1. Department of Invasion Ecology, Institute of Botany, The Czech Academy of Sciences, CZ-252 43, Průhonice, Czech Republic
2. School of Biological Sciences, University of East Anglia, Norwich NR4 7TJ, Norfolk, UK
3. Department of Biodiversity Research, Global Change Research Centre, The Czech Academy of Sciences, Bělidla 4a, CZ-602 00, Brno, Czech Republic
4. Institute for Environmental Studies, Charles University in Prague, Benátská 2, CZ-128 01, Prague, Czech Republic
5. Department of Ecology, Faculty of Science, Charles University in Prague, Viničná 7, CZ-128 44, Prague, Czech Republic