In situ recovery of bivalve shell characteristics after temporary exposure to elevated CO.

Ocean uptake of carbon dioxide (CO) is causing changes in carbonate chemistry that affect calcification in marine organisms. In coastal areas, this CO-enriched seawater mixes with waters affected by seasonal degradation of organic material loaded externally from watersheds or produced as a response to nutrient enrichment. As a result, coastal bivalves often experience strong seasonal changes in carbonate chemistry.