View source for Biology:Biodiversity hotspot

{{Short description|Biogeographic region with significant levels of biodiversity that is threatened with destruction}}
A '''biodiversity hotspot''' is a [[Earth:Ecoregion|biogeographic region]] with significant levels of [[Biology:Biodiversity|biodiversity]] that is threatened by human habitation.<ref name=hotspots>{{cite web|url=http://www.bsienvis.nic.in/Database/Biodiversity-Hotspots-in-India_20500.aspx|title=Biodiversity Hotspots in India|website=www.bsienvis.nic.in}}</ref><ref name=conservation>{{cite web|url=http://www.conservation.org/How/Pages/Hotspots.aspx|title=Why Hotspots Matter|website=Conservation International}}</ref> Norman Myers wrote about the concept in two articles in ''The Environmentalist'' in 1988 <ref>{{cite journal|last=Myers|first=N.|journal=Environmentalist|volume=8|pages=187–208|year=1988|title=Threatened biotas: "Hot spots" in tropical forests|issue=3|doi=10.1007/BF02240252|pmid=12322582|bibcode=1988ThEnv...8..187M |s2cid=2370659}}</ref> and 1990,<ref>Myers, N. The Environmentalist 10 243-256 (1990)</ref> after which the concept was revised following thorough analysis by Myers and others into “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”<ref>Russell A. Mittermeier, Norman Myers and Cristina Goettsch Mittermeier, ''Hotspots: Earth's Biologically Richest and Most Endangered Terrestrial Ecoregions,'' Conservation International, 2000 {{ISBN|978-968-6397-58-1}}</ref> and a paper published in the journal ''Nature'', both in 2000.<ref name="MyersMittermeier2000"/>

To qualify as a biodiversity hotspot on Myers' 2000 edition of the hotspot map, a region must meet two strict criteria: it must contain at least 1,500 species of [[Biology:Vascular plant|vascular plant]]s (more than 0.5% of the world's total) as [[Biology:Endemism|endemics]], and it has to have lost at least 70% of its primary vegetation.<ref name="MyersMittermeier2000">{{cite journal|last1=Myers|first1=Norman|last2=Mittermeier|first2=Russell A.|last3=Mittermeier|first3=Cristina G.|last4=da Fonseca|first4=Gustavo A. B.|last5=Kent|first5=Jennifer|journal=Nature|volume=403|issue=6772|year=2000|pages=853–858|title=Biodiversity hotspots for conservation priorities|url=https://www.nature.com/nature/journal/v403/n6772/pdf/403853a0.pdf|issn=0028-0836|doi=10.1038/35002501|pmid=10706275|bibcode=2000Natur.403..853M|s2cid=4414279}}</ref> Globally, 36 zones qualify under this definition.<ref name="auto">{{cite web|title=Biodiversity hotspots defined|url=https://www.cepf.net/our-work/biodiversity-hotspots/hotspots-defined|website=Critical Ecosystem Partnership Fund|publisher=Conservation International|access-date=10 August 2020}}</ref> These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian [[Biology:Species|species]], with a high share of those species as endemics. Some of these hotspots support up to 15,000 endemic plant species, and some have lost up to 95% of their natural habitat.<ref name="auto"/>

Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet's surface.<ref name=conservation/> Ten hotspots were originally identified by Myer;<ref name=hotspots/> the current 36 used to cover more than 15.7% of all the land but have lost around 85% of their area.<ref>{{cite web|url=https://www.e-education.psu.edu/geog30/book/export/html/393|title=Biodiversity Hotspots|website=www.e-education.psu.edu}}</ref> This [[Earth:Habitat destruction|loss of habitat]] is why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area. Caribbean Islands like Haiti and Jamaica are facing serious pressures on the populations of endemic plants and vertebrates as a result of rapid deforestation. Other areas include the Tropical Andes, Philippines, Mesoamerica, and Sundaland, which, under the current levels at which deforestation is occurring, will likely lose most of their plant and vertebrate species.<ref>{{Cite journal|last1=Brooks|first1=Thomas M.|last2=Mittermeier|first2=Russell A.|last3=Mittermeier|first3=Cristina G.|last4=da Fonseca|first4=Gustavo A. B.|last5=Rylands|first5=Anthony B.|last6=Konstant|first6=William R.|last7=Flick|first7=Penny|last8=Pilgrim|first8=John|last9=Oldfield|first9=Sara|last10=Magin|first10=Georgina|last11=Hilton-Taylor|first11=Craig|date=August 2002|title=Habitat Loss and Extinction in the Hotspots of Biodiversity|url=https://doi.org/10.1046/j.1523-1739.2002.00530.x|journal=Conservation Biology|volume=16|issue=4|pages=909–923|doi=10.1046/j.1523-1739.2002.00530.x|bibcode=2002ConBi..16..909B |s2cid=44009934|issn=0888-8892}}</ref>

