Which risk increases for coastal fisheries in the eastern Pacific Ocean when El Niño suppresses upwelling?

💡 Explanation

When El Niño suppresses upwelling, nutrient transport from the deep ocean is reduced because weakening trade winds reduce the pressure gradient. This leads to a decrease in primary productivity. Therefore nutrient depletion and subsequent fish stock collapse results, rather than algal blooms, mining disruptions, or predation changes which depend on other processes.

• Which atmospheric effect causes the deflection of prevailing winds, leading to the formation of gyres in ocean basins?
• Which consequence results when increased acidity accelerates limestone dissolution underground?
• Which erosional feature primarily forms adjacent to playas because of prevailing winds?
• Which outcome will accelerate glacial retreat when volcanic ash deposits darken ice surfaces?
• Which outcome occurs from low-pressure cell formation influenced by the Coriolis effect?
• Which risk increases when seismic waves encounter a soil layer with high pore water pressure during an earthquake?