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← GeographyWhich outcome occurs in subtropical stream ecosystems during periods of extensive atmospheric subsidence?
A)Nutrient upwelling into the water column
B)Increased streamflow and sediment transport
C)Reduced allochthonous organic matter input✓
D)Enhanced hyporheic zone exchange capacity
💡 Explanation
Reduced allochthonous inputs occur because extensive atmospheric subsidence suppresses precipitation, therefore leaf litter deposition decreases in stream riparian zones, rather than nutrient upwelling, which typically results from upwelling.
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