Brazil - Serra do Divisor National Park

Area: 843.012,28 hectares- Perimeter: 809,04 Km Climate: hot and humid tropical, with one to two month dry season. temp: 24°year average pluv: 1.750 to 2.000 mm total /year Altitude: 200-600 m. Geomorphology: Hilly and mountainous with large alluvial plains and some low tabular plateau's. Separating the two basins of Rio Ucayali (Peru) and Jurua (Brazil), the Park shelters main sources of Jurua 's left margin affluent. It is structured in four main hill massifs (Serras da Jaquirana, do Moa, do Jurua-Mirim & do Rio Branco), separated by flat plains and valleys of the corresponding affluent of the Jurna basin. Margins of the lower section of the Jurua and Moa rivers are regularly to permanently !éinundated, having lots of lakes, igapo's and igarapé's. Higher up, are found some tabular well drained area's (250 m). Higher still, the landscape is mostly made of hills of up to 300 m with poorly marked valleys. The four sierra's culminate up to 600 m, with asymmetric limestone crests dividing the basins. Vegetation Rapid ecological assessment survey in 1991 characterised 10 forest types within the Park and record biodiversity. Most of the area is covered by Open rainforest with palm-trees or bamboo's, Dense and Open sub-mountain rainforests, and Dense and Open alluvial rainforests (Periodically-inundated forests).