Roland Jansson, Umeå University (IMAGE) Umea University Caption Roland Jansson, Associate Professor, Department of Ecology and Environmental Science, Umeå University. Credit Mattias Pettersson Usage Restrictions Mattis Pettersson 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.