[1] Vrije Univ Amsterdam, Inst Environm Studies, Environm Geog Grp, De Boelelaan 1111, NL-1081 HV Amsterdam, Netherlands
[2] Vrije Univ Amsterdam, Athena Inst, De Boelelaan 1085, NL-1081 HV Amsterdam, Netherlands
[3] Univ Hohenheim, Inst Social Sci Agr, Sustainable Use Nat Resources Dept 430C, Schwerzstr 40, D-70599 Stuttgart, Germany
[4] Swiss Fed Inst Forest Snow & Landscape Res, Birmensdorf, Switzerland