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← GeographyWhich risk increases for cave ecosystems when nearby agricultural irrigation raises groundwater tables?
A)Increased bacterial nutrient transport into caves✓
B)Decreased rates of speleothem formation
C)Reduced cave air temperature stability
D)Greater reliance on surface water influx
💡 Explanation
Increased bacterial transport rises because groundwater table change causes bacterial mobilization via advection. This contaminates cave ecosystems, therefore bacterial input increases, rather than decreased speleothem formation from stable conditions.
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