1. USDA Forest Service Northern Research Station Hamden CT U.S.A.
2. Department of Environmental Conservation University of Massachusetts Amherst Amherst MA U.S.A.
3. Agriculture and Agri‐Food Canada Ottawa Ontario Canada
4. Department of Geosciences and Natural Resource Management University of Copenhagen Frederiksberg C Denmark
5. Department of Ecology and Evolutionary Biology Yale University New Haven CT U.S.A.
6. USDA Forest Service Northern Research Station Newark DE U.S.A.