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Encyclopedia > IUCN Red List
Conservation status
the risk of extinction
Extinction

Extinct
Extinct in the Wild
The 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. ... The Dodo, shown here in illustration, is an often-cited[1] example of modern extinction. ... The Dodo, shown here in illustration, is an often-cited[1] example of modern extinction. ...

Threatened

Critically Endangered
Endangered
Vulnerable
Threatened
Organisms that have a conservation status of critically endangered have an extremely high risk of becoming extinct. ... The critically endangered Siberian Tiger, a rare subspecies of tiger. ... This list is incomplete; you can help by expanding it. ... Threatened species refers to animal and plant species under a serious, but perhaps not imminent, threat of extinction. ...

Lower risk

Conservation Dependent
Near Threatened
Least Concern
Domesticated
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. ... Near Threatened (NT) is an 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. ... Least Concern (LC) is an IUCN category assigned to species or lower taxa which do not qualify for any other category. ... Dogs and sheep were among the first animals to be domesticated. ...

See also

World Conservation Union
IUCN Red List
The World Conservation Union or International Union for the Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ...

The IUCN Red List of Threatened Species (also known as the "IUCN Red List" and "Red Data List"), created in 1963, is the world's most comprehensive inventory of the global conservation status of plant and animal species and can be found here. It is maintained by the World Conservation Union. 1963 (MCMLXIII) was a common year starting on Tuesday (the link is to a full 1963 calendar). ... The conservation movement is a political and social movement that seeks to protect natural resources including plant and animal species as well as their habitat for the future. ... In biology, a species is one of the basic units of biodiversity. ... The World Conservation Union or International Union for the Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ...


The IUCN Red List is set upon precise criteria to evaluate the extinction risk of thousands of species and subspecies. These criteria are relevant to all species and all regions of the world. The aim is to convey the urgency of conservation issues to the public and policy makers, as well as help the international community to try to reduce species extinction. The Dodo, shown here in illustration, is an often-cited[1] example of modern extinction. ...


Major species assessors include BirdLife International, the World Conservation Monitoring Centre, and many Specialist Groups within the IUCN's Species Survival Commission (SSC). Collectively, assessments by these organizations and groups account for nearly half the species on the Red List. BirdLife International is the international conservation organization working to protect the world’s birds and their habitats. ... The United Nations Environment Programmes World Conservation Monitoring Centre or UNEP-WCMC is an executive agency of the United Nations Environment Programme, based in Cambridge in the United Kingdom. ... The World Conservation Union or International Union for Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ...


The IUCN Red List is often recognised as the most authoritative guide to the status of biological diversity. Biodiversity or biological diversity is a neologism and a portmanteau word, from bio and diversity. ...


The IUCN aims to have the category of every species re-evaluated every five years if possible, or at least every ten years. This is done in a peer reviewed manner through IUCN Species Survival Commission (SSC) Specialist Groups, which are Red List Authorities responsible for a species, group of species or specific geographic area, or in the case of BirdLife International, an entire class (Aves).[1] There are over 7000 extant species in the 2006 Red List which have not had their category evaluated since 1996. Peer review (known as refereeing in some academic fields) is a scholarly process used in the publication of manuscripts and in the awarding of funding for research. ... BirdLife International is the international conservation organization working to protect the world’s birds and their habitats. ... “Aves” redirects here. ...

Contents

Current release

The latest update is the 2006 Red List, released on 4 May 2006. It evaluates 40,168 species as a whole, plus an additional 2,160 subspecies, varieties, aquatic stocks, and subpopulations. For the Manfred Mann album, see 2006 (album). ... May 4 is the 124th day of the year in the Gregorian calendar (125th in leap years). ... For the Manfred Mann album, see 2006 (album). ... In taxonomy, a subspecies is the taxon immediately subordinate to a species. ... In botanical nomenclature, variety is a rank below that of species: As such, it gets a ternary name (a name in three parts). ... Fish stocks are subpopulations of a particular species of fish, for which intrinsic parameters (growth, recruitment, mortality and fishing mortality) are the only significant factors in determining population dynamics, while extrinsic factors (immigration and emigration) are considered to be insignificant. ...


From the species evaluated as a whole, 16,118 are considered threatened. Of these, 7,725 are animals, 8,390 are plants, and three are lichen and mushrooms. Digimon, the only known animals. ... Divisions Green algae Chlorophyta Charophyta Land plants (embryophytes) Non-vascular plants (bryophytes) Marchantiophyta - liverworts Anthocerotophyta - hornworts Bryophyta - mosses Vascular plants (tracheophytes) †Rhyniophyta - rhyniophytes †Zosterophyllophyta - zosterophylls Lycopodiophyta - clubmosses †Trimerophytophyta - trimerophytes Pteridophyta - ferns and horsetails Seed plants (spermatophytes) †Pteridospermatophyta - seed ferns Pinophyta - conifers Cycadophyta - cycads Ginkgophyta - ginkgo Gnetophyta - gnetae Magnoliophyta - flowering plants... To meet Wikipedias quality standards, the use of images on this page may require cleanup, involving adjustment of image placement, formatting, size, or other adjustments. ... This article or section does not adequately cite its references or sources. ...


