1. Natural Resources Research Institute, University of Minnesota Duluth, Duluth, Minnesota, USA
2. Large Lakes Observatory, University of Minnesota Duluth, Duluth, Minnesota, USA
3. Horn Point Laboratory, University of Maryland Center for Environmental Science, Cambridge, Maryland, USA
4. Earth Resources Observation and Science Center, Integrated Science and Applications Branch, US Geological Survey, Sioux Falls, South Dakota, USA
5. Department of Forest Resources, University of Minnesota, St. Paul, Minnesota, USA