Which ecological outcome occurs when deep ocean upwelling declines?

💡 Explanation

Reduced upwelling diminishes nutrient access to aquatic ecosystems, because currents transport essential minerals; `nutrient limitation` impedes plankton reproduction; therefore, plankton decreases rather than increases, assuming the existing food web depended on upwelling.

• Which process primarily causes the rounded shape of cirque basins after glacial retreat?
• Which outcome occurs when freeze-thaw cycles induce solifluction on a hillslope supporting pipeline infrastructure?
• Which outcome is accelerated when increased wave energy weakens sedimentary rock?
• Which risk increases when an oceanic plate subducts beneath a continental plate with high sediment cover?
• Which risk increases within flood control channels constructed atop karst bedrock regions?
• Which outcome occurs when the North Atlantic gyre slows its circulation?