1. Large Lakes Observatory and Biology Department, University of Minnesota Duluth, Duluth, 2205 E 5th St, MN 55812, USA
2. NASA Ames Research Center-Exobiology Branch, Moffett Field, CA 94035, USA
3. Watershed Hydrology and Ecology Research Division, Environment and Climate Change Canada, 867 Lakeshore Rd, Burlington, ON L7S 1A1, Canada
4. University of Maryland Center for Environmental Science Horn Point Laboratory, 5475 Lovers Ln, MD 21613, USA
5. Department of Forest Resources, University of Minnesota, 1530 Cleveland Avenue North, St. Paul, MN 55108, USA
6. U.S. Geological Survey Earth Resources Observation and Science (EROS) Center Integrated Science and Applications Branch 47914 252nd St, Sioux Falls, SD 57198, USA
7. W. K. Kellogg Biological Station, Michigan State University, Hickory Corners, 3700 E Gull Lake Dr, Hickory Corners, MI 49060, USA