Air pollution and biodiversity
... plant species declined by only 25 per cent under the same conditions . Most affected species decline due to pollution, but a minority increase. Studies suggest that if a species is affected by air pollution at all, it is likely to decline. However, a minority of species thrive under polluted condit ...
... plant species declined by only 25 per cent under the same conditions . Most affected species decline due to pollution, but a minority increase. Studies suggest that if a species is affected by air pollution at all, it is likely to decline. However, a minority of species thrive under polluted condit ...
Tactical reproductive parasitism via larval cannibalism
... experiments with two artificial pools presented side by side: one with and one without embryos. The pools were 160 ml opaque plastic cups, wrapped in leaves, wired to trees, filled with 120 ml of water and matched to appear identical except for the presence of embryos. Paired pools (nZ15) were dispe ...
... experiments with two artificial pools presented side by side: one with and one without embryos. The pools were 160 ml opaque plastic cups, wrapped in leaves, wired to trees, filled with 120 ml of water and matched to appear identical except for the presence of embryos. Paired pools (nZ15) were dispe ...
2008 ICTWS Meeting Program - Idaho Chapter of the Wildlife Society
... Law: Cases and Materials (Foundation Press, 2002) and Federal Wildlife Statutes: Texts and Contexts (Foundation Press, 2002). He has also co-edited two volumes that grew out of the Endangered Species Act @ 30 Project, The Endangered Species Act at Thirty: Renewing the Conservation Promise (Island Pr ...
... Law: Cases and Materials (Foundation Press, 2002) and Federal Wildlife Statutes: Texts and Contexts (Foundation Press, 2002). He has also co-edited two volumes that grew out of the Endangered Species Act @ 30 Project, The Endangered Species Act at Thirty: Renewing the Conservation Promise (Island Pr ...
Ecological roles and conservation challenges of social, burrowing
... The conservation status of burrowing mammals varies greatly across species, but populations of most species are heavily and negatively impacted by humans (WebTable 1). Some, like Siberian marmots (Marmota sibirica), are listed as “Endangered” on the International Union for Conservation of Nature (IU ...
... The conservation status of burrowing mammals varies greatly across species, but populations of most species are heavily and negatively impacted by humans (WebTable 1). Some, like Siberian marmots (Marmota sibirica), are listed as “Endangered” on the International Union for Conservation of Nature (IU ...
Community structure of snakes in a human
... (1998: 88%, 1999: 75%) or small patches (1998: 11%, 1999: 64%). All remaining comparisons were based on the 15 occupied patches (large=3, intermediate=5, and small=7) that were sampled in both years. We pooled data collected in both years. We captured seven species (garter, brown, redbelly, milk, ra ...
... (1998: 88%, 1999: 75%) or small patches (1998: 11%, 1999: 64%). All remaining comparisons were based on the 15 occupied patches (large=3, intermediate=5, and small=7) that were sampled in both years. We pooled data collected in both years. We captured seven species (garter, brown, redbelly, milk, ra ...
PDF - 270 KB
... is often higher than that of either bordering habitat because edges contain species from both habitats. However, species that are more successful near edges may negatively affect forest interior species and contribute to indirect effects of fragmentation. Edge effects include a range of beneficial a ...
... is often higher than that of either bordering habitat because edges contain species from both habitats. However, species that are more successful near edges may negatively affect forest interior species and contribute to indirect effects of fragmentation. Edge effects include a range of beneficial a ...
Guideline on Pest Risk Analysis - GB non
... facilitate such an approach in Great Britain. It complies with the CBD and reflects standards used by other schemes such as the Intergovernmental Panel on Climate Change, European Plant Protection Organisation and European Food Safety Authority to ensure good practice. Risk assessments, along with o ...
... facilitate such an approach in Great Britain. It complies with the CBD and reflects standards used by other schemes such as the Intergovernmental Panel on Climate Change, European Plant Protection Organisation and European Food Safety Authority to ensure good practice. Risk assessments, along with o ...
Trophic polymorphism in a terrestrial salamander John C. Maerz,
... habitats where resource availability or the strategies necessary to secure resources may change dramatically between habitats; therefore, resource polymorphisms may be particularly common within populations distributed across a range of habitats. For example, studies of fish show morphological diver ...
... habitats where resource availability or the strategies necessary to secure resources may change dramatically between habitats; therefore, resource polymorphisms may be particularly common within populations distributed across a range of habitats. For example, studies of fish show morphological diver ...
The potential role of ecological corridors for habitat conservation in
... protected areas, have been predicted to be an important feature of the future Irish landscape, mitigating the effects of landscape and habitat fragmentation (Aalen 1997). Corridors, and also 'stepping stones' (patches of habitat between protected sites), are currently an important component of Europ ...
... protected areas, have been predicted to be an important feature of the future Irish landscape, mitigating the effects of landscape and habitat fragmentation (Aalen 1997). Corridors, and also 'stepping stones' (patches of habitat between protected sites), are currently an important component of Europ ...
