Which mechanism causes the transformation of an oxbow lake into a marsh environment over time?

💡 Explanation

When agricultural runoff enters oxbow lakes, eutrophication occurs because nutrients increase algae growth, leading to oxygen depletion and increased sedimentation, resulting in shallower water suitable for marsh vegetation. Therefore a marsh transition, rather than rebound, fracturing, or seismic effects which involves unrelated geological mechanisms.

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• Which mechanism leads to increased stream flooding in mountainous regions following extensive deforestation?