1. Institute for Biodiversity and Ecosystem Dynamics University of Amsterdam Amsterdam The Netherlands
2. Department of Earth and Environmental Sciences Michael Smith BuildingThe University of Manchester Manchester UK
3. School of Biological Sciences University of Aberdeen Aberdeen UK
4. Laboratoire Ampère École Centrale de LyonUniversité de Lyon Ecully France
5. Department of Ecology University of Innsbruck Innsbruck Austria
6. Rhizosphere Processes Group Swiss Federal Research Institute WSL Birmensdorf Switzerland
7. UK Centre for Ecology and Hydrology Lancaster UK
8. Department of Microbiology and Ecosystem Science Center of Microbiology and Environmental Systems Science University of Vienna Vienna Austria