Degraded Coral Reef (IMAGE) University of Exeter Caption These are images of degraded coral reefs at Lizard Island, Northern Great Barrier Reef, Australia. The area has been heavily degraded in the last five years by severe coral bleaching and tropical cyclones. Climate change is causing dramatic increases in the frequency and severity of both bleaching and cyclones on coral reefs worldwide. Credit Tim Gordon, University of Exeter Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.