Mammal Population Losses and the Extinction Crisis

@article{Ceballos2002MammalPL,
  title={Mammal Population Losses and the Extinction Crisis},
  author={G. Ceballos and P. Ehrlich},
  journal={Science},
  year={2002},
  volume={296},
  pages={904 - 907}
}
The disappearance of populations is a prelude to species extinction. No geographically explicit estimates have been made of current population losses of major indicator taxa. Here we compare historic and present distributions of 173 declining mammal species from six continents. These species have collectively lost over 50% of their historic range area, mostly where human activities are intensive. This implies a serious loss of ecosystem services and goods. It also signals a substantial threat… Expand
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References

SHOWING 1-10 OF 53 REFERENCES
Population diversity: its extent and extinction.
TLDR
This work estimates the number of populations per area of a sample of species from literature on population differentiation and the average range area of an species from a samples of distribution maps, which yields an estimate of about 220 populations per species. Expand
The Future of Biodiversity
TLDR
Estimates of future extinctions are hampered by the authors' limited knowledge of which areas are rich in endemics, and regions rich in species found only within them (endemics) dominate the global patterns of extinction. Expand
MAMMAL DECLINE AND RECOVERY IN AUSTRALIA
TLDR
Historically, conservation of mammals has concentrated on protection from hunting and trade, reservation of land as national parks and nature reserves, and faunal surveys to map distribution and abundance, but these approaches have been necessary but insufficient to either stabilize the decline of endangered mammals or to promote their recovery. Expand
Splendid Isolation: Patterns of Geographic Range Collapse in Endangered Mammals
TLDR
Geographic-Information-System analysis of range collapse in nonvolant, terrestrial mammals reveals that extant populations of 23 of 31 species were located along the periphery, not the center, of their historic range, and range collapse appears to be independent of fragment area and has a directional bias from east to west. Expand
Extinction: Complexity of Assessing Risk
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 becauseExpand
Global Patterns of Mammalian Diversity, Endemism, and Endangerment
To assess the conservation status of the world’s land mammals, we compiled data on the number of total species, endemic species, recently extinct species, and currently endangered species for 155Expand
Ecological studies and the conservation of the bay checkerspot butterfly, Euphydryas editha bayensis
Abstract The historical decline of the bay checkerspot butterfly Euphydryas editha bayensis is discussed and pertinent ecological information presented. The distribution of the butterfly has becomeExpand
Trajectories to extinction: spatial dynamics of the contraction of geographical ranges
Aim We examined the range contraction of 309 declining species of animals and plants to determine if the contraction dynamics better matched predictions based on the demographic characteristics ofExpand
The vanishing Brazilian Atlantic forest
Abstract The Brazilian Atlantic forest constitutes a unique biome characterised by a high species diversity and a high level of endemism. A long history of land clearing for crops, pastures, timberExpand
Nature's Services: Societal Dependence on Natural Ecosystems
Unprecedented growth and global expansion of human populations over the last 100 years has resulted in the widespread degradation of natural ecosystems. Of equal concern is the basic failure ofExpand
...
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2
3
4
5
...