==Hotspot conservation initiatives==
Only a small percentage of the total land area within biodiversity hotspots is now protected. Several international organizations are working to conserve biodiversity hotspots.
* Critical Ecosystem Partnership Fund (CEPF) is a global program that provides funding and technical assistance to nongovernmental organizations in order to protect the Earth's richest regions of plant and animal diversity, including biodiversity hotspots, high-biodiversity wilderness areas and important marine regions.
* The [[Organization:World Wide Fund for Nature|World Wide Fund for Nature]] has devised a system called the "[[Earth:Global 200|Global 200 Ecoregions]]", the aim of which is to select priority ecoregions for conservation from fourteen terrestrial, three freshwater, and four marine habitat types. They are chosen for species richness, endemism, taxonomic uniqueness, unusual ecological or evolutionary phenomena, and global rarity. All biodiversity hotspots contain at least one Global 200 Ecoregion.
* Birdlife International has identified 218 “Endemic Bird Areas” (EBAs) each of which holds two or more bird species found nowhere else. Birdlife International has identified more than 11,000 Important Bird Areas<ref>[http://www.birdlife.org/datazone/sites/index.html] {{webarchive|url=https://web.archive.org/web/20070808183125/http://www.birdlife.org/datazone/sites/index.html|date=August 8, 2007}}</ref> all over the world.
* Plant life International coordinates programs aiming to identify and manage [[Earth:Important Plant Areas|Important Plant Areas]].
* [[Organization:Alliance for Zero Extinction|Alliance for Zero Extinction]] is an initiative of scientific organizations and conservation groups who co-operate to focus on the most threatened endemic species of the world. They have identified 595 sites, including many ''Birdlife’s Important Bird Areas''.
* The [[Organization:National Geographic Society|National Geographic Society]] has prepared a world map<ref>{{cite web|url=http://www.biodiversityhotspots.org/xp/hotspots/Documents/cihotspotmap.pdf|title=Conservation International|publisher=The Biodiversity Hotspots|date=2010-10-07|access-date=2012-06-22|url-status=dead|archive-url=https://web.archive.org/web/20120327075212/http://www.biodiversityhotspots.org/xp/hotspots/Documents/cihotspotmap.pdf|archive-date=2012-03-27}}</ref> of the hotspots and ArcView shapefile and metadata for the Biodiversity Hotspots<ref>{{cite web|url=http://www.biodiversityhotspots.org/xp/hotspots/Documents/hotspots_revisited_2004.zip|title=Conservation International|publisher=The Biodiversity Hotspots|date=2010-10-07|access-date=2012-06-22|url-status=dead|archive-url=https://web.archive.org/web/20120320054336/http://www.biodiversityhotspots.org/xp/hotspots/Documents/hotspots_revisited_2004.zip|archive-date=2012-03-20}}</ref> including details of the individual endangered fauna in each hotspot, which is available from [[Organization:Conservation International|Conservation International]].<ref>{{cite web|url=http://www.biodiversityhotspots.org/xp/Hotspots/resources/pages/maps.aspx|title=Resources|publisher=Biodiversityhotspots.org|date=2010-10-07|access-date=2012-06-22|url-status=dead|archive-url=https://web.archive.org/web/20120324024634/http://www.biodiversityhotspots.org/xp/Hotspots/resources/pages/maps.aspx|archive-date=2012-03-24}}</ref>
* The Compensatory Afforestation Management and Planning Authority (CAMPA) seeks to control the destruction of forests in India.

