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Biodiversity hotspots. Original proposal in green, and added regions in blue. [14] Most biodiversity exists within the tropics; likewise, most hotspots are tropical. [15] Of the 36 biodiversity hotspots, 15 are classified as old, climatically-buffered, infertile landscapes (OCBILs). [16]
Megadiversity means exhibiting great biodiversity. The main criterion for megadiverse countries is endemism at the level of species, genera and families. A megadiverse country must have at least 5,000 species of endemic plants and must border marine ecosystems.
This biodiversity hotspot is known for being the home of the Sierran giant sequoia tree and its close relative the coast redwood. [1] In 1996, the Province was designated as a biodiversity hotspot allowing it to join ranks among 33 other areas in the world with many endemic species. To be named a biodiversity hotspot, an area has to contain ...
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF).
Biodiversity banking places a monetary value on biodiversity. One example is the Australian Native Vegetation Management Framework. Gene banks are collections of specimens and genetic material. Some banks intend to reintroduce banked species to the ecosystem (e.g., via tree nurseries). [217]
Most of the exponential human population growth worldwide is occurring in or close to biodiversity hotspots. [6] This may explain why human population density accounts for 87.9% of the variation in numbers of threatened species across 114 countries, providing indisputable evidence that people play the largest role in decreasing biodiversity. [18]
The Global 200 is the list of ecoregions identified by the World Wide Fund for Nature (), the global conservation organization, as priorities for conservation.According to WWF, an ecoregion is defined as a "relatively large unit of land or water containing a characteristic set of natural communities that share a large majority of their species dynamics, and environmental conditions".
Mesoamerica is considered one of many biodiversity hotspots where extinction is a significant threat. [5] This area is the world’s third largest biodiversity hotspot. [1] Some efforts have been made to protect organisms in the region, however, many of these protected sites are “small, fragmented, isolated, or poorly protected”. [4]