Some fish tackle ocean global warming by pretending it's night

[WorldNews]

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By Alister Doyle OSLO (Reuters) - Some fish may cope with the changing chemistry of the oceans linked to global warming by permanently setting their body defenses to night-time levels, the time of day when they find sea water least hospitable, a study said on Monday. Man-made carbon dioxide, released into the air by burning fossil fuels, forms a weak acid when mixed with water that can harm marine life in what is likely to be a worsening effect of global warming this century. Fish adjust their bodies every day because levels of carbon dioxide naturally in the seas peak at night and dip during sunlight hours when algae, seaweed and other plants absorb carbon dioxide to generate energy.

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