[1] Univ Lleida, Dept Crop & Forest Sci, Lleida, Spain
[2] Joint Res Unit CTFC AGROTECNIO CERCA, Solsona, Spain
[3] Univ Cambridge, Dept Plant Sci, Cambridge, England
[4] Univ Cambridge, Dept Geog, Cambridge CB2 3EN, England
[5] Univ Stirling, Dept Nat Sci, Stirling, Scotland
[6] Global Change Res Ctr CzechGlobe, Brno, Czech Republic
[7] Palacky Univ, Fac Sci, Dept Ecol & Environm Sci, Olomouc, Czech Republic
[8] Masaryk Univ, Fac Sci, Dept Geog, Brno, Czech Republic
[9] Swiss Fed Res Inst WSL, Birmensdorf, Switzerland