Improvements to the Red List Index | Zendy

Stuart H. M. Butchart | Zendy; H. Reşi̇t Akçakaya | Zendy; Janice Chanson | Zendy; Jonathan Baillie | Zendy; Ben Collen | Zendy; Suhel Quader | Zendy; Will R. Turner | Zendy; Rajan Amin | Zendy; Simon N. Stuart | Zendy; Craig HiltonTaylor | Zendy

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Improvements to the Red List Index

Author(s) -

Stuart H. M. Butchart,

H. Reşi̇t Akçakaya,

Janice Chanson,

Jonathan Baillie,

Ben Collen,

Suhel Quader,

Will R. Turner,

Rajan Amin,

Simon N. Stuart,

Craig HiltonTaylor

Publication year - 2007

Publication title -

plos one

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.99

H-Index - 332

ISSN - 1932-6203

DOI - 10.1371/journal.pone.0000140

Subject(s) - iucn red list , extinction (optical mineralogy) , index (typography) , statistics , suite , computer science , econometrics , geography , biology , mathematics , ecology , world wide web , paleontology , archaeology

The Red List Index uses information from the IUCN Red List to track trends in the projected overall extinction risk of sets of species. It has been widely recognised as an important component of the suite of indicators needed to measure progress towards the international target of significantly reducing the rate of biodiversity loss by 2010. However, further application of the RLI (to non-avian taxa in particular) has revealed some shortcomings in the original formula and approach: It performs inappropriately when a value of zero is reached; RLI values are affected by the frequency of assessments; and newly evaluated species may introduce bias. Here we propose a revision to the formula, and recommend how it should be applied in order to overcome these shortcomings. Two additional advantages of the revisions are that assessment errors are not propagated through time, and the overall level extinction risk can be determined as well as trends in this over time.

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