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.

• Which mechanism causes a stable fjord estuarine circulation when freshwater runoff surges in spring?
• Which mechanism primarily contributes to the steep walls observed surrounding fjords?
• Which risk increases as rising global temperatures accelerate permafrost thaw?
• Which mechanism amplifies magma production beneath island arc volcanoes during subduction?
• Which erosion outcome primarily results when exposed granite undergoes chemical alteration?
• Which mechanism causes increased stream meandering in regions experiencing permafrost thaw?