1. Terrestrial Ecology Research Group, Department of Ecology and Ecosystem Management, School of Life Sciences Weihenstephan Technical University of Munich Freising Germany
2. Forest Entomology, Swiss Federal Institute for Forest, Snow and Landscape Research WSL Birmensdorf Switzerland
3. Institute of Terrestrial Ecosystems, Department of Environmental Systems Science Swiss Federal Institute of Technology ETH Zurich Zurich Switzerland
4. Section of Animal Science, Department of Agriculture, Food, Environment and Forestry University of Florence Firenze Italy
5. Ecosystem Dynamics and Forest Management in Mountain Landscapes Research Group, Department of Ecology and Ecosystem Management, School of Life Sciences Weihenstephan Technical University of Munich Freising Germany
6. Forest Protection, Bavarian State Institute of Forestry LWF Freising Freising Germany