1Faculty of Applied Ecology, Agricultural Sciences and Biotechnology, Inland Norway University of Applied Sciences, Campus Evenstad, 2480 Koppang, Norway
2Lammi Biological Station, University of Helsinki, Pääjärventie 320, 16900 Lammi, Finland
3Department of Biological and Environmental Science, Konnevesi Research Station, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
4Department of Wildlife, Fish, and Environmental Studies, Swedish University of Agricultural Sciences, Skogsmarksgränd, 90183 Umeå, Sweden
5Institute of Ecology and Evolution, Friedrich Schiller University Jena, Dornburger Str. 159, 07743 Jena, Germany
6Terrestrial Population Dynamics, Natural Resources Institute Finland, Latokartanonkaari 9, 00790 Helsinki, Finland
7Federal Research Centre for Cultivated Plants, Vertebrate Research, Julius Kühn-Institut, Toppheideweg 88, 48161 Münster, Germany
8Department of Biological and Environmental Science, University of Jyväskylä, P.O. Box 35, 40014 Jyväskylä, Finland
9Departamento de Ciencias Agroforestales, Escuela Tecnica Superior de Ingenierıas Agrarias, Universidad de Valladolid, Campus La Yutera, Avenida de Madrid 44, 34004 Palencia, Spain
10Canada Research Chair in Polar and Boreal Ecology and Centre D’Études Nordiques, Department of Biology, Université de Moncton, 18 Avenue Antonine-Maillet, Moncton, NB E1A 3E9 Canada
11Evolutionary Ecology Group, Department of Biology, University of Antwerp, Universiteitslain 1, 2610 Wilrijk, Belgium
12Arctic Centre, University of Lapland, P.O. Box 122, 96101 Rovaniemi, Finland
13International Rice Research Institute, DAPO Box 7777, Metro Manila, Philippines
14Natural Resources Institute, University of Greenwich, Chatham Marine, Kent, ME4 4TB UK