Which outcome primarily occurs due to weakened gyre circulation?

💡 Explanation

Reduced gyre circulation weakens the Ekman transport, decreasing upwelling of nutrient-rich waters to the surface because convergence is reduced, therefore declining vital nutrient availability for marine ecosystems, rather than causing the stated alternatives related to stratification, coastal erosion, or positive feedback cycles.

• Which outcome commonly occurs when rapid groundwater extraction lowers water tables near limestone caves?
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