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2005-10-19 21:03:27 | Hit : 25461 | Vote : 9052 |
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[ÀÚ·á] ECOLOGY: Global Analyses Reveal Mammals Facing Risk of Extinction |
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Science, Vol 309, Issue 5734, 546-547 , 22 July 2005
[DOI: 10.1126/science.309.5734.546a]
News of the Week
ECOLOGY: Global Analyses Reveal Mammals Facing Risk of Extinction
Eik Stokstad
Two new studies are helping conservation biologists think big--in the case of one of the studies, as big as one-tenth of the continents.
Conservationists typically set goals and priorities for relatively small regions. Although some have come up with priorities for the planet, these have often been wish lists rather than objectives drawn from rigorous analyses. Now a team of researchers, led by mammalogist Gerardo Ceballos of the National Autonomous University of Mexico, has conducted the first global analysis of the conservation status of all known land mammals. On page 603, they report that 25% of known mammal species are at risk of extinction. In order to decrease the risk to mammals worldwide, about 11% of Earth's land should be managed for conservation, the analysis finds.
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