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← Nature & AnimalsWhich environmental outcome occurs when symbiotic cyanobacteria overpopulate?
A)Eutrophication and subsequent oxygen depletion✓
B)Decreased water turbidity via bioprecipitation
C)Altered temperature stratification via shading
D)Increased benthic algae photoinhibition effects
💡 Explanation
Eutrophication results when nitrogen fixation by cyanobacteria floods water systems with excess nutrients, because this overstimulates algae growth leading to oxygen depletion in the water; therefore, large growth causes eutrophication rather than bioprecipitation, stratification, or photoinhibition.
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