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” (1988),[3] and 1990[4] revised after thorough analysis by Myers and others “Hotspots: Earth’s Biologically Richest and Most Endangered Terrestrial Ecoregions”[5] and a paper published in the journal Nature.[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 0.5% or 1,500 species of vascular plants as endemics, and it has to have lost at least 75% of its primary vegetation.[6] Around the world, 36 areas qualify under this definition.[7] These sites support nearly 60% of the world's plant, bird, mammal, reptile, and amphibian species, with a very 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] however, the area defined as hotspots covers a much larger proportion of the land. The original 25 hotspots covered 11.8% of the land surface area of the Earth.[1] Overall, the current hotspots cover more than 15.7% of the land surface area, but have lost around 85% of their habitat.[8] This loss of habitat explains why approximately 60% of the world's terrestrial life lives on only 2.4% of the land surface area.

Hotspot conservation initiatives

Only a small percentage of the total land area within biodiversity hotspots is now protected. Several international organizations are working in many ways to conserve biodiversity hotspots.

By the influence of that the central government of India arrived a new authority named CAMPA (Compensatory Afforestation Fund Management and Planning Authority) to control the destruction of forests and biological spots in India.

Distribution by region

Biodiversity hotspots. Original proposal in green, and added regions in blue.
Biodiversity hotspots. Original proposal in green, and added regions in blue.

North and Central America

The Caribbean

South America

Europe

Africa

Central Asia

South Asia

Southeast Asia and Asia-Pacific

East Asia

West Asia

Critiques of "Hotspots"

The high profile of the biodiversity hotspots approach has resulted in some criticism. Papers such as Kareiva & Marvier (2003)[15][citation needed] have argued that the biodiversity hotspots:

A recent series of papers has pointed out that biodiversity hotspots (and many other priority region sets) do not address the concept of cost.[17] 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. 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

References

  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: 187–208. doi:10.1007/BF02240252.
  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. ^ [1] Archived August 8, 2007, at the Wayback Machine
  10. ^ "Conservation International" (PDF). The Biodiversity Hotspots. 2010-10-07. Archived from the original (PDF) on 2012-03-27. Retrieved 2012-06-22.
  11. ^ "Conservation International". The Biodiversity Hotspots. 2010-10-07. Archived from the original on 2012-03-20. Retrieved 2012-06-22.
  12. ^ "Resources". Biodiversityhotspots.org. 2010-10-07. Archived from the original on 2012-03-24. Retrieved 2012-06-22.
  13. ^ "North American Coastal Plain". Critical Ecosystem Partnership Fund. Retrieved 7 February 2019.
  14. ^ Noss, Reed F.; Platt, William J.; Sorrie, Bruce A.; Weakley, Alan S.; Means, D. Bruce; Costanza, Jennifer; Peet, Robert K. (2015). "How global biodiversity hotspots may go unrecognized: lessons from the North American Coastal Plain" (PDF). Diversity and Distributions. 21 (2): 236–244. doi:10.1111/ddi.12278.
  15. ^ Kareiva, P. and M. Marvier (2003) Conserving Biodiversity Coldspots, American Scientist, 91, 344-351.
  16. ^ Daru, Barnabas H.; van der Bank, Michelle; Davies, T. Jonathan (2014). "Spatial incongruence among hotspots and complementary areas of tree diversity in southern Africa". Diversity and Distributions. 21 (7): 769–780. doi:10.1111/ddi.12290.
  17. ^ Possingham, H. and K. Wilson (2005) Turning up the heat on hotspots, Nature, 436, 919-920.

Further reading