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← GeographyWhich change would most impede oceanic uptake of CO2 during plankton blooms within a coastal gyre environment?
A)Increased sea surface water stratification✓
B)Enhanced zooplankton grazing pressure
C)Reduced riverine nutrient input volumes
D)Greater upwelling water depth extents
💡 Explanation
Increased stratification inhibits vertical mixing, restricting nutrient supply via turbulent diffusion to surface waters; therefore, bloom intensity decreases, reducing CO2 uptake, because productivity is nutrient-limited, rather than boosted by influx from upwelling.
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