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The Iquitos várzea (NT0128) is an ecoregion of flooded forest along rivers in Brazil, Peru and Bolivia in the west of the Amazon biome. The forest is seasonally flooded up to 7 metres (23 ft) by whitewater rivers carrying nutrient-rich sediment from the Andes. The meandering rivers often shift course, creating a complex landscape of oxbow ...
Freshwater swamp forests are a relatively understudied forest type in Southeast Asia, primarily because they are difficult to access and can harbor diseases spread by insects, such as mosquitoes. [35] In the Amazon Basin of Brazil, a seasonally flooded forest is known as a várzea, and refers to a whitewater-inundated forest.
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A várzea forest is a seasonal floodplain forest inundated by whitewater rivers that occurs in the Amazon biome. [ 1 ] [ 2 ] Until the late 1970s, the definition was less clear and várzea was often used for all periodically flooded Amazonian forests.
Half of the ecoregion is in use for agriculture. About 20% is forested, mostly in deciduous trees due to the seasonal flooding. Two types of forests are associated with the Tonle Sap floodplains: a stunted swamp forest around the lake (about 10% of the area), and a short tree shrubland for the larger outlying areas. [1]
There are many rivers and flooded areas, but most of the vegetation is terra firme forest, not subject to flooding. [1] The ecoregion is part of the Río Negro-Juruá Moist Forests, a global ecoregion, the other parts being the Negro–Branco, Solimões–Japurá and Caquetá moist forests. The reasonably intact global ecoregion has high annual ...
It has two main areas: the Trombetas/Negro plateau and the lower western Amazon plateau. The higher area has hills with flat tops at 150 to 200 metres (490 to 660 ft) cut by valleys, while the lower area has altitudes of about 100 metres (330 ft). There are large areas of seasonally flooded land with poor drainage, and some permanent lakes. [4]
Igapó (Portuguese pronunciation:, from Old Tupi: "root forest") is a word used in Brazil for blackwater-flooded forests in the Amazon biome. These forests and similar swamp forests are seasonally inundated with freshwater. They typically occur along the lower reaches of rivers and around freshwater lakes.