Which outcome occurs when coastal upwelling is disrupted by increased freshwater runoff?

💡 Explanation

When freshwater runoff increases significantly, it stratifies the water column because freshwater is less dense, reducing vertical mixing and upwelling which brings oxygen-rich water from depth. Therefore, decreased dissolved oxygen results, rather than increased plankton, stable stratification, or fewer algal blooms which require nutrient upwelling.

• Which process causes increased sedimentation rates near the mouths of fjord estuaries following glacial retreat?
• Which mechanism causes localized uplift along a strike-slip fault segment during an earthquake?
• Which hazard increases significantly after rapid drawdown from a dam reservoir situated on karst bedrock?
• In poorly drained floodplain soils, which mineral transformation is driven by fluctuating redox conditions?
• Which risk increases when a building constructed on permafrost causes thawing of ground ice at the foundation?
• Which topographic feature is primarily formed by the mechanism of solifluction in periglacial environments?