Biodiversity Hotspots Revisited, Conservation International, 2004

Sep 13, 2010
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Description:
The biodiversity hotspots are regions known to hold especially high numbers of species found nowhere else, yet their remaining habitat combined covers a little more than two percent of Earth's land surface. According to the criteria developed by Myers et al. (2000), a hotspot must meet two thresholds in order to qualify: 1) it must have at least 1500 endemic, native vascular plant species, and 2) it must have already lost at least 70% of its primary, native vegetation. In the updated analysis, Mittermeier et al. (2004) recognize 34 hotspots which together hold 50% of the world's plant species and 42% of all terrestrial vertebrates as endemics. As evidence of their urgency for global conservation, hotspots also hold exceptionally high numbers of threatened vertebrates, including 50% of threatened mammals, 73% of threatened birds and 79% of threatened amphibians as endemics. There are an estimated two billion people living in the hotspots, with 300 million people within less than 10 km of existing protected areas.
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Conservation Synthesis, Center for Applied Biodiversity Science at Conservation International
Content date:
not specified
Citation:
Title: Biodiversity Hotspots Revisited, Conservation International, 2004
Credits: Conservation Synthesis, Center for Applied Biodiversity Science at Conservation International
Publication Date: 2004
Online Linkages: Other Citation Info: Mittermeier, R. A., Robles-Gil, P., Hoffmann, M., Pilgrim, J. D., Brooks, T. B., Mittermeier, C. G., Lamoreux, J. L. & Fonseca, G. A. B. 2004. Hotspots Revisited: Earth�s Biologically Richest and Most Endangered Ecoregions. CEMEX, Mexico City, Mexico 390pp.
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Conservation International
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