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Tropical moist forest region in Africa From Wikipedia, the free encyclopedia
The Coastal forests of eastern Africa, also known as the East African Coastal Forests or Zanzibar–Inhambane forests, is a tropical moist forest region along the east coast of Africa. The region was designated a biodiversity hotspot by Conservation International.
The forests extend in a narrow band along the coast of the Indian Ocean, from southern Somalia in the north, through coastal Kenya and Tanzania to the mouth of the Limpopo River in southern Mozambique. The forest belt is 50 to 200 km wide, and extends further west along river valleys. They are bounded on the west by drier grasslands and savannas. Pockets of coastal forest grow on the windward eastern slopes of mountains further inland, including the Eastern Arc Mountains of Tanzania and Kenya and some inselbergs in northern Mozambique, where rainfall and dry-season humidity are higher than the adjacent lowlands.[1]
The World Wildlife Fund divides the coastal forests into two ecoregions: the Northern Zanzibar-Inhambane coastal forest mosaic, which extends from southern Somalia through coastal Kenya to southern Tanzania, and includes the islands of Zanzibar and Pemba, and the Southern Zanzibar-Inhambane coastal forest mosaic, which extends from southern Tanzania along the Mozambique coast to the mouth of the Limpopo.
Rainfall averages from 800 and 1200 mm per year in most of the coastal belt, with a well-defined dry season. Rainfall is similar to the interior savannas, but humidity in the coastal belt is higher during the dry season. A few places have higher rainfall, including the islands of islands of Unguja (Zanzibar) and Pemba and the eastern slopes of the East Usambara Mountains, and are home to rain forests.[1]
Forest was once the primary climax vegetation across most of the region. Most primary forest has been replaced by secondary wooded grassland, agriculture, and forest plantations. Frank White (1983) identified ten characteristic plant communities:[1][2]
White (1983) estimated 3000 plant species were native to the region, of which several hundred are endemic. Of 192 native forest trees recorded by White, 90, or nearly half, are endemic.[1]
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