Excessive accumulation of organic matter in water bodies leads toA. Decrease in species diversityB. Increase in species diversityC. Green house effectD. No effect on species diversity

Excessive accumulation of organic matter in water bodies leads toA. De

1.	Excessive accumulation of organic matter in water bodies leads toA. Decrease in species diversityB. Increase in species diversityC. Green house effectD. No effect on species diversity
Answer» Correct Answer - A Organic matter (organic wastes) contains a number of pathogen, secondary pollutant, pesticides etc. Biological oxygen demand becomes high, and therefore the dissolved oxygen reduced. Hence, planktons Mollusca and fishes will be eliminated due to reduced dissolved oxygen and presence of secondary pollutants. Some species like annelid worm Tubifex and some insect larvae (Chironomus) tolerate pollution

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Excessive accumulation of organic matter in water bodies leads toA. Decrease in species diversityB. Increase in species diversityC. Green house effectD. No effect on species diversity

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