1. a Institute of Geography, Masaryk University , Kotlářská 2, 611 37, Brno, Czech Republic E-mail:
2. b Research Centre of Agricultural and Forest Environment , Polish Academy of Sciences , Bukowska 19, 60-809, Poznań, Poland
3. c Potsdam Institute for Climate Impact Research , D-14412, Potsdam, Germany
4. d Centro de Ciencias Medioambientales, CSIC , Serrano 115 bis, 28006, Madrid, Spain