evidence: - The Ntem estuary (2 000 ha), which lies at the mouths of the following rivers: Nyong, Lokoundjé and Ntem in the South region. Cameroon’s mangrove area (UNEP, 2007) dropped from about 272 000 ha in 1980 to about 195 000 ha in 2005 (a reduction of about 30 percent over a period of 25 years, or 2 500 ha/year of mangrove loss). Some mangrove pockets in Cameroon are still relatively untouched and the most important can be found in the Rio Del Rey Estuary, the Cameroon estuary and smaller estuaries of the mouths of the Sanaga, Lokoundjé and Ntem rivers. [...] Cameroon is drained from the Adamaoua Range along four major drainage basins: Atlantic, Zaire/Congo, Niger and Chad. A watershed exists along the South Cameroon Plateau separating coastal and Congo systems. The 3960 km2 of fresh water habitats includes large natural lakes (Lake Chad), reservoirs on dammed rivers (Lagdo, Mappe, Bamindjing), crater lakes (Barombi Mbo, Nyos), large rivers (Benue, Sanaga, Cross, Mungo, Wouri, Dibamba), rainforest rivers (Nyong, Ntem, Kienke, Ndian, Lobe, Lokoundji) and thousands of km of first and second order streams (representing 86 percent of total freshwater resources).