a food chain in a polluted aquatic ecosystem is given observe it and answer the following questions . freshwater _algae-fishes-birds 1which organisms are disturbed more due to biomagnefaction.why?
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ecosystem is given. Observe it and answer the following questions:
Freshwater → Algae → Fishes → Birds
(i) Which organisms are distributed more due to biomagnification? Why?
(ii) This ecosystem will be destroyed gradually due to biomagnification. Why?
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The chemicals and toxins which are released into the water bodies disrupt the food chain. The small organisms absorb the toxins which are eaten up by larger animals. These toxins, thus, get accumulated in the higher level of organisms. So, we can conclude that Birds are the organisms that are most disturbed due to biomagnification. Biomagnification refers to the accumulation of toxic substances in the food chain. The toxic chemicals that are released into the environment are absorbed by lower organisms such as plants, earthworms, etc. These chemicals are then transferred to different trophic levels when lower organisms are eaten by other organisms. The pesticides and chemicals such as DDT and mercury released into the lakes and rivers are ingested by the aquatic organisms. These get accumulated in their body tissues and are transferred to other organisms that feed on them. Since the pesticides are industrially processed they contain traces of heavy metals such as lead, arsenic, cadmium, etc. These metals have been found in the bodies of animals and humans and are believed to have an adver