Maine study eyes ocean acidification

AUGUSTA — Maine should increase research and monitoring into how rising acidity levels in oceans could harm the state’s valuable commercial fisheries while taking additional steps to reduce local pollution that can affect water chemistry.

Those are two major recommendations of a state commission charged with assessing the potential effects of ocean acidification on lobster, clams and other shellfish. The Legislature created the commission this year in response to concerns that, as atmospheric carbon dioxide levels have risen, the oceans have become 30 percent more acidic because oceans absorb the gas.

Researchers are concerned that organisms that form shells – everything from Maine’s iconic lobster to shrimp and the tiny plankton that are key links in the food chain – could find it more difficult to produce calcium carbonate for shells in more acidic seawater. They worry that the acidification could intensify as carbon levels rise and the climate warms.

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