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Comparing the number of species in each category of IUCN Red List 1994 IUCN Red List categories (version 2.3), used for species which have not been reassessed since 2001. There have been a number of versions, dating from 1991, including: [29] [30] Version 1.0 (1991) Version 2.0 (1992) Version 2.1 (1993) Version 2.2 (1994) Version 2.3 (1994)
An IUCN Red List critically endangered (CR or sometimes CE) species is one that has been categorized by the International Union for Conservation of Nature as facing an extremely high risk of extinction in the wild. [1] As of 2021, of the 120,372 species currently tracked by the IUCN, there are 8,404 species that are considered to be critically ...
The IUCN also lists eight fish subspecies as vulnerable. Of the subpopulations of fishes evaluated by the IUCN, 18 species subpopulations have been assessed as vulnerable. For a species to be assessed as vulnerable to extinction the best available evidence must meet quantitative criteria set by the IUCN designed to reflect "a high risk of ...
The IUCN Red List of Threatened Species by the International Union for Conservation of Nature is the best known worldwide conservation status listing and ranking system. . Species are classified by the IUCN Red List into nine groups set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmenta
On the IUCN Red List, endangered is the second-most severe conservation status for wild populations in the IUCN's schema after critically endangered. In 2012, the IUCN Red List featured 3,079 animal and 2,655 plant species as endangered worldwide. [1] The figures for 1998 were 1,102 and 1,197 respectively. [1]
The conservation dependent category is part of the IUCN 1994 Categories & Criteria (version 2.3), which is no longer used in evaluation of taxa, but which persists in the IUCN Red List for taxa evaluated prior to 2001, when version 3.1 was first used.
That same year, "Scientific Foundations of an IUCN Red List of Ecosystems" was published to provide a consistent, practical and theory-based framework for establishing a systematic list. [1] The RLE was officially recognized by IUCN in 2014, to be managed as a Thematic Group under the IUCN Commission on Ecosystem Management (CEM).
The Application of IUCN Red List Criteria at Regional Levels. 15 (5): 1206–1212. Greenbaum, E., Komar, O. 2005. Threat assessment and conservation prioritization of the herpetofauna of El Salvador. Biodiversity and Conservation. 14: 2377–2395. IUCN (2001) IUCN Red List Categories and Criteria: Version 3.1. IUCN Species Survival Commission.