Which mechanism causes enhanced surface phytoplankton blooms during coastal upwelling events?

💡 Explanation

When upwelling occurs, deep ocean water rises, carrying dissolved nutrients to the surface because vertical mixing transports nutrient-rich water into the photic zone where phytoplankton reside, fueling their growth. Therefore nutrient transport causes blooms, rather than increased radiation, enhanced grazing, or reduced stratification, which have opposing or negligible effects.

• Which consequence results when tephra accumulation exceeds capacity?
• Which risk significantly increases when coastal upwelling currents weaken during an El Niño event?
• Which outcome occurs when a deep-sea hydrocarbon seep experiences seismic activity?
• Which process initiates the formation of an alluvial fan deposit in arid regions?
• Which risk increases adjacent to a river reach where artificial levees have been recently constructed?
• Which risk increases when a coastal engineering project disrupts sediment transportation?