1 Research Centre Laimburg, Laimburg 6, 39040, Auer/Ora, BZ, Italy. uli.prechsl@googlemail.com.
2 Terra Institute, Säbenertorgasse 2, 39042, Brixen, BZ, Italy. uli.prechsl@googlemail.com.
3 Research Centre Laimburg, Laimburg 6, 39040, Auer/Ora, BZ, Italy.
4 Sustainable Agroecosystems Group, Institute of Agricultural Sciences, Department of Environmental Systems Science, ETH Zürich, Universitätstrasse 2, 8092, Zürich, Switzerland.
5 Department of Terrestrial Ecology, Netherlands Institute of Ecology (NIOO-KNAW), P.O. Box 50, 6700 AB, Wageningen, The Netherlands.