Which mechanism accelerates lake eutrophication when agricultural runoff contains excessive nutrients?

💡 Explanation

When agricultural runoff containing excessive nutrients enters a lake, algal blooms occur because the nutrients stimulate rapid algae growth, the decomposition of which consumes oxygen, depleting it and harming the aquatic ecosystem. Therefore, algal bloom induced oxygen depletion results, rather than sedimentation, thermal stratification, or decreased clarity which exert different effects on the lake ecosystem.

• Which geological consequence results when accumulated stress overcomes frictional resistance along a fault-line?
• Which process limits the height of topographic features along a transform fault boundary?
• Which process primarily causes oxbow lake sediment infill after river meander cutoff?
• Which risk increases when a river's flow encounters highly erodible alluvial sediments during seasonal floods?
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