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Corals can survive warmer seas if humans don't meddle

2013-04-06 16:00:00| Climate Ark Climate Change & Global Warming Newsfeed

New Scientist: Coral reefs might be able to take the heat of climate change -- if left well alone. A new study suggests reefs that are spared human interference can survive episodes of severe coral bleaching. When corals are stressed - by a sudden rise in the temperature of seawater or a change in its chemistry, for instance - they can no longer provide nutrients to the photosynthetic algae that live symbiotically within them. As a result the corals lose both the algae and their rich hues, which stem from the...

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Reef-building corals lose out to softer cousins due warming

2013-03-24 19:31:00| Climate Ark Climate Change & Global Warming Newsfeed

Reuters: Climate change is likely to make reef-building stony corals lose out to softer cousins in a damaging shift for many types of fish that use reefs as hideaways and nurseries for their young, a study showed. Soft corals such as mushroom-shaped yellow leather coral, which lack a hard outer skeleton, were far more abundant than hard corals off Iwotorishima, an island off south Japan where volcanic vents make the waters slightly acidic, it said. A build-up of carbon dioxide in the atmosphere is turning...

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How do corals survive in the hottest reefs on the planet?

2013-02-01 11:00:00| LifeSciencesWorld

[NEWS] Contact: Catherine Beswick catherine.beswick@noc.ac.uk National Oceanography Centre, Southampton (UK) Coral reefs are predicted to decline under the pressure of global warming. However, a number of coral species can survive at seawater temperatures even higher than predicted for the tropics during the next century. How they survive, whi…

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Some corals are 'always prepared' to take the heat

2013-01-07 07:00:00| Climate Ark Climate Change & Global Warming Newsfeed

LA Times: As the tide drops, seawater in Ofu Lagoon gets cut off from the ocean swirling around American Samoa. Under the intense South Pacific sun, these shallow waters can reach 93 degrees -- temperatures that typically would make corals overheated, cause them to bleach bone white and die. Yet the corals in these hot waters seem to be thriving. A team of researchers at Stanford University has figured out why: These corals leave a set of 60 genes in the "on' position to help them resist heat shock and...

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