Which ecological impact results when upwelling weakens substantially along the Peruvian coast?

💡 Explanation

When upwelling weakens, nutrient-rich deep water is not transported to the surface because wind-driven forces diminish, decreasing phytoplankton production and disrupting the food web that supports anchovy populations. Therefore anchovy population survival is reduced, rather than increased coral bioaccumulation, mangrove expansion, or algal blooms which require different nutrient conditions.

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