1. School of Biological Sciences, University of Aberdeen, Cruickshank Building, St. Machar Drive, Aberdeen AB24 3UU, UK,
2. Potsdam Institute for Climate Impact Research, Telegrafenberg, PO Box 601203 D‐14412 Potsdam Germany,
3. Institute for Environment and Sustainability, Joint Research Centre, TP 262/280 Ispra (VA), I‐21020, Italy,
4. Department of Geography, Université Catholique de Louvain, Place Pasteur, 3 B‐1348 Louvain‐la‐Neuve, Belgium,
5. Plant Production Systems, Wageningen University, PO Box 430, NL‐6700 AK Wageningen, The Netherlands