1. Faculty of Organic Agricultural Sciences, University of Kassel, 37213 Witzenhausen, Germany.
2. Department of Geosciences and Natural Resource Management, University of Copenhagen, 1958 Frederiksberg C, Denmark.
3. Department of Geography and Geology, University of Turku, 20014 Turku, Finland.
4. Hungarian Department of Biology and Ecology, Babeș-Bolyai University, 400006 Cluj-Napoca str. Clinicilor nr. 5-7, Romania.
5. Ecosystem Services Laboratory–Faculty of Environmental Sciences and Arts, Sapientia Hungarian University of Transylvania, Cluj-Napoca, Calea Turzii nr. 4, Romania.
6. INDEHESA, Forestry School, University of Extremadura, Plasencia 10600, Spain.
7. Department of Agricultural Economics and Rural Development, University of Göttingen, 37073 Göttingen, Germany.