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← GeographyWhich risk increases when coastal hydro-engineering prevents upwelling?
A)Increased harmful algal bloom frequency✓
B)Reduced thermocline layer water salinity
C)Decreased deep ocean water pH
D)Elevated methane hydrate formation rates
💡 Explanation
Increased harmful algal bloom frequency occurs because nutrient replenishment from upwelling ceases and stratification increases, strengthening surface blooms; therefore algal blooms occur rather than pH reduction driven by carbon fluxes.
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