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← GeographyWhich outcome occurs when coastal upwelling is significantly reduced due to decreased wind stress?
A)Increased surface water salinity levels
B)Nutrient depletion in the photic zone✓
C)Enhanced stratification of water layers
D)Decreased dissolved oxygen concentrations
💡 Explanation
When wind stress decreases, reduced upwelling diminishes the vertical transport of nutrient-rich deep water to the surface because wind-driven water displacement is weaker, limiting nutrient replenishment in the photic zone. Therefore nutrient depletion results, rather than increased salinity, enhanced stratification, or decreased oxygen concentrations which require different current or mixing mechanisms.
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