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The world's rediscovered species: back from the brink?
Brett R Scheffers1, Ding Li Yong, J Berton C Harris
1Department of Biological Sciences, National University of Singapore, Singapore, Singapore. schefbr0@gmail.com
Plos One
|August 6, 2011
Summary
Numerous rediscovered species, especially in the tropics, remain critically endangered. Most rediscovered amphibians, birds, and mammals face high extinction threats due to habitat loss.
Area of Science:
- Biodiversity research
- Conservation biology
- Zoology
Background:
- Many species presumed extinct are rediscovered annually.
- The status of these rediscovered species is often unknown.
- Understanding their conservation needs is crucial.
Purpose of the Study:
- To document the number, distribution, and conservation status of rediscovered amphibian, bird, and mammal species globally.
- To analyze trends in species rediscoveries over time.
- To assess the long-term viability and threats faced by rediscovered species.
Main Methods:
- Global data compilation on rediscovered species over 122 years.
- Analysis of rediscovery timelines, geographic distribution, and population status.
- Assessment of conservation status and extinction threats.
Main Results:
- Over 351 species rediscovered globally in 122 years, predominantly in the tropics.
- Species were, on average, missing for 61 years before rediscovery.
- Rediscovered species exhibit restricted ranges, small populations, and high threat levels (92% of amphibians, 86% of birds/mammals).
Conclusions:
- Rediscoveries often represent species on the brink of extinction, not population recovery.
- Widespread habitat loss, especially in tropical regions, severely threatens rediscovered species.
- Urgent conservation interventions are critical for the survival of these species.
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