1. Community Ecology Research Unit Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland
2. Forest Resources and Management Research Unit Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland
3. Cantonal Museum of Zoology Lausanne Switzerland
4. Department of Ecology and Evolution University of Lausanne Lausanne Switzerland
5. Terrestrial Ecology Unit, Department of Biology Ghent University Ghent Belgium
6. Forest Health and Biotic Interactions Research Unit Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland