Biomagnification of DDT

Biomagnification of DDT When non-degradable substances enter the food chain, they do not get metabolized or broken down or expelled and instead get transferred up the tropic levels of the food chain. During this process, they show an increase in concentration which is referred to as biomagnification . This results in increased toxicity and may even be lethal. This phenomenon is well established for mercury and DDT. Fig . schematically shows biomagnification of DDT in an aquatic food chain where the concentration of DDT is enhanced at successive trophic levels.