Back from the dead: Some corals regrow after ‘fatal’ warming | Malay Mail

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WASHINGTON, Oct 11 — For the first time ever, scientists have found corals that were thought to have been killed by heat stress have recovered, a glimmer of hope for the world’s climate change-threatened reefs. The chance discovery, made by Diego K. Kersting from the Freie University of Berlin...

In this undated photo released by Science Advances, Polyps of the coral Cladocora caespitosa are seen underwater near the Columbretes Islands in the Mediterranean sea. — Diego K. Kersting/Science Advances/AFP pic

“At some point, we saw living polyps in these colonies, which we thought were completely dead,” Kersting told AFP, adding it was a “big surprise”. A quarter of the coral cover of Spain’s Columbretes Islands was lost to a particularly extreme heat wave in 2003.But the researchers found that in 38 per cent of the impacted colonies, the polyps had devised a survival strategy: Shrinking their dimensions, partly abandoning their original skeleton, and gradually, over a period of several years, growing back and starting a new skeleton.

It also meant that there was a narrow window of opportunity to prevent coral reefs, vital ecosystem engineers that provide shelter for hundreds of species of fish and plants, from going extinct as a result of climate change.

 

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