Which outcome related to habitat vulnerability increases when a barrier island's dune erosion exceeds accretion?

💡 Explanation

Increased dune erosion beyond accretion causes salinity intrusion, a significant risk, because reduced dune volume diminishes its ability to buffer saltwater encroachment; therefore, aquifers become saline rather than remaining fresh, because barrier function declines protecting terrestrial systems.

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• Which mechanism causes uplift and terracing within strike-slip fault zones during compressional stress?
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• Which effect results when acid rock drainage reduces amphibian activity in wetlands?