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← GeographyWhich consequence results when coastal upwelling ceases near a major fishing ground?
A)Depletion of nutrient supply to phytoplankton✓
B)Increased thermocline depth and stability
C)Rise in dissolved oxygen concentrations
D)Higher rate of carbon sequestration
💡 Explanation
When coastal upwelling ceases, the nutrient transport mechanism from deep water to the surface layer is interrupted because wind-driven currents weaken, leading to a reduction in available nutrients for phytoplankton growth. Therefore, nutrient supply depletion to phytoplankton results, rather than thermocline changes, increased oxygen, or greater carbon sequestration, which depend on active upwelling.
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