Construct a pyramid of numbers by taking suitable examples for each trophic level in an ecosystem.

Question

a. Construct a pyramid of numbers by taking suitable examples for each trophic level in an ecosystem. 

b. Explain why a progressive decline is seen in the population size from the first to the fourth trophic level in the above pyramid.

Answer 1

Pyramid of numbers in a grassland ecosystem

b. Amount of energy decreases at successive trophic levels resulting into decreasing in number of organisms.