Tropical forests are biomes with the highest productivity and variety of species on the planet.
They are also called tropical rainforest or humid forest due to the high rainfall in the regions where they are located.
They receive this name because they are located between the tropics of Cancer and Capricorn.
Main features
The main characteristics of tropical forests are: the presence of tall trees, the hot climate and the high rainfall. The average temperature reaches 20 ºC and it rains about 1,200 millimeters per year.
Despite supporting a huge variety of plants, the soils of tropical forests are poor. Its productivity is guaranteed by the great availability of water and high temperature. In addition, the necessary nutrients are found mostly in the biomass of the living trees themselves than in the soil.
The decomposition process of organic matter is extremely fast in tropical forests and this is what guarantees the cycling of nutrients. This condition is essential to maintain the functioning of this complex ecosystem .
Location
Tropical rainforests are found in Africa, Asia and Central and South America. They occur mainly in four regions, which are called biogeographic domains, namely:
- Afrotropical : located on the African continent, Madagascar and scattered islands;
- Australia : located in Australia, New Guinea and the Pacific Islands;
- Indomalase : located in India, Sri Lanka, Asia and Southeast Asia;
- Neotropical : located in South America, Central America and the Caribbean islands.
The largest tropical forest regions are concentrated in South America with the Amazon and in the African and Southeast Asian regions.
The largest tropical forest in the world is the Amazon Rainforest . This biome is home to an enormous diversity of life forms and the largest availability of fresh water in the world.
Flora
The flora of the tropical forest is rich and abundant, with evergreen and evergreen leaves. The vegetation cover is dense and forms a true green carpet.
At some points it is possible to find up to 300 tree species in 0.1 hectare of forest.
It is common to find lianas and epiphytic plants. Lianas are woody vines that take root in the ground, while epiphytes grow under other plants where they develop their roots.
The plants carnivorous are very common in tropical forests, especially due to its humid climate.
Fauna
Among the animal species of tropical forests, the variety of insects and other invertebrates stands out.
Some animals typical of tropical forests are:
- Golden lion tamarin ;
- Jaguar ;
- Capybara;
- Otter ;
- Manatee ;
- Macaws;
- Toucans.
Composition
Tropical forests are divided into distinct strata and vary from forest to forest. Are they:
- Sky : The layer called “sky” covers the crowns of spaced trees and their branches. In this stratum are the emergent trees over 40 m high and which extend beyond the forest canopy.
- Canopy : Also called “canopy” is formed by trees of short spacing and high density.
- Understory : Shrubs are the characteristic of the “shrub layer”, with smaller trees, 5 to 20 meters above the floor.
- Herbaceous : The “soil layer” contains the smallest vegetation, in addition to fallen trunks and fungi. It is characteristic for being a dark and humid place, where the decomposition process of organic matter occurs.