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Oxisols are a soil order in USDA soil taxonomy, best known for their occurrence in tropical rain forest within 25 degrees north and south of the Equator. In the World Reference Base for Soil Resources (WRB), [1] they belong mainly to the ferralsols, but some are plinthosols or nitisols. Some oxisols have been previously classified as laterite ...
Amazon River rain forest in Peru. Tropical rainforests are hot and wet. Mean monthly temperatures exceed 18 °C (64 °F) during all months of the year. [4] Average annual rainfall is no less than 1,680 mm (66 in) and can exceed 10 m (390 in) although it typically lies between 1,750 mm (69 in) and 3,000 mm (120 in). [5]
Latosols are tropical soils, but not all soils in the tropics are latosolic. [2] Latosols are red or yellowish-red in colour throughout and they do not have distinct horizons like a podsol. The red colour comes from the iron oxides in the soil. They are deep soils, often extending 20–30 m (66–98 ft) deep whereas podsols are 1–2 m (3 ft 3 ...
Tropical and subtropical coniferous forests are characterized by diverse species of conifers, whose needles are adapted to deal with the variable climatic conditions. [1] Most tropical and subtropical coniferous forest ecoregions are found in the Nearctic and Neotropical realms , from Mexico to Nicaragua and on the Greater Antilles , Bahamas ...
About half of the world's tropical rainforests are in the South American countries of Brazil and Peru. Rainforests now cover less than 6% of Earth's land surface. Scientists estimate that more than half of all the world's plant and animal species live in tropical rainforests.
In waterlogged soils, the rainforest flora gives way to Melaleuca thickets, and on poor soils and in drier areas Eucalyptus becomes dominant. The rainforest flora is intolerant of fire, and where periods of drought have allowed devastating fires, the rainforest flora has retreated, allowing fire-tolerant Eucalyptus to become established. If a ...
But the creation of the plantations came at a steep price. To make way for those industrial fields of palm trees, some 30,000 acres of rainforest were cut down, a swath of destruction that one ...
This type of forest often includes bamboo and teak as the dominant large tree species, such as in the Phi Pan Nam Range, part of the Central Indochina dry forests. [11] They are affected by often long seasonal dry periods and, though less biologically diverse than rainforests, tropical dry forests are home to a wide variety of wildlife.