Which one of the following ecosystem types has the highest annual net primary productivity?
Which one of the following ecosystem types has the highest annual net primary productivity?
tropical deciduous forest
temperate evergreen forest
temperate deciduous forest
tropical rain forest.
Solution
Productivity of tropical rainforests is the highest. The tropical rainforests coveringan area of $3,00,000 \mathrm{~km}^2$ contain more than $50 \%$ of the total flora and fauna of the world. They are found in the equatorial regions rainfall exceeds $140 \mathrm{~cm}$. The warm humid climate supports broad leaved evergreen plants. Productivity is very high and the vegetation show stratification into two or more well defined layers.