==Distribution by region==
[[File:Biodiversity Hotspots.svg|thumb|upright=2.3|Biodiversity hotspots. Original proposal in green, and added regions in blue.<ref>{{cite web|title=Biodiversity Hotspots|url=https://www.e-education.psu.edu/geog30/node/393|website=GEOG 30N: Environment and Society in a Changing World|publisher=John A. Dutton e-Education Institute, College of Earth and Mineral Sciences, [[Organization:Pennsylvania State University|Pennsylvania State University]]|access-date=3 August 2022}}</ref>]]

A majority of biodiversity exists within the tropics; likewise, most biodiversity hotspots are within the tropics.<ref>{{Cite journal|last1=Harvey|first1=Michael G.|last2=Bravo|first2=Gustavo A.|last3=Claramunt|first3=Santiago|last4=Cuervo|first4=Andrés M.|last5=Derryberry|first5=Graham E.|last6=Battilana|first6=Jaqueline|last7=Seeholzer|first7=Glenn F.|last8=McKay|first8=Jessica Shearer|last9=O’Meara|first9=Brian C.|last10=Faircloth|first10=Brant C.|last11=Edwards|first11=Scott V.|last12=Pérez-Emán|first12=Jorge|last13=Moyle|first13=Robert G.|last14=Sheldon|first14=Frederick H.|last15=Aleixo|first15=Alexandre|date=2020-12-11|title=The evolution of a tropical biodiversity hotspot|url=https://www.science.org/doi/10.1126/science.aaz6970|journal=Science|language=en|volume=370|issue=6522|pages=1343–1348|doi=10.1126/science.aaz6970|pmid=33303617 |bibcode=2020Sci...370.1343H |hdl=10138/329703 |s2cid=228084618 |issn=0036-8075|hdl-access=free}}</ref> Of the 36 biodiversity hotspots, 15 are classified as old, climatically-buffered, infertile landscapes (OCBILs). <ref>{{Cite web|url=https://academic.oup.com/biolinnean/article/133/2/266/6118895|access-date=2023-03-23}}</ref> These areas have been historically isolated from interactions with other climate zones, but recent human interaction and encroachment have put these historically safe hotspots at risk. OCBILs have mainly been threatened by the relocation of indigenous groups and military actions as the infertile ground has previously dissuaded human populations.<ref>{{Cite journal|last1=Hopper|first1=Stephen D.|last2=Silveira|first2=Fernando A. O.|last3=Fiedler|first3=Peggy L.|date=2016-06-01|title=Biodiversity hotspots and Ocbil theory|url=https://doi.org/10.1007/s11104-015-2764-2|journal=Plant and Soil|language=en|volume=403|issue=1|pages=167–216|doi=10.1007/s11104-015-2764-2|bibcode=2016PlSoi.403..167H |s2cid=254948226 |issn=1573-5036}}</ref> The conservation of OCBILs within biodiversity hotspots has started to garner attention because current theories believe these sites provide not only high levels of biodiversity, but they have relatively stable lineages and the potential for high levels of speciation in the future. Because these sites are relatively stable, they can be classified as [[Biology:Refugium (population biology)|refugia]].<ref>{{Cite journal|last=Hopper|first=Stephen D.|date=2009-09-01|title=OCBIL theory: towards an integrated understanding of the evolution, ecology and conservation of biodiversity on old, climatically buffered, infertile landscapes|url=https://doi.org/10.1007/s11104-009-0068-0|journal=Plant and Soil|language=en|volume=322|issue=1|pages=49–86|doi=10.1007/s11104-009-0068-0|bibcode=2009PlSoi.322...49H |s2cid=28155038 |issn=1573-5036}}</ref>

