1. Ecosystems and Global Change Group, Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, U.K.
2. Department of Forest and Conservation Sciences, University of British Columbia, Vancouver, British Columbia V6T 1Z4, Canada.
3. Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22904, USA.
4. Department of Physical Geography and Ecosystem Science, Lund University, S-223 62 Lund, Sweden.
5. Department of Natural Resource Sciences, McGill University, Sainte Anne de Bellevue, Quebec H9X 3V9, Canada.
6. Département des Sciences Biologiques, Université du Québec à Montréal, Montréal, Quebec H3C 3P8, Canada.
7. Lancaster Environment Centre, Lancaster University, Lancaster LA1 4YQ, U.K.
8. The Wild Trout Trust, PO Box 120, Waterlooville PO8 0WZ, U.K.
9. Vale Living with Lakes Centre, Laurentian University, Sudbury, Ontario P3E 2C6, Canada.
10. Department of Biological Sciences, University of Notre Dame, Notre Dame, IN 46556, USA.
11. Climate Impacts Research Centre, Department of Ecology and Environmental Science, Umeå University, 90187 Umeå, Sweden.
12. Cary Institute of Ecosystem Studies, Millbrook, NY 12545, USA.