Unexpected Diversity (image) University at Buffalo Caption A tiny crustacean, called Eurycercus, from an Alaskan pond. A study suggests that threatened northern freshwater ecosystems harbor a significant proportion of these creatures' known species diversity. Credit Courtesy of Derek J. Taylor Usage Restrictions None 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.