1. Department of Biology; Centre of Excellence PLECO (Plant and Vegetation Ecology); Universiteit Antwerpen; Wilrijk Belgium
2. INRA, VetAgro-Sup, UREP; Clermont-Ferrand France
3. Experimental Plant Ecology; Ernst-Moritz-Arndt University Greifswald; Greifswald Germany
4. Disturbance Ecology; Bayreuth Centre of Ecology and Environmental Research (BayCEER); University of Bayreuth; Bayreuth Germany
5. Institute of Plant Sciences; University of Bern; Bern Switzerland
6. School of Agricultural, Forest & Food Sciences; Bern University of Applied Sciences; Zollikofen Switzerland