Inverse density dependence and the Allee effect
... result, a social group driven below a critical threshold would have a lower chance of recovery and consequently become even smaller, with an increasing risk of extinction. This can be illustrated by the African wild dog, Lycaon pictus, which is currently facing the threat of extinction throughout it ...
... result, a social group driven below a critical threshold would have a lower chance of recovery and consequently become even smaller, with an increasing risk of extinction. This can be illustrated by the African wild dog, Lycaon pictus, which is currently facing the threat of extinction throughout it ...
HABITAT - Outdoor Alabama
... months. These days it is hard to find any such fencerows, as managers and farmers have cleaned up their fields or replaced fencerows with mature trees that don’t offer adequate cover. Providing ample cover for nesting, brood rearing, and protection during the winter are beneficial for seasonal survi ...
... months. These days it is hard to find any such fencerows, as managers and farmers have cleaned up their fields or replaced fencerows with mature trees that don’t offer adequate cover. Providing ample cover for nesting, brood rearing, and protection during the winter are beneficial for seasonal survi ...
Environmental Variation, Stochastic Extinction, and Competitive
... from the evolution of individual traits (Cohen 1966; Venable and Brown 1988) to the stability of ecosystem processes (Tilman and Downing 1994; Bai et al. 2004). This basic research must now provide the foundation for understanding the ecological impacts of expected increases in climate variability. ...
... from the evolution of individual traits (Cohen 1966; Venable and Brown 1988) to the stability of ecosystem processes (Tilman and Downing 1994; Bai et al. 2004). This basic research must now provide the foundation for understanding the ecological impacts of expected increases in climate variability. ...
Montane (habitats above the treeline) U1
... and sub-alpine areas represent some of the most natural and undisturbed habitats in the UK. The broad habitat supports a wide range of specialist plant and animal communities. The montane zone consists mainly of high plateaux with steep sided corries, rocky cliffs, crags, boulder fields and scree sl ...
... and sub-alpine areas represent some of the most natural and undisturbed habitats in the UK. The broad habitat supports a wide range of specialist plant and animal communities. The montane zone consists mainly of high plateaux with steep sided corries, rocky cliffs, crags, boulder fields and scree sl ...
The analysis of stress in natural populations
... determining how to analyse the effects of stress on a population. First, the persistence of a population is its continuance through time at some particular (equilibrial) abundance, or its return to that equilibrial abundance after changes. Persistence may occur simply because there are no perturbati ...
... determining how to analyse the effects of stress on a population. First, the persistence of a population is its continuance through time at some particular (equilibrial) abundance, or its return to that equilibrial abundance after changes. Persistence may occur simply because there are no perturbati ...
ON THE ECOLOGY OF INVASIVE SPECIES, EXTINCTION
... Charles Joseph (“Josh”) Donlan was born in the Tidewater area of Virginia. He was lucky enough to be raised in the backwaters of the Chesapeake Bay, where he canoed, crabbed, and swam. At a young age, he was also lucky enough to become employed as the “kid” at several ski and outdoor shops; these ex ...
... Charles Joseph (“Josh”) Donlan was born in the Tidewater area of Virginia. He was lucky enough to be raised in the backwaters of the Chesapeake Bay, where he canoed, crabbed, and swam. At a young age, he was also lucky enough to become employed as the “kid” at several ski and outdoor shops; these ex ...
ON THE ECOLOGY OF INVASIVE SPECIES, EXTINCTION
... Charles Joseph (“Josh”) Donlan was born in the Tidewater area of Virginia. He was lucky enough to be raised in the backwaters of the Chesapeake Bay, where he canoed, crabbed, and swam. At a young age, he was also lucky enough to become employed as the “kid” at several ski and outdoor shops; these ex ...
... Charles Joseph (“Josh”) Donlan was born in the Tidewater area of Virginia. He was lucky enough to be raised in the backwaters of the Chesapeake Bay, where he canoed, crabbed, and swam. At a young age, he was also lucky enough to become employed as the “kid” at several ski and outdoor shops; these ex ...
Effects of Dietary Specialization on Chemical Defense of Poison
... offspring that are raised outside and fed a diet consisting of wild-caught termites and fruit flies will contain alkaloids. Although many experiments and great amounts of evidence support the dietary hypothesis, there are still gaps in knowledge and unanswered questions relating to the diet of poiso ...
... offspring that are raised outside and fed a diet consisting of wild-caught termites and fruit flies will contain alkaloids. Although many experiments and great amounts of evidence support the dietary hypothesis, there are still gaps in knowledge and unanswered questions relating to the diet of poiso ...
Scientific Canadian
... Department of Earth and Ocean Sciences. “Historically, jellyfish have slipped through the cracks,” says Brotz. “They were perceived as an unimportant nuisance to fisheries scientists, yet they are too big to be studied by planktologists. But we now know that they’re very important in the marine ecos ...
