freshwater/algae/fish/brids this ecosystem gradually due to magnification why
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The harmful chemicals are absorbed by the animals of one trophic level and then repeatedly passed on to that of the successive trophic levels this is known as biological magnification
The degree varies from one trophic level to another
It's highest at the topmost trophic level that's quaternary consumers or top carnivores
It's lowest at the bottom most trophic level that's producers or plants
Example : Industrial chemicals - water bodies - algae - fish - birds
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