The maximum biomagnification would be in which of the following in the case of an aquatic ecosystem?
Correct answer: C. Fishes
- A. Zooplankton
- B. Phytoplanktons
- C. Fishes
- D. Birds
Explanation
Heavy metals and persistent pesticides (e.g., chlorinated hydrocarbons like DDT) pass into the food chain and increase in amount per unit weight of organisms with the rise in trophic level due to their accumulation in fat. The phenomenon is called biomagnification/ bioconcentration/biological amplification, e.g., 0.003 parts per billion of DDT in water becomes 0.003 ppm in phytoplankton, 0.04 ppm in zooplankton, 0.5 ppm in clams and small fish, 2.0 ppm in predator fish and 25 ppm in fish-eating birds like seagulls.
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Ecosystems include biotic and abiotic components, food chains and webs, energy flow, nutrient cycles, populations and ecological relationships. Pollution and conservation cover air, water, soil and noise pollution, their effects on organisms, biodiversity loss, protected areas, sustainable resource use and methods for reducing environmental damage.
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