'''[[Place:Northern America|North]] and Central America'''
* California Floristic Province (8)
* Madrean pine–oak woodlands (26)
* [[Place:Mesoamerica|Mesoamerica]] (2)
* North American Coastal Plain (36)<ref>{{cite web|title=North American Coastal Plain|publisher=Critical Ecosystem Partnership Fund|url=https://www.cepf.net/our-work/biodiversity-hotspots/north-american-coastal-plain|access-date=7 February 2019}}</ref><ref>{{cite journal|first1=Reed F.|last1=Noss|first2=William J.|last2=Platt|first3=Bruce A.|last3=Sorrie|first4=Alan S.|last4=Weakley|first5=D. Bruce|last5=Means|first6=Jennifer|last6=Costanza|first7=Robert K.|last7=Peet|title=How global biodiversity hotspots may go unrecognized: lessons from the North American Coastal Plain|journal=Diversity and Distributions|year=2015|volume=21|issue=2|pages=236–244|doi=10.1111/ddi.12278|bibcode=2015DivDi..21..236N |url=http://repository.lib.ncsu.edu/bitstream/1840.2/2642/1/Noss%20et%20al%202014%20Coastal%20Plain%20hotspot%20D%26D.pdf|doi-access=free}}</ref>

'''The Caribbean'''
* Caribbean Islands (3)

'''[[Earth:South America|South America]]''' 
* [[Place:Atlantic Forest|Atlantic Forest]] (4)
* [[Place:Cerrado|Cerrado]] (6)
* Chilean Winter Rainfall-Valdivian Forests (7)
* Tumbes–Chocó–Magdalena (5)
* [[Place:Tropical Andes|Tropical Andes]] (1)

'''[[Earth:Europe|Europe]]'''
* [[Place:Mediterranean Basin|Mediterranean Basin]] (14)

'''[[Earth:Africa|Africa]]'''
* [[Biology:Cape Floristic Region|Cape Floristic Region]] (12)
* Coastal Forests of Eastern Africa (10)
* Eastern Afromontane (28)
* Guinean Forests of West Africa (11)
* [[Place:Horn of Africa|Horn of Africa]] (29)
* Madagascar and the Indian Ocean Islands (9)
* Maputaland-Pondoland-Albany (27)
* Succulent Karoo (13)

'''[[Place:Central Asia|Central Asia]]'''
* Mountains of Central Asia (31)

'''[[Place:South Asia|South Asia]]'''
* [[Place:Eastern Himalaya|Eastern Himalaya]] (32)
* Indo-Burma, Bangladesh, India and Myanmar (19)
* Western Ghats and Sri Lanka (21)

'''[[Place:Southeast Asia|Southeast Asia]] and [[Earth:Asia-Pacific|Asia-Pacific]]'''
* [[Earth:East Melanesian Islands|East Melanesian Islands]] (34)
* New Caledonia (23)
* New Zealand (24)
* Philippines (18)
* [[Biology:Oceanian realm|Polynesia-Micronesia]] (25)
* Eastern Australian temperate forests (35)
* Southwest Australia (22)
* [[Earth:Sundaland|Sundaland]], Indonesia and Nicobar islands of India (16)
* [[Biology:Wallacea|Wallacea]] of Indonesia (17)

'''[[Place:East Asia|East Asia]]'''
* Japan (33)
* Mountains of Southwest China (20)

'''[[Place:Western Asia|West Asia]]'''
* [[Earth:Caucasus|Caucasus]] (15)
* Irano-Anatolian (30)

==Critiques of "Hotspots"==
The high profile of the biodiversity hotspots approach has resulted in some criticism. Papers such as Kareiva & Marvier (2003)<ref>{{cite journal|last1=Kareiva|first1=Peter|last2=Marvier|first2=Michelle|title=Conserving Biodiversity Coldspots: Recent calls to direct conservation funding to the world's biodiversity hotspots may be bad investment advice|journal=American Scientist|date=2003|volume=91|issue=4|pages=344–351|doi=10.1511/2003.4.344|jstor=27858246|url=https://www.jstor.org/stable/27858246|access-date=10 May 2022|issn=0003-0996}}</ref> have argued that the biodiversity hotspots:

