1. Fondation J.-M. Aubert, Champex-Lac, Switzerland; Department of Botany and Plant Biology, Section of Biology, University of Geneva, Chambésy, Switzerland
2. Department of Botany and Biodiversity Research, University of Vienna, Vienna, Austria
3. Institute of Environmental Sciences, University of Castilla-La Mancha, Toledo, Spain
4. Münster, Germany
5. Research Center of the Slovenian Academy of Sciences and Arts, Ljubljana, Slovenia; University of Nova Gorica, Nova Gorica, Slovenia; Academy of Sciences and Arts of the Republic of North Macedonia, Skopje, North Macedonia
6. Department of Agricultural, Food and Environmental Science, University of Perugia, Perugia, Italy
7. Iluka Chair in Vegetation Science and Biogeography, Harry Butler Institute, Murdoch University, Perth, WA, Australia; 11Department of Geography and Environmental Studies, Stellenbosch University, Matieland, Stellenbosch, South Africa