Which process accelerates soil horizon mixing when earthworm populations increase?

💡 Explanation

Soil horizons mix faster due to bioturbation by earthworms because soil aggregates are dispersed by their burrowing and castings, therefore decreasing soil stratification, rather than these other strictly chemical or hydrological processes.

• Which process causes periodic debris flows across alluvial fan deposits at higher latitudes?
• Which outcome results when a meandering stream breaches its levee system during high discharge?
• Which consequence results throughout the Mississippi River Valley when glacial outburst floods deposit excess fine loess?
• Which outcome results from amplified freeze-thaw weathering in cirques?
• Which risk increases when acidic rainfall enhances mineral leaching?
• Which outcome occurs when sediment anoxia limits burrowing organisms?