Which risk increases when coastal upwelling declines within an ocean gyre?

💡 Explanation

A decline in upwelling within an ocean gyre reduces nutrient supply, and thus reduces phytoplankton blooms, because nutrient transport is cut-off via the mechanism of nutrient limitation in the mixing layer; therefore reduced blooms, rather than deep-sea impacts, are the direct consequence.

• Which phenomenon causes enhanced primary productivity following coastal upwelling events?
• Which outcome results from stream meandering affecting drainage divergence?
• Which atmospheric effect sharply defines subtropical high-pressure zones around 30 degrees latitude?
• Which landscape outcome characterizes areas undergoing increased deflation?
• Which outcome enhances playa lake formation by aeolian fluxes?
• Which outcome occurs when lithospheric plates subduct irregularly?