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Vulnerable habitat or species are monitored and can become increasingly threatened. Some species listed as "vulnerable" may be common in captivity , an example being the military macaw . In 2012 there were 5,196 animals and 6,789 plants classified as vulnerable, compared with 2,815 and 3,222, respectively, in 1998. [ 1 ]
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
The categories data deficient and not evaluated (NE) are not on the spectrum, because they indicate species that have not been reviewed enough to assign to a category. [ 4 ] The category of not evaluated does not indicate that a species is not at risk of extinction, but simply that the species has not yet been studied for any risk to be ...
The world’s frogs, salamanders, newts and other amphibians remain in serious trouble. A new global assessment has found that 41% of amphibian species that scientists have studied are threatened ...
The number of species which have been assessed for the Red List has been increasing over time. [4] As of 2023, of 150,388 species surveyed, 42,108 are considered at risk of extinction because of human activity, in particular overfishing, hunting, and land development. [5] [6]
A threatened species is any species (including animals, plants and fungi) which is vulnerable to extinction in the near future. Species that are threatened are sometimes characterised by the population dynamics measure of critical depensation , a mathematical measure of biomass related to population growth rate .
On 30 January 2010, the IUCN Red List of Threatened Species identified 9694 (4618 Animalia, 5075 Plantae, 1 Protista) Vulnerable species, subspecies and varieties, stocks and sub-populations.
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