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The International Union for Conservation of Nature (IUCN) is an international organization working in the field of nature conservation and sustainable use of natural resources. [3] Founded in 1948, IUCN has become the global authority on the status of the natural world and the measures needed to safeguard it.
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
status_system IUCN3.1 global? Yes (except "stocks and populations") status EX EW CR EN VU NT LC DD NE PE PEW status_ref {{}}Link (criteria) (search) Notes PE and PEW (Probably Extinct and Probably Extinct in the Wild) are not official IUCN categories, but PE has been adopted by Birdlife International, and the terms appear within the IUCN Red List entries.
The IUCN Red List of Threatened Species is the best-known worldwide conservation status listing and ranking system. [ 8 ] Over 50% of the world's species are estimated to be at risk of extinction, [ 9 ] but the frontier between categories such as 'endangered', 'rare', or 'locally extinct' species is often difficult to draw given the general ...
IUCN definition [ edit ] The International Union for Conservation of Nature (IUCN) is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories, depending on the degree to which they are threatened: [ 2 ] : 8–11
[2] [6] The Green Status complements the Red List assessment but does not replace it: both assessments are performed by the IUCN for a given species and, with the exception of species extinct in the wild that would require reintroduction as a conservation measure and whose current Green Score is by definition 0%, one status does not determine ...
The Red List Index (sampled approach) (SRLI) has been developed in order to determine the threat status and also trends of lesser-known and less charismatic species groups. It is a collaboration between IUCN members and is coordinated through the Institute of Zoology (IoZ), the research division of the Zoological Society of London (ZSL).
LRE - Knowledge product of IUCN/CEM. The IUCN Red List of Ecosystems (RLE) is a global framework for monitoring and documenting the status of ecosystems. It was developed by the International Union for Conservation of Nature for biodiversity risk assessment. Its main objectives are to support conservation, resource use, and management decisions ...