1. Vegetation & Phytodiversity Analysis; Albrecht-von-Haller Institute of Plant Sciences; University of Göttingen; Untere Karspüle 2; 37073; Göttingen; Germany
2. VINCA - Vienna Institute for Nature Conservation and Analyses; Giessergasse 6/7; 1090; Vienna; Austria
3. Department of Botany and Zoology; Masaryk University; Kotlářská 2; 611 37; Brno; Czech Republic