Which process limits nutrient availability despite large oceanic gyre circulation?

💡 Explanation

When surface waters warm and become less dense, thermal stratification strengthens because density differences resist vertical mixing, inhibiting upwelling of nutrient-rich deeper waters into the euphotic zone. Therefore surface stratification limits nutrient availability, rather than toxicity, pollution, or salinity which have different primary effects.

• Which deformation occurs when seismic waves pass through different rock types near a transform fault?
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• Which outcome results when differential erosion impacts stacks?
• Which mechanism controls tephra dispersal during explosive eruptions?
• Which consequence results when coastal upwelling ceases near a major fishing ground?
• Which risk escalates when ephemeral stream discharge exceeds capacity on arid-region alluvial fans?