Which outcome occurs when deep ocean upwelling weakens during El Niño?

💡 Explanation

Coastal productivity decreases because of reduced nutrient supply via upwelling; this suppression is due to decreased trade winds and thermocline changes during El Niño slowing nutrient transport; therefore ecosystem productivity plummets close to shore, rather than offshore because the current change impacts coastal regions directly.

• Which outcome occurs when seasonal flooding delivers excess sediment onto an alluvial plain?
• Which mechanism accelerates sea stack erosion in temperate zones?
• Which outcome develops as Lateral Erosion narrows an oxbow lake neck to the point of breaching during floods?
• Which process creates elevated island ridges as lava cools intensely?
• Which risk increases when topsoil bioturbation exceeds threshold rates?
• Which risk increases when constructing structural foundations on sloping alluvial deposits?