Freshwater bacteria (IMAGE) University of Zurich Caption Microbial diversity in the water of Lake Zurich, Switzerland, analyzed by researchers at the Limnological Station of the University of Zurich. Credit Martina Schalch, University of Zurich Usage Restrictions none License Original 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.