1. Department of Agricultural Economics and Rural Development, University of Göttingen, Göttingen, Germany
2. Faculty of Organic Agricultural Sciences, University of Kassel, Kassel, Germany
3. Centre for Applied Ecology “Prof. Baeta Neves” (CEABN-InBIO) School of Agriculture, University of Lisbon, Lisboa, Portugal
4. Department for Conservation Biology and Social-Ecological Systems, Helmholtz Centre for Environmental Research – UFZ, Leipzig, Germany