Biodiversity hotspot

A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation.[1][2] Norman Myers wrote about the concept in two articles in The Environmentalist in 1988 [3] and 1990,[4] after which the concept was revised following thorough analysis by Myers and others into "Hotspots: Earth's Biologically Richest and Most Endangered Terrestrial Ecoregions"[5] and a paper published in the journal Nature, both in 2000.[6]

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 vascular plants (more than 0.5% of the world's total) as endemics, and it has to have lost at least 70% of its primary vegetation.[6] Globally, 36 zones qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian 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.[7]

Biodiversity hotspots host their diverse ecosystems on just 2.4% of the planet's surface.[2] Ten hotspots were originally identified by Myer;[1] the current 36 used to cover more than 15.7% of all the land but have lost around 85% of their area.[8] This 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.[9]

  1. ^ a b "Biodiversity Hotspots in India". www.bsienvis.nic.in.
  2. ^ a b "Why Hotspots Matter". Conservation International.
  3. ^ Myers, N. (1988). "Threatened biotas: "Hot spots" in tropical forests". Environmentalist. 8 (3): 187–208. Bibcode:1988ThEnv...8..187M. doi:10.1007/BF02240252. PMID 12322582. S2CID 2370659.
  4. ^ Myers, N. The Environmentalist 10 243-256 (1990)
  5. ^ 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
  6. ^ a b Myers, Norman; Mittermeier, Russell A.; Mittermeier, Cristina G.; da Fonseca, Gustavo A. B.; Kent, Jennifer (2000). "Biodiversity hotspots for conservation priorities" (PDF). Nature. 403 (6772): 853–858. Bibcode:2000Natur.403..853M. doi:10.1038/35002501. ISSN 0028-0836. PMID 10706275. S2CID 4414279.
  7. ^ a b "Biodiversity hotspots defined". Critical Ecosystem Partnership Fund. Conservation International. Retrieved 10 August 2020.
  8. ^ "Biodiversity Hotspots". www.e-education.psu.edu.
  9. ^ Brooks, Thomas M.; Mittermeier, Russell A.; Mittermeier, Cristina G.; da Fonseca, Gustavo A. B.; Rylands, Anthony B.; Konstant, William R.; Flick, Penny; Pilgrim, John; Oldfield, Sara; Magin, Georgina; Hilton-Taylor, Craig (August 2002). "Habitat Loss and Extinction in the Hotspots of Biodiversity". Conservation Biology. 16 (4): 909–923. Bibcode:2002ConBi..16..909B. doi:10.1046/j.1523-1739.2002.00530.x. ISSN 0888-8892. S2CID 44009934.