... Department of Earth and Ocean Sciences. “Historically, jellyfish have slipped through the cracks,” says Brotz. “They were perceived as an unimportant nuisance to fisheries scientists, yet they are too big to be studied by planktologists. But we now know that they’re very important in the marine ecos ...
California Tiger Salamander
... California tiger salamander populations have experienced dramatic declines throughout the historical range of the species, particularly in the Central Valley. California tiger salamander populations have declined as a result of 2 primary factors: widespread habitat loss and habitat fragmentation. Th ...
... California tiger salamander populations have experienced dramatic declines throughout the historical range of the species, particularly in the Central Valley. California tiger salamander populations have declined as a result of 2 primary factors: widespread habitat loss and habitat fragmentation. Th ...
Koala (Phascolarctos cinereus) – Fact Sheet
... distribution. Chlamydia infections, which often cause infertility in females, coupled with habitat loss and degradation pose major threats to koala populations and lead to local extinctions. Urban development is also a major threat as it leads to tree loss and exposes koalas to predation by dogs and ...
... distribution. Chlamydia infections, which often cause infertility in females, coupled with habitat loss and degradation pose major threats to koala populations and lead to local extinctions. Urban development is also a major threat as it leads to tree loss and exposes koalas to predation by dogs and ...
Spatial and Temporal Dimensions of Biodiversity Dynamics
... reproduction cycle. Such species are vagile opportunists, favoured in rapidly changing environments as in the early stages of succession. It follows that at first, biodiversity is immediately raised due to the increase in species number. As subsequently equitability and structural heterogeneity of t ...
... reproduction cycle. Such species are vagile opportunists, favoured in rapidly changing environments as in the early stages of succession. It follows that at first, biodiversity is immediately raised due to the increase in species number. As subsequently equitability and structural heterogeneity of t ...
Documented Impacts
... of the timing, can negatively impact the following year’s nesting success. Greater SageGrouse Research (2005), 27. Indeed, the mere presence of livestock can cause sagegrouse to abandon their nests. U.S. Fish & Wildlife Service, 12-Month Finding for Petitions to List the Greater Sage-Grouse as Threa ...
... of the timing, can negatively impact the following year’s nesting success. Greater SageGrouse Research (2005), 27. Indeed, the mere presence of livestock can cause sagegrouse to abandon their nests. U.S. Fish & Wildlife Service, 12-Month Finding for Petitions to List the Greater Sage-Grouse as Threa ...
european mink
... Sinclair 1994).Therefore, fulfilling the genetic requirements for population size will also cover the needs for survival from the perspective of demographic requirements. However, environmental stochasticity combined by unlikely but unpredictable catastrophic events has not been addressed so far. On ...
... Sinclair 1994).Therefore, fulfilling the genetic requirements for population size will also cover the needs for survival from the perspective of demographic requirements. However, environmental stochasticity combined by unlikely but unpredictable catastrophic events has not been addressed so far. On ...
The growth–mortality tradeoff: evidence from anuran
... for diVerences in species distributions across resource gradients (Grime and Hunt 1975; Grime et al. 1997; Arendt 1997). Species that are capable of growing fast when resources are abundant often grow poorly when resources are rare. Conversely, species that are capable of growing, albeit slowly, whe ...
... for diVerences in species distributions across resource gradients (Grime and Hunt 1975; Grime et al. 1997; Arendt 1997). Species that are capable of growing fast when resources are abundant often grow poorly when resources are rare. Conversely, species that are capable of growing, albeit slowly, whe ...
Population dynamics of red-backed voles (Myodes) in North America
... holarctic distribution. It appears to be a post-glacial colonizer of North America, with close genetic relationships existing between North American and Far Eastern Siberian populations (Cook et al. 2004). In North America, it occurs north of latitude 60°N in the boreal forest and tundra regions (Ba ...
... holarctic distribution. It appears to be a post-glacial colonizer of North America, with close genetic relationships existing between North American and Far Eastern Siberian populations (Cook et al. 2004). In North America, it occurs north of latitude 60°N in the boreal forest and tundra regions (Ba ...
Decline in amphibian populations
Since the 1980s, declines in amphibian populations, including population crashes and mass localized extinctions, have been noted from locations all over the world. These declines are perceived as one of the most critical threats to global biodiversity, and several causes are believed to be involved, including disease, habitat destruction and modification, exploitation, pollution, pesticide use, introduced species, and ultraviolet-B radiation (UV-B). However, many of the causes of amphibian declines are still poorly understood, and the topic is currently a subject of much ongoing research. Calculations based on extinction rates suggest that the current extinction rate of amphibians could be 211 times greater than the background extinction rate and the estimate goes up to 25,000–45,000 times if endangered species are also included in the computation.