Frequent occurrence of water blooms in a lake | vedclass

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(C) Water blooms are caused by the excessive growth of planktonic algae in water bodies.This phenomenon is primarily triggered by the enrichment of wa

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Excessive nutrient availability

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(C) Water blooms are caused by the excessive growth of planktonic algae in water bodies.This phenomenon is primarily triggered by the enrichment of water with nutrients like nitrogen and phosphorus,often originating from sewage or agricultural runoff,a process known as eutrophication.While the algae bloom itself produces oxygen during the day,the subsequent death and decomposition of this massive amount of organic matter by microorganisms consume large quantities of dissolved oxygen.This leads to a severe depletion of $O_2$ levels,which is detrimental to aquatic animals.Therefore,while water blooms are a direct result of excessive nutrient availability (eutrophication),the most critical ecological consequence that affects the lake's survival is the resulting oxygen deficiency.

Frequent occurrence of water blooms in a lake indicates

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