The tropical rainforest is made up of a dense network of trees, shrubs and vegetation.
This zone on earth is the most biodiverse on the earth surface. It receives the highest insolation of all places on earth and so radiant energy here is very high.
Due to this, the net productivity is very high.
This implies that a wide range of food is available to support the diverse organisms.
Also, the wet and dry seasons provides a very conducive weather for most organisms to survive.
Tundra and deserts have low precipitation and the conditions are very harsh.
