1. Department of Natural Resources and the Environment & Center for Environmental Sciences and Engineering, University of Connecticut, Storrs, Connecticut 06269, United States
2. Under Contract to the U.S. Geological Survey, Columbia Environmental Research Center, Columbia, Missouri 65201, United States
3. U.S. Geological Survey, Great Lakes Science Center, Ann Arbor, Michigan 48105, United States
4. U.S. Geological Survey, Fort Collins Science Center, Fort Collins, Colorado 80526, United States
5. U.S. Geological Survey, Wyoming-Montana Water Science Center, Helena, Montana 59601, United States