Amazon River and Flooded Forests
About the Area
Essential for the reproduction of many floodplain trees is the dispersal of their seeds by fruit-eating animals, including several fish species. This cycle of flooding, and the annual regeneration that it produces, represent a globally outstanding ecological phenomenon.
The entire Amazon basin contains the largest number of freshwater fish species in the world, with an estimated number of over 3000 species. A few of the characteristic fishes of this ecoregion are the fruit-eating Tambaqui (Colossoma macropomum), Arawana (Osteoglossum bicirrhosum), Pirarucu (Arapaima gigas), Arapaima (Arapaima gigas), Dourada catfish (Brachyplatystoma flavicans), and one of the world's few surviving lungfishes - Lepidosiren paradoxa and Tucunaré (Cichla acellaris).
Mammals include Pink river dolphin or boto (Inia geoffrensis), Grey river dolphin or tucuxi (Sotalia fluviatis), Manatee (Trichecus inunguis), and the rare Uakari (Cacajao calvus). The largest river turtle in South America, Podocnemis expansa, is also found here, as is the highly endangered Black caiman (Melanosuchus niger).
In the flooded forests, selective logging of the kapok tree and virola is accelerating deforestation and wiping out populations of the above species over large regions. Open floodplains are being converted for cattle ranching, which can include introduced water buffalo (Bubalus bubalis).
Other threats include: overfishing - particularly of the largest species; mercury pollution from gold mining in smaller streams; increasing population centers and the resultant untreated sewage; construction of roads and dams that have the potential to block species movements and alter hydrology.
840,000 sq. km (336,000 sq. miles)
North-central South America: Brazil, Columbia, and Peru