Which impact occurs when El Niño's reduced upwelling weakens offshore ecosystems?

💡 Explanation

When El Niño diminishes upwelling, nutrient supply decreases because reduced vertical water movement affects plankton growth therefore disrupting marine food webs, forcing animals to migrate. Therefore, animal migration results, rather than other effects related to carbon cycling, fog behavior, or salinity variations that require different specific mechanisms.

• Which climate effect occurs on land bordering a subtropical gyre's eastern boundary given the current density stratification?
• Which mechanism causes tropical rainforests at latitudes near the Intertropical Convergence Zone (ITCZ)?
• Which mechanism causes deep-focus earthquakes at subduction zones along the Wadati-Benioff zone?
• Which process forms rift valleys following continental rifting?
• Which process primarily causes cyclical avulsions of a river across its alluvial fan?
• Which mechanism initiates the sudden release of stored energy during an earthquake along a transform fault?