The tropical rain forest is a forest which occurs in the area of rain forest climate in which their is no dry season. All months have an average precipitation of 60 mm; and it is marked by large evergreen trees that forms a canopy.
The hot and humid conditions make tropical rain forests an ideal environment for bacteria and other microorganisms. Because these organisms remain active throughout the year, they quickly decompose matter on the forest floor. In other biomes, such as the deciduous forest, the decomposition of leaf litter adds nutrients to the soil