AMAZON RAINFOREST
The call “Amazonía or amazon rainforest” it corresponds to the ecological region characterized by their tropical, dense and humid forest. This forest type is in Bolivia, Brazil, Colombia, Ecuador, Guyana, Peru, Suriname and Venezuela, covering the basins of the River Amazons and Tocantins. Their territorial extension is approximately of 7 584 421 km2. The amazonia is a selection genetic bank, for what considers it to him the reservation more important biótica of the world. It possesses the biggest quantity in alive matter for unit of surface of the world. The diversity of the amazon forest can end up having from 150 to 312 species of trees for hectare, in contrast with 3 to 15 species for hectare in the temperate forests.
Their main river, the Amazons, crosses the countries of Colombia, Brazil, Peru and Venezuela; it is the longest second in the world with 6.275 kilometers, its outlet is of 240 km wide. The bank distance to bank is between 10 and 50 km and it penetrates in the sea 320 km. Their flow oscillates among 31 to 141 million liters per seconds in its outlet, dragging 3 million tons for day of silts.
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