Depletion of oxygen by algal blooms can actually cause the "death" of an entire ecosystem.

Question

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Algal blooms can create hypoxic or anoxic conditions when the algae die and decompose, consuming large amounts of oxygen. This can lead to the death of fish and other aquatic organisms that require oxygen to survive. As these organisms die, it can impact the entire food chain and lead to the collapse of the ecosystem.

Depletion of Oxygen by Algal Blooms Can Actually Cause the "Death