What are mudfish? - Department of Conservation
... Four species of mudfishes are recognised in New Zealand, with a further species occurring in Tasmania (the Tasmanian mudfish, Neochanna cleaveri). Apart from the recently discovered Northland mudfish, whose distribution overlaps with that of the black mudfish, the species have quite disjunct distrib ...
... Four species of mudfishes are recognised in New Zealand, with a further species occurring in Tasmania (the Tasmanian mudfish, Neochanna cleaveri). Apart from the recently discovered Northland mudfish, whose distribution overlaps with that of the black mudfish, the species have quite disjunct distrib ...
Population spatial structure, human
... therefore decreases overall population size. This results in a decrease in the number of dispersers available for recolonization and rescue of local populations. which further reduces overall population size. Eventually local extinctions can accumulate to regional extinctions. Habitat fragmentation ...
... therefore decreases overall population size. This results in a decrease in the number of dispersers available for recolonization and rescue of local populations. which further reduces overall population size. Eventually local extinctions can accumulate to regional extinctions. Habitat fragmentation ...
Monday
... MS-LS2-4 : Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations. MS-LS2-5 : Evaluate competing design solutions for ...
... MS-LS2-4 : Construct an argument supported by empirical evidence that changes to physical or biological components of an ecosystem affect populations. MS-LS2-5 : Evaluate competing design solutions for ...
Hydrological and habitat requirements to maintain viable Southern
... hydroperiod can result in mass mortality of tadpoles and poor survivorship amongst resulting metamorphs (Lane and Mahony, 2002). Flooding frequency also plays a key role in structuring amphibian communities because reduced flooding frequency can exclude species that do not have adaptations which all ...
... hydroperiod can result in mass mortality of tadpoles and poor survivorship amongst resulting metamorphs (Lane and Mahony, 2002). Flooding frequency also plays a key role in structuring amphibian communities because reduced flooding frequency can exclude species that do not have adaptations which all ...
LOCAL DISTURBANCE CYCLES AND THE MAINTENANCE OF
... recolonization has been shown to explain species composition and distribution (Wootton 2001a), and the effects of habitat fragmentation on the structure of competitive communities (Roy et al. 2004). It has further been shown to generate landscape-level patchiness and disturbance cycles in model syst ...
... recolonization has been shown to explain species composition and distribution (Wootton 2001a), and the effects of habitat fragmentation on the structure of competitive communities (Roy et al. 2004). It has further been shown to generate landscape-level patchiness and disturbance cycles in model syst ...
Impacts of Climate Change on Wildlife Conservation in the Samiria
... Aquatic wildlife is equally affected by large seasonal inundations. During the flooded periods fish enter water laden forests and feed on the abundance of vegetative and animal production, especially abundant fruits, invertebrates and other living organisms trapped in the annual floods (Junk et al. ...
... Aquatic wildlife is equally affected by large seasonal inundations. During the flooded periods fish enter water laden forests and feed on the abundance of vegetative and animal production, especially abundant fruits, invertebrates and other living organisms trapped in the annual floods (Junk et al. ...
Metaâ•`analysis of the effects of small mammal
... tunnels, and herbivory, can have significant impacts on their ecosystems, both through trophic and non-trophic interactions. Some species have large enough impacts through their disturbances to be classed as ecosystem engineers and/or keystone species. Others have negative or null effects. However, ...
... tunnels, and herbivory, can have significant impacts on their ecosystems, both through trophic and non-trophic interactions. Some species have large enough impacts through their disturbances to be classed as ecosystem engineers and/or keystone species. Others have negative or null effects. However, ...
Spatial and Temporal Dimensions of Biodiversity Dynamics
... Biodiversity dynamics during primary and secondary succession are largely determined by the life histories of the colonising species. Colonisers can be classified as the ecological types of selection r and K, according to the logistic rates of population growth. R-selected species maximise the intri ...
... Biodiversity dynamics during primary and secondary succession are largely determined by the life histories of the colonising species. Colonisers can be classified as the ecological types of selection r and K, according to the logistic rates of population growth. R-selected species maximise the intri ...
Appendix A: Freshwater Mussels
... sediment and removal of shoreline plants that is often a remnant of riparian development can decrease oxygen levels, increase turbidity and change temperature levels in surface waters (NH DES 2005). Young mussels are the most sensitive to pollutants because they burrow into and feed within the sedim ...
