Which ecological outcome occurs when coastal upwelling currents are significantly reduced?

💡 Explanation

When upwelling is reduced, nutrient transport to surface waters declines because nutrient-rich deep water mixes less with surface layers, limiting nutrient enrichment needed for phytoplankton growth. Therefore phytoplankton blooms decrease significantly, rather than increased oxygen, reef development or decreased acidity, because upwelling supplies essential nutrients depleted in the surface.

• Which process primarily dictates sediment sorting along coastlines during longshore drift?
• Which process primarily causes levee failure during prolonged heavy rainfall events?
• Which process predominantly shapes the bathymetry of a fjord immediately after deglaciation?
• Which landform characteristic increases when glacial abrasion exceeds deposition?
• Which process dominates within a high-altitude cirque basin experiencing repeated freeze-thaw cycles?
• Which outcome reduces floodplain biodiversity following levee construction?