibility that the experimental removal was carried out for ...
link to thesis - Victoria University of Wellington
link to thesis - Victoria University of Wellington

... local scales, and how these are manifested at larger ones. I conducted further sampling across a set of sites nested within locations over three regions, Juan Fernández Islands (Chile), Northern New Zealand, and Tasmania (Australia), to evaluate patterns of variation in the diversity and composition ...
Definitions, Categories and Criteria for Threatened and Priority
Definitions, Categories and Criteria for Threatened and Priority

... destruction throughout its range in the immediate future, or is already severely degraded throughout its range but capable of being substantially restored or rehabilitated. An ecological community will be listed as Critically Endangered when it has been adequately surveyed and is found to be facing ...
ASPECTS OF HABITAT FRAGMENTATION – ANALYSING A
ASPECTS OF HABITAT FRAGMENTATION – ANALYSING A

... the amount of time spent in the matrix will be larger in a more fragmented landscape, which may increase overall mortality rate and reduce overall reproductive rate of the population (Fahrig 2002). In addition, there are negative edge effects due to species interactions. Probably the most extensivel ...
Meeting the Challenge of Invasive Plants: A Framework for Action
Meeting the Challenge of Invasive Plants: A Framework for Action

... data, and supported this work. Particular thanks to Wildlife Division staff Terry Minzey, Brian Mastenbrook, Sherry MacKinnon, Barb Avers, Ernie Kafkas, John Niewoonder, Michael Donovan, Brian Piccolo, Matt Edson, Doug Pavlovich, Jon Curtis, Julie Oaks, Steve Griffith, John Schafer, and Vern Stephen ...
Tower Hamlets Local Biodiversity Action Plan 2014
Tower Hamlets Local Biodiversity Action Plan 2014

... I am very pleased to adopt the Tower Hamlets Local Biodiversity Action Plan for 2014-19, which has been produced by Tower Habitats, our biodiversity partnership. It is very important that we conserve biodiversity, not only for its own sake but also to ensure people who live and work in Tower Hamlets ...
Ontogenetic trait variation influences tree community assembly
Ontogenetic trait variation influences tree community assembly

... Abiotic filtering has been found to increase species similarity through abiotic constraints in more stressful environments, resulting in low functional diversity among coexisting species (Weiher and Keddy 1995, Weiher et al. 2011). Biotic filtering, on the other hand, has been found to generate more ...
Rodent abundance, stone bund density and its effects on crop
Rodent abundance, stone bund density and its effects on crop

... distribution was assumed to assess statistical inference. Interannual variation was taken into account by considering factor year as a random effect in the statistical model. Model selection was based on AIC and likelihood ratio test (LRT) (LRT was used to verify whether the random effect year shoul ...
Structure changes in a planktonic food web: biotic and abiotic controls
Structure changes in a planktonic food web: biotic and abiotic controls

... We examined the response of the plankton community to strong changes in the volume of oligotrophic Lake La Caldera through the ice-free period of 1995-1997. As consequence of the changes in the precipitation regime, the lake volume diminished to 2 m depth during the extremely dry year of 1995. The i ...
Here - American Society of Mammalogists
Here - American Society of Mammalogists

... 205, Bogotá, Colombia Mammals are one of the key groups in the functioning of ecosystems, and yet one of the most threatened. Loss of their populations and consequent functional loss can potentially represent a major threat to global ecosystem´s functioning. The aim of this work was to evaluate patt ...
Definitions, Categories and Criteria for Threatened and Priority
Definitions, Categories and Criteria for Threatened and Priority

... future, or is already severely degraded throughout its range but capable of being substantially restored or rehabilitated. An ecological community will be listed as Critically Endangered when it has been adequately surveyed and is found to be facing an extremely high risk of total destruction in the ...
COSEWIC Assessment for Grizzly Bear
COSEWIC Assessment for Grizzly Bear

... Special Concern Reason for designation The global distribution of this large-bodied carnivore has declined by over 50% since the 1800s, with western Canada representing a significant core of the current North American range. A habitat generalist, its distribution and relative abundance in the absenc ...
Biological structure of nearshore rocky subtidal habitats in southern
Biological structure of nearshore rocky subtidal habitats in southern

... described from different areas of the world, few general patterns of community structure hold over wide geographic scales. Consequently, it is unlikely that there are universally important structuring processes except in the broadest sense. In nearshore reef communities dominated by large brown alga ...
Habitat degradation and fishing effects on the size structure of coral
Habitat degradation and fishing effects on the size structure of coral

... disease (Harvell et al. 1999, 2002, Bruno et al. 2007) and severe storms (Emanuel 2005, Webster et al. 2005), while beyond 2050 changes to water chemistry will inhibit growth of corals and reef accretion (Kleypas et al. 1999, Hoegh-Guldberg et al. 2007). Most coral reef fish have a close association ...
Evidence for a trophic cascade on rocky reefs following sea
Evidence for a trophic cascade on rocky reefs following sea

... remain poorly understood. Moreover, little is known so far of the extent and ecological consequences of this sea star mortality event at any location. Many of the affected sea stars were predatory species, raising the possibility of trophic cascades associated with their disappearance and marked com ...
Bust economics: foragers choose high quality habitats in
Bust economics: foragers choose high quality habitats in

... different food densities using an interview chamber experiment. Both species exhibited clear preference for the high density over the lower food density patches as measured in total harvested resources. Similarly, when measuring the proportion of resources harvested within the patches, we observed a ...
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Occupancy–abundance relationship

In ecology, the occupancy–abundance (O–A) relationship is the relationship between the abundance of species and the size of their ranges within a region. This relationship is perhaps one of the most well-documented relationships in macroecology, and applies both intra- and interspecifically (within and among species). In most cases, the O–A relationship is a positive relationship. Although an O–A relationship would be expected, given that a species colonizing a region must pass through the origin (zero abundance, zero occupancy) and could reach some theoretical maximum abundance and distribution (that is, occupancy and abundance can be expected to co-vary), the relationship described here is somewhat more substantial, in that observed changes in range are associated with greater-than-proportional changes in abundance. Although this relationship appears to be pervasive (e.g. Gaston 1996 and references therein), and has important implications for the conservation of endangered species, the mechanism(s) underlying it remain poorly understood
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