1. Vegetation Ecology Group, Institute of Natural Resource Sciences (IUNR) , Zurich University of Applied Sciences (ZHAW) , Grüentalstr. 14, 8820 Wädenswil , Switzerland .
2. Plant Ecology, Bayreuth Center for Ecology and Environmental Research (BayCEER) , University of Bayreuth , Universitätsstr. 30, 95447 Bayreuth , Germany .
3. German Centre for Integrated Biodiversity Research (iDiv) Halle-Jena-Leipzig , DeutscherPlatz 5e, 04103 Leipzig , Germany .
4. Institute of Botany aft. A.L. Takhtajyan NAS RA/ Department of Geobotany and Plant Eco-Physiology 0040, Acharyan 1, Yerevan , Armenia .
5. Terrestrial Ecology Research Group, Department for Ecology and Ecosystem Management , Technical University of Munich , Hans-Carl-von-Carlowitz-Platz 2, D-85354 Freising , Germany
6. Department of Agricultural Biotechnology, Faculty of Agricultural and Natural Sciences , Düzce University , 81620 Düzce , Turkey .
7. Department of Plant Biology and Ecology, Faculty of Science and Technology , University of the Basque Country UPV/EHU , P. O. Box 644, 48080 Bilbao , Spain .
8. Botanical Garden Center for Biological Diversity Conservation in Powsin , Polish Academy of Sciences , Prawdziwka St. 2, 02-973 Warsaw , Poland .
9. Department of Plant Ecology and Environmental Conservation, Faculty of Biology , University of Warsaw , Żwirki i Wigury St. 101, 02-089 Warsaw , Poland .
10. M.G. Kholodny Institute of Botany , National Academy of Sciences of Ukraine .
11. MTA-DE Lendület Functional and Restoration Ecology Research Group , Debrecen , Egyetem sqr 1, 4032 Hungary .
12. Ecosystems and Environment Research Programme, Faculty of Biological and Environmental Sciences , University of Helsinki , P. O. Box 65 (Viikinkaari 11), 00014 , Finland .
13. Department of Forestry, Wood and Design Sciences , University of Thessaly , GR-43100 , Karditsa , Greece .