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U.S. West Coast Oysters Face Threat of Invasive Predator Snails

The U.S. West Coast’s native Olympia oysters face a greater threat from invasive predatory snails as climate change raises the acidity of oceans, research by the University of California, Davis found.

Predatory snails ate 20 percent more young bivalves when both species were raised in ocean conditions forecast for the end of the century, according to a university report published in the journal Proceedings of the Royal Society B. Oysters raised by the researchers under the high carbon dioxide conditions forecast for 2100 stayed smaller, while the snails were not affected and as a result ate more shellfish.