Question

A Crane had DDT level of 5 ppm in its body. What would happen to the population of such birds?

Answer 1

Some toxic substances aren't metabolized or excreted from an organism's body. This leads to an accumulation of these intoxicants at successive trophic levels, this is called as biomagnification. In a crane having 5 ppm of DDT concentrated in its body, calcium metabolism is disrupted. This causes thinning and weakening of eggshells and premature breaking of eggs resulting in a significant decrease in their population.