. The Conservation Atlas of Tropical Forests: Africa. Congo IRIi] Dryland forest ^ Swomp forest [JJUI Grossland/forest mosaic I I Predominantly grassland Kouilou-. (atorocles Plateau Figure The regions of the Congo (.Source: V\CN, 19Q0) The Forests There are two main types of moist forest in the Congo: swamp forest and dry lowland forest. The latter is found mostly on the massifs of the Mayombe and Chaillu in the south and in Sangha in the north-west. The swamp forests are found in the north-east in the Cuvette Congolaise. In the south, the forests of the Mayombe are mostly semi-decid- uo


. The Conservation Atlas of Tropical Forests: Africa. Congo IRIi] Dryland forest ^ Swomp forest [JJUI Grossland/forest mosaic I I Predominantly grassland Kouilou-. (atorocles Plateau Figure The regions of the Congo (.Source: V\CN, 19Q0) The Forests There are two main types of moist forest in the Congo: swamp forest and dry lowland forest. The latter is found mostly on the massifs of the Mayombe and Chaillu in the south and in Sangha in the north-west. The swamp forests are found in the north-east in the Cuvette Congolaise. In the south, the forests of the Mayombe are mostly semi-decid- uous and account for almost 3 per cent of Congo's territory. They are biologically extremely rich, and contain important timber species such as Aiicoiiiiiea kUiiiicaiia, Staitdlia gahonensis, Dacryodes spp., Naiidea didenichii and P\>cnanlhus angoknsis, which are widely dis- tributed. Tcriniiitilici siipcrbci, Berlinia grandifolia and Oxvstigiiia phyllmn are also important, but are more restricted in distribution. Forests on the Chaillu massif are partially deciduous and comprise 11 per cent of the country. These forests are dominated by Aucownea klaineana, Terminalia superba and Enlandwphragma utile. This region also has a particularly high abundance oi Lovoa trichilioides. The rain forests of northern Congo are also partially deciduous and are rich in the following groups of plants: Meliaceae (Enrandwphragiiia cylindricuin, E. candollei, E. utile, E. angolense, Khaya anthotheca, Guarea spp.), and Leguminosae {Piptadcnias- trum africatium, Pterocarpus soyauxii, Etythrophleum spp.). Other groups, such as Irvingiaceae, are distributed throughout the forest, while species such as Terminalia superba (frake) and Tnplochiton scleroxylon (ayous) are locally abundant. These forests, which occupy 31 per cent of the country's surface area, present a number of interesting transition zones with the semi- deciduous Sterculiaceae-Ulmaceae forests of Cameroon, the mesophile forests of


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