Ponds used in the study (IMAGE) University of Exeter Caption The study examined plankton in freshwater ponds exposed to seven years of experimental warming Credit University of Exeter Usage Restrictions This image may only be used with reports of this research 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.