Question

why in an aquatic food chain,maximum DDT is found in fish-eating birds?​

Answer 1

Answer:

DDT is a non biodegradable chemical . It is not metabolized by the body and therefore gets accumulated .

Its concentration keeps on increasing at successive trophic levels . Organisms at higher trophic level consume DDT whenever they eat organisms present at lower trophic level .

Since , the biomass at each level decreases therefore the concentration of DDT increases .

So , maximum DDT is found in fish-eating birds .

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Answer 2

$\huge\tt\red{Answer}$

.High concentrations of DDT disturb calcium metabolism in birds, which causes thinning of eggshell and their premature breaking, eventually causing a decline in bird populations.