Status and Trends of Biodiversity
Overview
As of 2003 the numbers and distribution of species found in Tanzania is: 10,008 plant species, 316 mammals, 229 breeding birds, 335 reptiles, 116 amphibians and 331 fish species. The status and trends of some components of biological diversity in the country include: the Indian Ocean Dugong (Dugong dugon) at the brink of extinction; the number of elephants has increased from 88,000 in 2000 to 120,000 in 2004; number of wildlife researchers has increased from 40 to about 105 by 2004; and there are 79 indigenous horticultural plant species (including 48 introduced fruit trees, 37 introduced vegetable crops and 40 indigenous vegetable crops). Some of the factors affecting biodiversity and its conservation include: poverty, inadequate information on genetic resources, inadequate awareness of communities on biodiversity conservation, unsustainable mining activities by small scale miners, influx of refugees, introduction of alien species {e.g. Nile perch (Lates niloticus), water hyacinth (Eichhromia crassipes)}, some illegal fishing, cultural belief, degradation of water quality, deforestation, illiegal hunting, unplanned human settlement developments and livestock migration.
Number and Extent of Protected Areas
A total area of 17,449 sq km has been designated as protected area. There are 12 National Parks and 2 proposed National Parks, 34 Game Reserves, 1 Conservation Area, 1 Biosphere Reserve, 3 World Heritage Sites and 43 Game Controlled Areas. A more specific example is Rufiji where there are 1,160 sq km of Mangroves and several wetland areas.