Which mechanism causes increased phytoplankton productivity due to upwelling circulation?

💡 Explanation

When upwelling occurs, nutrient transport to surface waters is driven by the upward movement of cold, nutrient-rich water, fostering phytoplankton growth. Therefore nutrient transport results, rather than radiation penetration, temperature instability, or carbon dioxide absorption, which are secondary or unrelated effects.

• Which consequence results when increased sediment load overwhelms channel capacity in a proglacial stream?
• Which consequence results when groundwater extraction increases behind a barrier island?
• Which effect does the Coriolis force primarily have on large-scale ocean currents, leading to gyre formation?
• Which risk increases when roads are constructed across regions with active solifluction?
• Which outcome occurs when tectonic stress exceeds bedrock strength?
• Which phenomenon increases when topsoil experiences reduced throughflow?