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Correlations among extinction risks assessed by different systems of threatened species categorization

O'Grady, Julian J., Burgman, M. A., Keith, D. A., Master, L. L., Andelman, S. J., Brook, Barry W., Hammerson, G. A., Regan, T. and Frankham, Richard (2004). Correlations among extinction risks assessed by different systems of threatened species categorization. Conservation Biology,18(6):1624-1635.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 21 times in Scopus Article | Citations

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Title Correlations among extinction risks assessed by different systems of threatened species categorization
Author O'Grady, Julian J.
Burgman, M. A.
Keith, D. A.
Master, L. L.
Andelman, S. J.
Brook, Barry W.
Hammerson, G. A.
Regan, T.
Frankham, Richard
Journal Name Conservation Biology
Publication Date 2004
Volume Number 18
Issue Number 6
ISSN 0888-8892   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-10644246122
Start Page 1624
End Page 1635
Total Pages 12
Place of Publication Malden, USA
Publisher Blackwell Publishing
HERDC Category C1 - Journal Article (DEST)
Abstract Many different systems are used to assess levels of threat faced by species. Prominent ones are those used by the World Conservation Union, NatureServe, and the Florida Game and Freshwater Fish Commission (now the Florida Fish and Wildlife Conservation Commission). These systems assign taxa a threat ranking by assessing, their demographic and ecological characteristics. These threat rankings support the legislative protection of species and guide the placement of conservation programs in order of priority. It is not known, however whether these assessment systems rank species in a similar order To resolve this issue, we assessed 55 mainly vertebrate taxa with widely differing life histories under each of these systems and determined the rank correlations among them. Moderate, significant positive correlations were seen among the threat rankings provided by the three systems (correlations 0.58-0.69). Further the threat rankings for taxa obtained using these systems were significantly correlated to their rankings based on predicted probability of extinction within 100 years as determined by population viability analysis (correlations 0.28-0.37). The different categorization systems, then, yield related but not identical threat rankings, and these rankings are associated with predicted extinction risk.
Keywords endangered species
extinction risk
population viability analysis
threat rankings
population viability analysis
tricholimnas-sylvestris sclater
lichenostomus melanops cassidix
robin copsychus-sechellarum
yellowstone grizzly bear
felis-pardina temminck
red list criteria
soay sheep
conservation biology
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