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Definition
The Red List Index measures change in aggregate extinction risk across groups of species. It is based on genuine changes in the number of species in each category of extinction risk on The IUCN Red List of Threatened Species (IUCN 2015) is expressed as changes in an index ranging from 0 to 1.

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Related Variables

Threatened species, Reptiles Threatened species, Mammals Threatened species, Fishes Threatened species, Other inverts

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