... sediment and removal of shoreline plants that is often a remnant of riparian development can decrease oxygen levels, increase turbidity and change temperature levels in surface waters (NH DES 2005). Young mussels are the most sensitive to pollutants because they burrow into and feed within the sedim ...
Reptile Survey - Planning Public Access
... agriculture and forestry. Changes in land use, intensified management, persecution, collection, fires, fragmentation of habitats and increased public pressure have also reduced reptile populations. National and European legislation means that reptiles and (in some cases) their habitats are now prote ...
... agriculture and forestry. Changes in land use, intensified management, persecution, collection, fires, fragmentation of habitats and increased public pressure have also reduced reptile populations. National and European legislation means that reptiles and (in some cases) their habitats are now prote ...
Refuges, Biological Disturbance, and Rocky Subtidal Community Structure in New... Author(s): Jon D. Witman
... Abstract. The effects of two sources of biological disturbance-predation and sea urchin grazingon the structure of benthic communities inside and outside beds of the horse mussel, Modiolus modiolus, were examined in the rocky subtidal zone off the Isles of Shoals, New Hampshire, USA. Multivariate an ...
... Abstract. The effects of two sources of biological disturbance-predation and sea urchin grazingon the structure of benthic communities inside and outside beds of the horse mussel, Modiolus modiolus, were examined in the rocky subtidal zone off the Isles of Shoals, New Hampshire, USA. Multivariate an ...
Habitat use, selection and preference
... – Why not density? Animals can congregate in, or be forced into, areas where they fare poorly – Why not vegetative characteristics? Remember, a particular plant association may promote high fitness in one animal species but not another ...
... – Why not density? Animals can congregate in, or be forced into, areas where they fare poorly – Why not vegetative characteristics? Remember, a particular plant association may promote high fitness in one animal species but not another ...
Impact of environmental factors on fish distribution assessed in rangeland streams
... trout were assumed to be experiencing the observed maximum temperatures. In some cases the downstream limit of trout distribution in these Idaho streams appeared to be limited by unFish in some Northern California bris, overhanging banks or rocks. This suitable habitat (e.g., no water or very stream ...
... trout were assumed to be experiencing the observed maximum temperatures. In some cases the downstream limit of trout distribution in these Idaho streams appeared to be limited by unFish in some Northern California bris, overhanging banks or rocks. This suitable habitat (e.g., no water or very stream ...
Dispersal and persistence
... Barriers – abiotic or biotic feature that restricts movement of genes or individuals from one place to another • Species-specific • Generally, organisms that inhabit fluctuating environments are more tolerant of extreme/unusual conditions than species in stable habitats ...
... Barriers – abiotic or biotic feature that restricts movement of genes or individuals from one place to another • Species-specific • Generally, organisms that inhabit fluctuating environments are more tolerant of extreme/unusual conditions than species in stable habitats ...
Disturbance, Scale, and Boundary in Wilderness
... change resources, substrate availability or the physical environment (White and Harrod 1997; White and Pickett 1985; White and others 1999). A subset of this definition is that proposed by Grime (1979): disturbance as the destruction of biomass. Although these definitions are absolute (as opposed to ...
... change resources, substrate availability or the physical environment (White and Harrod 1997; White and Pickett 1985; White and others 1999). A subset of this definition is that proposed by Grime (1979): disturbance as the destruction of biomass. Although these definitions are absolute (as opposed to ...
Eric Davis Project Advisor: Breck Bowden
... worldwide is in danger of extirpation (IUCN 2010). Several of the pools included in this study, are used by Jefferson Salamanders. These salamanders have been designated a species of greatest conservation need in Vermont because a high proportion of the global population occurs in the Northeast (Ver ...
... worldwide is in danger of extirpation (IUCN 2010). Several of the pools included in this study, are used by Jefferson Salamanders. These salamanders have been designated a species of greatest conservation need in Vermont because a high proportion of the global population occurs in the Northeast (Ver ...
Central Valley and Sierra Nevada
... and the overall lack of habitat limits the populations’ ability to recolonize or move if a disturbance like wildfire eliminates fish from some portion of the stream. Furthermore, most species exist as populations at the upper headwaters, where their ranges cannot shift upstream in response to warmin ...
