「Least Concern」の版間の差分

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Least Concern (ソースを閲覧)

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wikipedia:Least Concernへのリダイレクト
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細 (wikipedia:Least Concernへのリダイレクト)
 
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{{Conservation status}}
#redirect [[wikipedia:Least Concern]]
'''Least Concern''' ('''LC''') is an [[World Conservation Union|IUCN]] category assigned to [[extant species|extant taxon]] or lower taxa which have been evaluated but do not qualify for any other category. As such they do not qualify as [[threatened species|threatened]], [[Near Threatened]], or (prior to 2001) [[Conservation Dependent]]. Many common species such as the [[Rock Pigeon]], [[Honeybee]], [[Asian Tiger Mosquito]], [[Common Juniper]], [[Snail Kite]], [[Sacred Kingfisher]] and [[House Mouse]], as well as [[human]]s, are assigned the Least Concern category.
 
Species cannot be assigned the Least Concern category unless they have had their population status evaluated. That is, adequate information is needed to make a direct, or indirect, assessment of its risk of extinction based on its distribution and/or population status.
 
Since 2001 the category has had the abbreviation "LC", following the IUCN 2001 Categories & Criteria (version 3.1).<ref>{{cite web
|url=http://www.redlist.org/info/categories_criteria2001|title=2001 Categories & Criteria (version 3.1)|work=The IUCN Red List of Threathened Species|accessdate=2006-12-19 |archiveurl = http://web.archive.org/web/20061114215755/http://www.redlist.org/info/categories_criteria2001 <!-- Bot retrieved archive --> |archivedate = 2006-11-14}}</ref> However, around 20% of Least Concern taxa (3261 of 15636) in the IUCN database use the code "LR/lc", which indicates they have not been re-evaluated since 2000. Prior to 2001 "least concern" was a subcategory of the "Lower Risk" category and assigned the code "LR/lc" or (lc).
 
While "Least Concern" is not considered a ''red listed'' category by the IUCN, the 2006 [[IUCN Red List|Red List]] still assigns the category to 15636 taxa. The number of animal species listed in this category totals 14033 (which includes several [[undescribed species]] such as a frog from the genus ''[[Philautus]]''<ref>{{cite web|url=http://www.redlist.org/search/details.php?species=58913|title=Philautus sp. nov. 'Kalpatta'|work=The IUCN Red List of Threathened Species|accessdate=2006-12-19}}</ref>). There are also 101 animal subspecies listed and 1500 plant taxa (1410 species, 55 subspecies, and 35 varieties). There are also two animal subpopulations listed: the Australasian and Southern African subpopulations of [[Spiny Dogfish]]. No [[fungi]] or [[protista]] have the classification, though only four species in those kingdoms have been evaluated by the IUCN. [[Human]]s qualify for this category, and in 2008 were formally assessed<ref name="humaniucn">{{cite web|url={{IUCNlink|136584}}|title=IUCN Red List - Homo sapiens|work=The IUCN Red List of Threathened Species|accessdate=2008-10-12}}</ref> as such by the IUCN.
 
== Similar classifications ==
*The [[Committee on the Status of Endangered Wildlife in Canada|COSEWIC]] designates [[Evolutionary Significant Unit|Wildlife Species]] as ''Not At Risk'' ('''NAR''') when they have been evaluated to be not at risk of extinction given the current circumstances.
 
*The [[NatureServe conservation status]] uses the ranking of ''Secure'' ('''G5''') for "demonstrably widespread, abundant, and secure" species which have a stable population
 
*The [[World Wide Fund for Nature|WWF]] uses "relatively stable/relatively intact" (RS) as the least concern status for [[ecoregion]]s.
 
Many category or ranking systems simply do not list Least Concern species. For example [[Australia]]'s [[Environment Protection and Biodiversity Conservation Act 1999|EPBC Act]] does not have a category for "not at risk" species, although such species may be found amongst the lists of "unsuccessful nominations" or "removed" (delisted) fauna and flora. There are, however, other reasons species may be found on these lists, such as taxonomic changes. The US [[Endangered Species Act]] likewise does not list species which are not at risk.
 
==See also==
*[[:Category:Least concern plants]]
*[[:Category:IUCN Red List least concern species]]
 
==References==
{{Reflist}}
{{Refimprove|date=July 2009}}
 
==External links==
* [http://www.iucnredlist.org/apps/redlist/search/link/4cb7fa88-9764dab7 List of Least Concern species] as identified by the [[IUCN Red List of Threatened Species]]
 
[[Category:IUCN Red List least concern species| ]]
[[Category:Least concern species| ]]
[[Category:Least concern plants| ]]
[[Category:Biota by conservation status]]
[[Category:IUCN Red List]]
 
[[ar:غير مهدد]]
[[bg:Незастрашен вид]]
[[ca:Risc mínim]]
[[cs:Málo dotčený]]
[[et:Soodsas seisundis]]
[[es:Especie bajo preocupación menor]]
[[eo:Malplej Zorgiga]]
[[fa:کمترین نگرانی]]
[[hi:खतरे से बाहर]]
[[id:Risiko Rendah]]
[[jv:Spesies jroning kahanan aman]]
[[ku:Cureyên bi kêmtirîn metirsî]]
[[hu:Nem fenyegetett faj]]
[[mr:मुबलक प्रजाती]]
[[ja:軽度懸念]]
[[nn:Livskraftig]]
[[pl:Gatunek najmniejszej troski]]
[[ru:Находятся под наименьшей угрозой]]
[[simple:Least Concern]]
[[sl:Najmanj ogrožena vrsta]]
[[fi:Elinvoimainen laji]]
[[sv:Livskraftig]]
[[ta:தீவாய்ப்புக் கவலை குறைந்த இனம்]]
[[th:สิ่งมีชีวิตที่มีความเสี่ยงต่ำต่อการสูญพันธุ์]]
[[tr:Asgari endişe altındaki türler]]
[[uk:Найменший ризик]]
[[vi:Loài ít quan tâm]]
[[zh:无危物种]]
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