Corals in hot water: Can reef tourism survive a warmer world?

Coral reefs are showing resilience to warmer oceans. But there are limits. Higher temperatures and acidification will degrade them further, robbing millions of people of their livelihoods. 

Jennifer Pollom of Ocean Conservation Foundation and Rainbow Reef Dive Centre examining bleached coral covered with algae, off Key Largo, Florida, on Sept 7. PHOTO: COURTESY OF JENNIFER POLLOM
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In waters around the US state of Florida this summer, scientists and volunteers scrambled to rescue thousands of live coral fragments and store them in nurseries until ocean temperatures cooled.

It was a frantic effort to save what they could as water temperatures reached up to 38 deg C, far beyond what most corals can tolerate.

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