1. New
York Water Science Center, U.S. Geological Survey, 425 Jordan Road, Troy, New York 12180, United States
2. Natural Resources Canada−Canadian Forest Service, 1219 Queen Street E., Sault
Ste. Marie, Ontario P6A
2E5, Canada
3. University of Maine, School of Forest Resources, Deering Hall, Orono, Maine 04469-5722, United States
4. Direction
de la recherche forestière, ministère des Forêt, de la Faune et des Parcs du Québec, Complexe scientifique, 2700 Einstein
Street, Quebec City, Quebec G1P 3W8, Canada
5. Northern
Research Station, Hubbard Brook Experimental Forest, USDA Forest Service, 234 Mirror Lake Road, North Woodstock, New Hampshire 03262, United States
6. Northern
Research Station, USDA Forest Service, 271 Mast Road, Durham, New Hampshire 03824, United States