1. School
of Biology and Ecology and Climate Change Institute, University of Maine, 137 Sawyer Environmental Research Center, Orono, Maine 04469, United States
2. Senator
George J. Mitchell Center for Environmental and Watershed Research, 5710 Norman Smith Hall, University of Maine, Orono, Maine 04469, United States
3. James Sewall Company, 136 Center Street, Old Town, Maine 04468, United States
4. Department
of Natural Resources and the Environment, University of New Hampshire, Durham, New Hampshire 03824, United States