1. Department of Environmental Conservation; University of Massachusetts; 160 Holdsworth Way; Amherst; MA; 01003; U.S.A.
2. U.S. Department of Agriculture Forest Service; Northern Research Station; 160 Holdsworth Way; Amherst; MA; 01003; U.S.A.
3. Mesoamerican Development Institute; University of Massachusetts; 1 University Avenue; Lowell; MA; 01854; U.S.A.