This release lists 784 species extinctions recorded since 1500 CE, unchanged from the 2004 release. This is an increase of 18 from the 766 listed as of 2000. Each year a small number of 'extinct' species are either rediscovered, becoming Lazarus species, or are reclassified as 'data deficient'. In 2002, the extinction list dropped to 759 species, but has been rising ever since. 1500 was a common year starting on Monday (see link for calendar) of the Gregorian calendar. ... Era Vulgaris redirects here. ... 2004 (MMIV) was a leap year starting on Thursday of the Gregorian calendar. ... 2000 (MM) was a leap year starting on Saturday of the Gregorian calendar. ... The takahe is an example of a Lazarus taxon. ... For album titles with the same name, see 2002 (album). ...


Categories

Summary of current IUCN Red List categories.
Summary of current IUCN Red List categories.

Species are classified in nine groups, set through criteria such as rate of decline, population size, area of geographic distribution, and degree of population and distribution fragmentation. Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ...

When discussing the IUCN Red List, the official term "threatened" is a grouping of three categories: Critically Endangered, Endangered, and Vulnerable. In biology and ecology, extinction is the ceasing of existence of a species or group of species. ... An endangered species is a species whose population is so small that it is in danger of becoming extinct. ... An endangered species is a species whose population is so small that it is in danger of becoming extinct. ... This list is incomplete; you can help by expanding it. ... Near Threatened (NT) is an 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. ... Least Concern (LC) is an IUCN category assigned to species or lower taxa which do not qualify for any other category. ... 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. ... Threatened species refers to animal and plant species under a serious, but perhaps not imminent, threat of extinction. ...


1994 Categories and Criteria

1994 IUCN Red List categories (version 2.3), used for species which have not been reassessed since 2001.
1994 IUCN Red List categories (version 2.3), used for species which have not been reassessed since 2001.

The older 1994 has only a single "Lower Risk" category which contained three subcategories: Image File history File links No higher resolution available. ... Image File history File links No higher resolution available. ... 1994 (MCMXCIV) was a common year starting on Saturday of the Gregorian calendar, and was designated as the International Year of the Family and the International Year of the Sport and the Olympic Ideal by United Nations. ...

In the 2001 system, Near Threatened and Least Concern have now become their own categories, while Conservation Dependent is no longer used and has been merged into Near Threatened. 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. ... Near Threatened (NT) is an 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. ...


Possibly Extinct

The additional category of Possibly Extinct (PE)[2] is used by Birdlife International, the Red List Authority for birds for the IUCN Red List[3]. Birdlife International has recommended PE become an official category. BirdLife International has not stated whether a "Possibly Extinct in the Wild" category should also be added, although it is mentioned that Spix's Macaw has this status. "Possibly Extinct" can be considered a subcategory of "Critically Endangered". BirdLife International is the international conservation organization working to protect the world’s birds and their habitats. ... Binomial name Cyanopsitta spixii (Wagler, 1832) The Spixs Macaw, Cyanopsitta spixii, was a Brazilian parrot, the only member of the genus Cyanopsitta. ...


See also

The 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. ... This article needs to be wikified. ... cheese ... The World Conservation Union or International Union for the Conservation of Nature and Natural Resources (IUCN) is an international organization dedicated to natural resource conservation. ... The African Wild Dog Conservancy (AWD Conservancy) is a non-profit, 501(c)(3), non-governmental organization, working with local communities, and national and international stakeholders, to conserve the African wild dog through scientific research and education. ...

References

  • IUCN, 2006. Summary Statistics for Globally Threatened Species (1, 3a, 3b). Retrieved 5 May 2006.
  • IUCN, 1994. Categories & Criteria (version 2.3). Retrieved February 12, 2005.
  • IUCN, 2001. Categories & Criteria (version 3.1). Retrieved February 12, 2005.
  • Rodrigues, A.S.L., Pilgrim, J.D., Lamoreux, J.F., Hoffmann, M. & Brooks, T.M. 2006. The value of the IUCN Red List for conservation. Trends in Ecology & Evolution 21(2): 71-76.

May 5 is the 125th day of the year in the Gregorian Calendar (126th in leap years). ... For the Manfred Mann album, see 2006 (album). ... February 12 is the 43rd day of the year in the Gregorian Calendar. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ... February 12 is the 43rd day of the year in the Gregorian Calendar. ... 2005 (MMV) was a common year starting on Saturday of the Gregorian calendar. ...

Notes

  1. ^ Establishment of Red List Authorities. The IUCN SSC Red List Programme. Retrieved on 2006-11-12.
  2. ^ S. H. M. Butchart, et al. Going or gone: defining 'Possibly Extinct' species to give a truer picture of recent extinctions (pdf). Bull. B.O.C. 2006 126A.
  3. ^ Birds on the IUCN Red List. BirdLife International. Retrieved on 2007-01-26.

For the Manfred Mann album, see 2006 (album). ... November 12 is the 316th day of the year (317th in leap years) in the Gregorian Calendar, with 49 days remaining. ... 2007 (MMVII) is the current year, a common year starting on Monday of the Gregorian calendar and the Anno Domini (common) era. ... January 26 is the 26th day of the year in the Gregorian calendar. ...

External link


  Results from FactBites:
 
2004 IUCN Red List - Categories and Criteria (329 words)
The revised Categories and Criteria (IUCN Red List Categories and Criteria version 3.1) were adopted by IUCN Council in February 2000 and all new assessments and reassessments of taxa on the IUCN Red List must follow this revised system.
In the interim, the current Red List includes assessments using both the 1994 Red List Categories and Criteria and the 2001 Categories and Criteria.
Guidelines on how to use the IUCN Red List Categories and Criteria have been developed and an English pdf version of these can be downloaded from: http://www.iucn.org/themes/ssc/red-lists.htm.
  More results at FactBites »

 
 

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