Question

Explain how the biomagnification of DDT has affected the bird population?

Answer 1

Biomagnification of DDT leads to an increase in its concentration at the higher trophic level and its higher concentration in birds leads to the disturbance in their calcium metabolism. This causes the premature breaking of eggs in birds due to thinning of eggshell. In this way, the biomagnification of DDT leads to a decrease in the bird population.