Beach at Padang (IMAGE) ARC Centre of Excellence for Coral Reef Studies Caption Tropical marine ecosystems have been found to be most at risk from human impact. Credit Image: Andrew Baird Usage Restrictions For use only with this media release and associated media coverage. 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.