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Posted Sat Apr 16 2011: from New Scientist:
Acidic ocean robs coral of vital building material http://apocadocs.com/s.pl?1302962630
CARBON dioxide has pillaged the Great Barrier Reef of a compound that corals and many sea creatures need to grow. The finding, from the first survey of ocean acidification around one of the world's greatest natural landmarks, supports fears that the ecosystem is on its last legs. Bizarrely, the reef doesn't appear to be suffering from the effects of ocean acidification just yet. But that may be because it is balanced on a knife-edge between health and decay. Oceans become acidic when they absorb CO2 from the atmosphere. Once dissolved, the gas reacts with carbonate to form bicarbonate, stripping seawater of the compound that many marine organisms including coral, shrimp and crabs need to build their shells or skeletons.... Studies in the Red Sea have found that some species of coral start to dissolve at a [aragonite] saturation of 2.8. "Almost every bit of water we sampled was below 3.5," says Tilbrook, who presented his findings at Greenhouse 2011 in Cairns this week. Close to the shore, to the south of the reef, the saturation was 3....
[Read more stories about: coral bleaching, ocean acidification, massive die-off]

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'Doc Michael says:
All those corals need to do is find a better contractor.

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