1. Ecosystem Functioning and Services Institute of Ecology, Leuphana University Lüneburg Germany
2. Present address: Department of Botany, University of Santa Catarina (UFSC) Florianópolis Brazil
3. Department of Ecosystem and Conservation Sciences, Franke College of Forestry and Conservation University of Montana Missoula U.S.A.
4. Division of Biological Sciences and Institute on Ecosystems University of Montana Missoula U.S.A.