Information about Threatened Species
)
The threatened categories (IUCN Red List)
| Conservation status |
|---|
| the risk of extinction |
| Extinction |
|
Extinct Extinct in the Wild |
| Threatened |
|
Critically Endangered Endangered Vulnerable Threatened |
| Lower risk |
|
Conservation Dependent Near Threatened Least Concern Domesticated |
| See also |
|
World Conservation Union IUCN Red List |
Threatened species are any species (including animals, plants, fungi, insects, bugs, etc.) which are vulnerable to extinction in the near future.
The World Conservation Union (IUCN) is the foremost authority on threatened species, and treats threatened species not as a single category, but as a group of three categories: vulnerable, endangered, and critically endangered, depending on the degree to which they are threatened.
Species which are threatened are sometimes characterised by the population dynamics measure of critical depensation, a mathematical measure of biomass related to population growth rate. This quantitative metric is one method of evaluating the degree of endangerment.
Less-than-threatened categories are Near Threatened, Least Concern, and the no longer assigned category of Conservation Dependent. Species which have not been evaluated (NE), or do not have sufficient data (Data Deficient) also are not considered "threatened" by the IUCN.
Although threatened and vulnerable may be used interchangeably when discussing IUCN categories, the term threatened is generally used to refer to the three categories (critically endangered, endangered and vulnerable), while vulnerable is used to refer to the least at risk of those three categories. They may be used interchangeably in most contexts however, as all vulnerable species are threatened species (vulnerable is a category of threatened species); and, as the more at-risk categories of threatened species (namely endangered and critically endangered) must, by definition, also qualify as vulnerable species, all threatened species may also be considered vulnerable.
Threatened species are also referred to as a red-listed species, as they are listed in the IUCN Red List of Threatened Species.
Subspecies, populations and stocks may also be classified as threatened.
United States
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"Threatened" in relation to "endangered" under the ESA.
See also
- Biodiversity Action Plan
- IUCN Red List
- Illegal logging
- Rare species
- Red and Blue-listed
- Slash-and-burn
- Threatened fauna of Australia
External links
conservation status of a species is an indicator of the likelihood of that species continuing to survive either in the present day or the future. Many factors are taken into account when assessing the conservation status of a species: not simply the number remaining, but the
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extinction is the cessation of existence of a species or group of taxa, reducing biodiversity. The moment of extinction is generally considered to be the death of the last individual of that species (although the capacity to breed and recover may have been lost before this point).
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Extinct in the Wild (EW) is a conservation status assigned to species or lower taxa, the only living members of which are being kept in captivity or as a naturalized population outside its historic range.
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critically endangered have an extremely high risk of becoming extinct.
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IUCN Category
The World Conservation Union (IUCN), widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction[1]..... Click the link for more information.
endangered species is a population of an organism which is at risk of becoming extinct because it is either few in number, or threatened by changing environmental or predation parameters.
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vulnerable species is a species which is likely to become endangered unless the circumstances threatening its survival and reproduction improve. The following is a very small, non-representative fraction of the 8565 species listed as vulnerable on the IUCN Red List.
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Conservation Dependent (LR/cd) was an IUCN category assigned to species or lower taxa which were dependent on conservation efforts to prevent the taxon becoming threatened with extinction.
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Near Threatened (NT) is a conservation status assigned to species or lower taxa which may be considered threatened with extinction in the near future, although it does not currently qualify for the threatened status.
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Least Concern (LC) is an IUCN category assigned to extant species or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, nor Near Threatened, nor (prior to 2001) Conservation Dependent.
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Domestication refers to the process whereby a population of animals or plants becomes accustomed to human provision and control. Humans have brought these populations under their care for a wide range of reasons: to produce food or valuable commodities (such as wool, cotton, or
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IUCN
International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
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International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
..... Click the link for more information.
IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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IUCN
International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
..... Click the link for more information.
International Organization
Founded October 1948, Fontainebleau, France
Headquarters Rue Mauverney 28, 1196 Gland, Switzerland
Key people Mr Valli Moosa
Ms Julia Marton-Lefèvre
Industry Natural resource conservation
..... Click the link for more information.
vulnerable species is a species which is likely to become endangered unless the circumstances threatening its survival and reproduction improve. The following is a very small, non-representative fraction of the 8565 species listed as vulnerable on the IUCN Red List.
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endangered species is a population of an organism which is at risk of becoming extinct because it is either few in number, or threatened by changing environmental or predation parameters.
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critically endangered have an extremely high risk of becoming extinct.
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IUCN Category
The World Conservation Union (IUCN), widely considered to be the most objective and authoritative system for classifying species in terms of the risk of extinction[1]..... Click the link for more information.
Population dynamics is the study of marginal and long-term changes in the numbers, individual weights and age composition of individuals in one or several populations, and biological and environmental processes influencing those changes.
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In population dynamics, depensation is the effect on a population (or stock) whereby, due to certain causes, a decrease in the breeding population (mature individuals) leads to reduced survival and production of eggs or offspring.
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Near Threatened (NT) is a conservation status assigned to species or lower taxa which may be considered threatened with extinction in the near future, although it does not currently qualify for the threatened status.
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Least Concern (LC) is an IUCN category assigned to extant species or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as threatened, nor Near Threatened, nor (prior to 2001) Conservation Dependent.
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Conservation Dependent (LR/cd) was an IUCN category assigned to species or lower taxa which were dependent on conservation efforts to prevent the taxon becoming threatened with extinction.
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Data Deficient (DD) is a category applied by the IUCN to a species when the available information is not sufficient for a proper assessment of conservation status to be made.
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Red-listed species includes any indigenous species or subspecies (taxa) considered to be extirpated, endangered, or threatened in their locale. Extirpated taxa no longer exist in the wild in the locale in which they are listed (i.e.
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IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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The Endangered Species Act (, et seq.) of 1973 or ESA was the most wide-ranging of the dozens of United States environmental laws passed in the 1970s. This act was designed to protect critically imperiled species from extinction due to "the consequences of economic growth
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Motto
"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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"In God We Trust" (since 1956)
"E Pluribus Unum" ("From Many, One"; Latin, traditional)
Anthem
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E. e. bayensis
Trinomial name
Euphydryas editha bayensis
Sternitsky, 1937 & Dos Passos, 1964
The Bay checkerspot butterfly (Euphydryas editha bayensis) is a federally threatened insect species which is native to the U.
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Trinomial name
Euphydryas editha bayensis
Sternitsky, 1937 & Dos Passos, 1964
The Bay checkerspot butterfly (Euphydryas editha bayensis) is a federally threatened insect species which is native to the U.
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Biodiversity Action Plan (BAP) is an internationally recognized program addressing threatened species and habitats, which is designed to protect and restore biological systems. The original impetus for these plans derives from the 1992 Convention on Biological Diversity (CBD).
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IUCN Red List of Threatened Species (also known as the IUCN Red List or Red Data List), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species.
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Illegal logging is the harvest, transportation, purchase or sale of timber in violation of national laws. The harvesting procedure itself may be illegal, including using corrupt means to gain access to forests; extraction without permission or from a protected area; the cutting of
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