Earthworm activity affects tropical soil layers. Which outcome directly results when bioturbation is significantly reduced?

💡 Explanation

Nutrient depletion accelerates via slower nutrient cycling from deeper layers because bioturbation mixes organic matter; reduced earthworm action prevents this mixing. Therefore, soil fertility declines rather than increases, because nutrient distribution depends on biological cycling.

• Which risk markedly increases along barrier islands trending parallel if rising sea temperatures reduce ice sheet albedo?
• Which phenomenon weakens the North Atlantic Current when Arctic sea ice melt intensifies?
• Which process causes increased deposition of alluvial sediment at a river delta when average sea level rises steadily?
• Which mechanism causes increased stream meandering in a region experiencing decreased vegetation density?
• Which increased occurrence accompanies divergence in upper-level air streams?
• Which risk increases when coastal sediment transport stops due to a dam interrupting longshore drift?