1. Institute of Landscape Ecology and Resources Management; University Giessen; Giessen Germany
2. German Federal Environment Agency (UBA); Dessau Germany
3. Institute of Agroecology, RLP Agroscience, Neustadt an der Weinstraße; Germany
4. Fraunhofer Institute of Molecular Biology and Applied Ecology; Schmallenberg and Aachen Germany
5. Footways SAS; Orléans France