tropical rainforests occur in equatorial regions. this is primarily due to the effect of
Tropical rainforest Tropical rainforests are located around and near the equator, therefore having what is called an equatorial climate characterized by three major climatic parameters: temperature, rainfall, and dry season intensity.[20] Other parameters that affect tropical rainforests are carbon dioxide concentrations, solar radiation, and nitrogen availability. In general, climatic patterns consist of warm temperatures and high annual rainfall. However, the abundance of rainfall changes throughout the year creating distinct moist and dry seasons. Tropical forests are classified by the amount of rainfall received each year, which has allowed ecologists to define differences in these forests that look so similar in structure. According to Holdridge’s classification of tropical ecosystems, true tropical rainforests have an annual rainfall greater than 2 m and annual temperature greater than 24 degrees Celsius, with a potential evapotranspiration ratio (PET) value of <0.25. However, most lowland tropical forests can be classified as tropical moist or wet forests, which differ in regards to rainfall. Tropical forest ecology- dynamics, composition, and function- are sensitive to changes in climate especially changes in rainfall.[20]
Evergreen forest Tropical evergreen forests (or tropical rain forests) are usually found in areas receiving more than 234 cm of rainfall and having a monthly mean temperature of 18 Â°C or higher in the coldest months. They occupy about seven percent of the Earth's surface and harbour more than half of the planet's terrestrial plants and animals. Tropical evergreen forests are dense, multi-layered, and harbour many types of plants and animals. These forest are found in the areas receiving heavy rainfall (more than 200 cm annual rainfall). They are very dense. Even the sunlight does not reach the ground. Numerous species of trees are found in these forests. Different types of trees shed there leaves at different times of the year. Therefore, these forests always appear green and are known as evergreen forests. These forests are found in the Andaman and Nicobar Islands, along the slopes of Western Ghats and parts of Northeastern states of Assam, West Bengal and Odisha. These areas experience hot and humid climate with short dry season. The important trees of these forests are rosewood, ebony and mahogany.