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Some corals like it hot: Heat stress may help coral reefs survive climate change
Date:3/31/2012

A team of international scientists working in the central Pacific have discovered that coral which has survived heat stress in the past is more likely to survive it in the future.

The study, published today in the journal PLoS ONE, paves the way towards an important road map on the impacts of ocean warming, and will help scientists identify the habitats and locations where coral reefs are more likely to adapt to climate change.

"We're starting to identify the types of reef environments where corals are more likely to persist in the future," says study co-author Simon Donner, an assistant professor in UBC's Department of Geography and organizer of the field expedition. "The new data is critical for predicting the future for coral reefs, and for planning how society will cope in that future."

When water temperatures get too hot, the tiny algae that provides coral with its colour and major food source is expelled. This phenomenon, called coral bleaching, can lead to the death of corals.

With sea temperatures in the tropics forecast to rise by 1-3 degrees Celsius by the end of the century, the researchers say coral reefs may be better able to withstand the expected rise in temperature in locations where heat stress is naturally more common. This will benefit the millions of people worldwide who rely on coral reefs for sustenance and livelihoods, they say.

"Until recently, it was widely assumed that coral would bleach and die off worldwide as the oceans warm due to climate change," says lead author Jessica Carilli, a post-doctoral fellow in Australian Nuclear Science and Technology Organisation's (ANSTO) Institute for Environmental Research. "This would have very serious consequences, as loss of live coral already observed in parts of the world directly reduces fish habitats and the shoreline protection reefs provide from storms."

Caralli and Donner conducted the study in May 2010 in the Pacific island
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Contact: Basil Waugh
basil.waugh@ubc.ca
604-822-2048
University of British Columbia
Source:Eurekalert

Page: 1 2

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