Mercury is one of the most serious contaminants in a particular lake. The accumulation of it is highest in

This phenomenon of biomagnification is well known for mercury and DDT. In the water, plants and small organisms like plankton take up mercury through passive surface absorption or through food intake. Methylmercury biomagnifies through the food chain as predators eat other organisms and absorb the contaminants that their food sources contained. In the given food chain maximum accumulation is seen in fish eating birds. But the top predator is man. Hence man who consumes these birds would have highest amount of mercury.