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A biodiversity hotspot is a biogeographic region with significant levels of biodiversity that is threatened by human habitation. [1] [2] ...
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.
Biodiversity hotspots across the world Several international organizations focus their conservation work on areas designated as biodiversity hotspots . According to Conservation International , to qualify as a biodiversity hotspot a region must meet two strict criteria:
Biodiversity generally tends to cluster in hotspots, [8] and has been increasing through time, [9] [10] but will be likely to slow in the future. [ 11 ] Estimates on the number of Earth's current species range from 10 million to 14 million, [ 12 ] of which about 1.2 million have been documented and over 86 percent have not yet been described ...
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]
Biodiversity is most commonly used to replace the more clearly-defined and long-established terms, species diversity and species richness. [13] However, there is no concrete definition for biodiversity, as its definition continues to be defined. Other definitions include (in chronological order):
Frank White (1983) identified ten characteristic plant communities: [1] [2] Zanzibar-Inhambane lowland rain forest It found mostly in Tanzania, on the windward (east-facing) slopes of the Uluguru , Nguru , and Usambara Mountains , and in parts of Ulanga and Iringa districts.
These bioregions were used for conservation research and planning. They were defined in the South African National Spatial Biodiversity Assessment of 2004. The South African National Spatial Biodiversity Assessment of 2011 amended this to reduce the number of regions to four inshore and two offshore and rename them as ecoregions.