Changing Patterns of Ice (IMAGE) U.S. National Science Foundation Caption These are changing patterns of ice formation and melting are affecting winter microbial activity in lakes. Credit John Magnuson/NTL LTER 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.