... and the overall lack of habitat limits the populations’ ability to recolonize or move if a disturbance like wildfire eliminates fish from some portion of the stream. Furthermore, most species exist as populations at the upper headwaters, where their ranges cannot shift upstream in response to warmin ...
Disturbance - Paul Keddy
... might be measured simultaneously. Change in species composition would be an alternative measure of intensity. There is a wide range of measures of similarity between samples (Legendre and Legendre 1983). Using a standard measure of ecological similarity, one could define a range of disturbance inten ...
... might be measured simultaneously. Change in species composition would be an alternative measure of intensity. There is a wide range of measures of similarity between samples (Legendre and Legendre 1983). Using a standard measure of ecological similarity, one could define a range of disturbance inten ...
Nonintrusive Field Experiments Show Different Plant Responses to
... biological processes. Global air temperatures have increased by 0.6°C during the 20th century and are predicted to increase between 1.4 and 5.8°C over this century, with the greatest increases expected in northern latitudes (IPCC 2001). These increases will be accompanied by changes in precipitation ...
... biological processes. Global air temperatures have increased by 0.6°C during the 20th century and are predicted to increase between 1.4 and 5.8°C over this century, with the greatest increases expected in northern latitudes (IPCC 2001). These increases will be accompanied by changes in precipitation ...
Nonnative plant shifts functional groups of arthropods following
... All of the soil characteristics we measured differed between plant communities and the magnitude of some differences changed over time as drought severity decreased (Table 2). Soils in native plant communities were more acidic (1.9 units pH, 95 % CI 1.7–2.2) and had 1.6 % more organic matter (0.1–3. ...
... All of the soil characteristics we measured differed between plant communities and the magnitude of some differences changed over time as drought severity decreased (Table 2). Soils in native plant communities were more acidic (1.9 units pH, 95 % CI 1.7–2.2) and had 1.6 % more organic matter (0.1–3. ...
Disturbance, Diversity, and Invasion: Implications for
... the attributes of c o m p o n e n t species. Disturbance frequency is also important; the time interval between successive disturbances can have significant effects on community response. This is because species composition changes with time since disturbance, and many species require some time afte ...
... the attributes of c o m p o n e n t species. Disturbance frequency is also important; the time interval between successive disturbances can have significant effects on community response. This is because species composition changes with time since disturbance, and many species require some time afte ...
ecosystem - UNL Entomology
... As a living organism on this planet, there is no escaping interaction. Whether its among the biological community, or with the physical environment itself; interaction defines an ecosystem. As British ecologist Arthur Tansley(1935) said, “Though the organisms may claim our primary interest, when we ...
... As a living organism on this planet, there is no escaping interaction. Whether its among the biological community, or with the physical environment itself; interaction defines an ecosystem. As British ecologist Arthur Tansley(1935) said, “Though the organisms may claim our primary interest, when we ...
Deep-Sea Fish Behavioral Responses to Underwater
... South Africa 1. Introduction Fishes have a wide range of perceptual capabilities allowing them to behaviorally respond to various environmental stimuli such as visual, acoustic, mechanical, chemical, and electromagnetic signals. In our “noisy” world of today many artificially evoked signals pass thr ...
... South Africa 1. Introduction Fishes have a wide range of perceptual capabilities allowing them to behaviorally respond to various environmental stimuli such as visual, acoustic, mechanical, chemical, and electromagnetic signals. In our “noisy” world of today many artificially evoked signals pass thr ...
Species resistance and community response to wind disturbance
... 1 Severe winds are the predominant cause of natural disturbance in temperate forests of north-eastern and north-central North America. Conceptual models of the effects of wind disturbance have traditionally focused on the impacts of catastrophic disturbances and have painted a simple picture of how ...
... 1 Severe winds are the predominant cause of natural disturbance in temperate forests of north-eastern and north-central North America. Conceptual models of the effects of wind disturbance have traditionally focused on the impacts of catastrophic disturbances and have painted a simple picture of how ...
Brief - nerc-bess
... Relatively low levels of biodiversity may be sufficient to provide a range of ecosystem services under current environmental conditions [2]. However, the rate and intensity of environmental change is increasing, with future conditions likely to be very different [2]. If species important for underpi ...
... Relatively low levels of biodiversity may be sufficient to provide a range of ecosystem services under current environmental conditions [2]. However, the rate and intensity of environmental change is increasing, with future conditions likely to be very different [2]. If species important for underpi ...