Which ecological risk primarily occurs when the Benguela Current's upwelling weakens?

💡 Explanation

Oxygen depletion increases because reduced upwelling decreases deep-water oxygen replenishment; the mechanism is gas exchange. Therefore, bottom sediments experience hypoxia, rather than other outcomes such as coastal erosion, which depends more on wave action.

• Which atmospheric effect is intensified by deforestation of the Amazon rainforest?
• Which outcome regarding water salinity occurs when glacial meltwater mixes with submarine groundwater discharge near coastal aquifer systems?
• Which outcome accompanies the salt crystallization weathering mechanism accelerating ventifact formation?
• Which phenomenon creates crescent-shaped oxbow lakes along meandering fluvial systems?
• Which mechanism increases sinkhole formation where groundwater extraction lowers aquifer pressure?
• Which consequence results when rainfall saturates unconsolidated pyroclastic deposits on steep volcanic slopes?