1. ECOBIO – UMR 6553, Univ Rennes, Rennes, France
2. CREM – UMR 6211, Univ Rennes, Rennes, France
3. Center of Biodiversity and Sustainable Land Use, University of Goettingen, Goettingen, Germany
4. Department of Agricultural Economics and Rural Development, University of Goettingen, Goettingen, Germany
5. Agrocampus Ouest, SAS – UMR 1069, Rennes, France