1. Desert Ecology Research Group School of Biological Sciences University of Sydney New South Wales 2006 Australia
2. Global Trophic Cascades Program Department of Forest Ecosystems and Society Oregon State University Corvallis Oregon 97331 USA
3. Centre for Integrative Ecology School of Life and Environmental Sciences Deakin University Burwood Victoria 3125 Australia
4. Department of Biology and Biotechnologies “Charles Darwin” Sapienza University of Rome Rome 00185 Italy
5. Grimsö Wildlife Research Station Swedish University of Agricultural Sciences SE ‐ 73091 Riddarhyttan Sweden
6. School of Environmental and Forest Sciences University of Washington Seattle Washington 98195 USA
7. Grimsö Wildlife Research Station Research Unit of Biodiversity Oviedo University 33600 Mieres Spain
8. School of Forest Resources and Environmental Science Michigan Technological University Houghton Michigan 49931 USA