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Which outcome occurs when ocean acidification reduces carbonate ion availability near coral reefs?

A)Reduced calcification from limited aragonite
B)Increased photosynthesis increasing algal blooms
C)Enhanced nitrogen fixation boosting coral growth
D)Elevated respiration rates due to hypoxia

💡 Explanation

When ocean acidification occurs, carbonate ion availability decreases because excess hydrogen ions bind to carbonate, reducing the saturation state of aragonite, hindering calcification. Reduced calcification arises rather than increased photosynthesis, enhanced fixation or elevated respiration, because calcium carbonate formation is affected by carbonate concentration.

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