* Do not adequately represent other forms of species richness (e.g. total species richness or threatened species richness).
* Do not adequately represent taxa other than vascular plants (e.g. vertebrates and fungi).
* Do not protect smaller scale richness hotspots.
* Do not make allowances for changing land use patterns. Hotspots represent regions that have experienced considerable [[Earth:Habitat destruction|habitat loss]], but this does not mean they are experiencing ongoing habitat loss. On the other hand, regions that are relatively intact (e.g. the [[Place:Amazon basin|Amazon basin]]) have experienced relatively little [[Earth:Land loss|land loss]], but are currently losing habitat at tremendous rates.
* Do not protect [[Biology:Ecosystem services|ecosystem services]].
* Do not consider [[Biology:Phylogenetic diversity|phylogenetic diversity]].<ref>{{cite journal|last1=Daru|first1=Barnabas H.|last2=van der Bank|first2=Michelle|last3=Davies|first3=T. Jonathan|year=2014|title=Spatial incongruence among hotspots and complementary areas of tree diversity in southern Africa|journal=Diversity and Distributions|volume=21|issue=7|pages=769–780|doi=10.1111/ddi.12290|s2cid=18417574|doi-access=free}}</ref>

A recent series of papers has pointed out that biodiversity hotspots (and many other priority region sets) do not address the concept of cost.<ref>{{cite journal|last1=Possingham|first1=Hugh P.|last2=Wilson|first2=Kerrie A.|title=Turning up the heat on hotspots|journal=Nature|date=August 2005|volume=436|issue=7053|pages=919–920|doi=10.1038/436919a|pmid=16107821|s2cid=4398455|language=en|issn=1476-4687|doi-access=free}}</ref> The purpose of biodiversity hotspots is not simply to identify regions that are of high biodiversity value, but to prioritize conservation spending. The regions identified include some in the developed world (e.g. the California Floristic Province), alongside others in the developing world (e.g. {{wipe|Madagascar}}). The cost of land is likely to vary between these regions by an order of magnitude or more, but the biodiversity hotspot designations do not consider the conservation importance of this difference. However, the available resources for conservation also tend to vary in this way.

==See also==
{{div col}}
* {{annotated link|Biology:Biodiversity}}
* {{annotated link|Biology:Conservation biology}}
* {{annotated link|Earth:Crisis ecoregion}}
* {{annotated link|Earth:Ecoregion}}
* {{annotated link|Earth:Global 200}}
* {{annotated link|Biology:Hawaiian honeycreeper conservation}}
* {{annotated link|Earth:Key Biodiversity Area}}
* {{annotated link|Biology:Megadiverse countries}}
{{div col end}}

==References==
{{Reflist|30em}}

==Further reading==
* [https://archive.today/20080521135926/http://publishing.royalsociety.org/biodiversity-hotspots Dedicated issue of ''Philosophical Transactions B'' on Biodiversity Hotspots. Some articles are freely available.]
* Spyros Sfenthourakis, Anastasios Legakis: ''Hotspots of endemic terrestrial invertebrates in Southern Greece''. Kluwer Academic Publishers, 2001

==External links==

*[http://www.biodiversitya-z.org/areas/9/ A-Z of Areas of Biodiversity Importance: Biodiversity Hotspots]
*[https://web.archive.org/web/20070101130955/http://www.biodiversityhotspots.org/xp/Hotspots/ Conservation International's Biodiversity Hotspots project]
*[http://www.awdconservancy.org/ African Wild Dog Conservancy's Biodiversity Hotspots Project]
*[http://www.biodiversityofindia.org/index.php?title=Biodiversity_hotspots_in_India Biodiversity hotspots in India]
*[https://web.archive.org/web/20120926034031/http://savingspecies.org/2012/stunning-new-biodiversity-maps-show-where-to-prioritize-conservation/ New biodiversity maps color-coded to show hotspots]
*[https://zenodo.org/record/3261807#.XXua0ShKh9M Shapefile of the Biodiversity Hotspots (v2016.1)]


{{DEFAULTSORT:Biodiversity Hotspot}}
[[Category:Biodiversity]]
[[Category:International environmental organizations]]

{{Sourceattribution|Biodiversity hotspot}}