Results 291 to 300 of about 98,902 (310)

Biological Correlates of Extinction Risk in Bats

The American Naturalist, 2003
(Uploaded by Plazi for the Bat Literature Project) We investigated patterns and processes of extinction and threat in bats using a multivariate phylogenetic comparative approach. Of nearly 1,000 species worldwide, 239 are considered threatened by the International Union for Conservation of Nature and Natural Resources (IUCN) and 12 are extinct.
John L. Gittleman, Kate E. Jones, Andy Purvis   +2 more
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Staying Alive: Extinction Risk: Introduction to Extinction and Extinction Bias

2018
Data driven curriculum module from Dryad Digital ...
Samantha A. Price, Anna Thanukos, Samantha Swauger, Peggy Schaeffer   +3 more
openaire   +2 more sources

Extinction Risk in Endemic Marine Fishes

Conservation Biology, 2011
[Extract] Developing effective management strategies for conserving species requires identifying the species with the greatest probability of extinction and determining why the probabilities are high. In terrestrial systems, endemic island species have the highest rates of extinctions (Frankham 1998; Whittaker 1998).
Hobbs, J-P. A., Jones, G.P., Munday, P.L.   +2 more
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Greenland sled dogs at risk of extinction

Science, 2018
Dog ( Canis familiaris ) and sled remains found together suggest that the first sled dogs arose approximately 10,000 years ago ([ 1 ][1]). The ancestors to current sled dog breeds were essential to the Inuit's conquest of the Arctic. Sled dogs provided the main transport and hunting platform ([ 2 ][
M. Thomas P. Gilbert, Geoff Houser, Morten Meldgaard, Morten Meldgaard, Rikke Langebæk, Christian Sonne, Carsten Egevang, Mikkel-Holger S. Sinding, Emilie Andersen-Ranberg, Emilie Andersen-Ranberg, Anders J. Hansen, Rune Dietz, Morten Tange Olsen   +12 more
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EXTINCTION RISK OF HETEROGENEOUS POPULATIONS

Ecology, 2005
The extinction of small populations is a stochastic process, affected by both environmental variation and chance variation in the fates of individuals (demographic stochasticity). Here I examine how population extinction risk is affected by variation in the underlying individual phenotypes, using a branching-process approach.
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Extinction: Complexity of Assessing Risk

Science, 2001
In discussing the extinction risk of naive prey species confronted by reintroduced predators ( Science 's Compass, 9 Feb., p. [997][1]), J. L. Gittleman and M. E. Gompper say that, apparently because of diverse anthropogenic impacts, “a markedly higher proportion of ungulate species compared ...
Clare Flemming, Ross D. E. MacPhee
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Estimating extinction risk with minimal data

Biological Conservation, 2017
Anthropogenic pressures on the global biome are causing widespread species declines and extinctions. Assessing the extinction risk faced by individual species is a critical first step in combating this trend. However, we lack high quality demographic data to do so for the vast majority of plant and animal species.
Weiss-Lehman, Christopher, Davies, Kendi F, Clements, Christopher, Melbourne, Brett A   +3 more
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Comparing Risk Factors for Population Extinction

Journal of Theoretical Biology, 2000
Extinction risk of natural populations of animals and plants is enhanced by many different processes, including habitat size reduction and toxic chemical exposure. We develop a method to evaluate different risk factors in terms of the decrease in the mean extinction time.
Hiroshi Hakoyama, Yoh Iwasa, Junko Nakanishi   +2 more
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Extinction risk in fragmented habitats

Animal Conservation, 2004
AbstractPopulation models incorporating demographic, environmental and genetic stochasticity were created from long‐term data on natural populations of 30 species of vertebrates. The probability of extinction for a single population in a continuous habitat was compared to that of multiple isolated, or semi‐isolated, populations occupying a fragmented ...
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Metapopulation extinction risk: Dispersal’s duplicity

Theoretical Population Biology, 2009
Metapopulation extinction risk is the probability that all local populations are simultaneously extinct during a fixed time frame. Dispersal may reduce a metapopulation's extinction risk by raising its average per-capita growth rate. By contrast, dispersal may raise a metapopulation's extinction risk by reducing its average population density.
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