Which phenomenon occurs when coastal upwelling is reduced within the center of an oceanic gyre?

💡 Explanation

When upwelling is reduced, nutrient replenishment to the surface waters of the gyre diminishes because the nutrient transport mechanism is weakened, leading to decreased phytoplankton growth and overall lower productivity. Therefore nutrient depletion results within affected localized areas as other options don't directly relate to upwelling.

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