1. Department of Earth & Environment Boston University 685 Commonwealth Avenue Boston Massachusetts 02215USA
2. Department of Ecology & Evolutionary Biology University of Connecticut Storrs ConnecticutUSA
3. Department of Botany and Plant Pathology Oregon State University Corvallis OregonUSA
4. Harvard Forest Harvard University Petersham MassachusettsUSA
5. Massachusetts Department of Conservation and Recreation Division of Water Supply Protection Belchertown MassachusettsUSA
6. Department of Biology Wesleyan University Middletown ConnecticutUSA
7. Environmental Studies Program Tufts University Medford Massachusetts USA