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← GeographyWhich long-term outcome results when sediment blocks tributary inflow to river-fed lakes?
A)Epilimnion oxygen concentration increases
B)Stratification becomes more pronounced
C)Riverine flooding probability elevates notably
D)Overall lake nutrient level drops sharply✓
💡 Explanation
Nutrient starvation results because blocked inflow reduces nutrient supply – a nutrient cycle interruption mechanism – leading to a lower trophic state; therefore less algae grows, rather than higher concentration/stratification (driven by different mechanisms) or external flood risk.
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