CO2 Benefits the “Rats and Cockroaches” of Marine World – Scientific American

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CO2 Benefits the “Rats and Cockroaches” of Marine World

Ocean acidification may be driving a cascade of changes that drains marine biodiversity

By Adam Aton, ClimateWire on July 7, 2017

Beneath the waves, swelling levels of carbon dioxide could be boosting some species to ecological dominance while dooming others.
A study published yesterday in Current Biology suggests ocean acidification is driving a cascading set of behavioral and environmental changes that drains oceans’ biodiversity. Niche species and intermediate predators suffer at the expense of a handful of aggressive species.

Sea-level rise and coral bleaching often dominate discussions about how climate change affects the ocean, but a host of more subtle—and harder to research—trends also play a role in reshaping the world’s marine ecosystems. Among the most pressing questions is how fish react to rising levels of CO2, said Tom Bigford, policy director at the American Fisheries Society.

“The hurdles for behavioral…

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