1. The Bio-Protection Research Centre; Lincoln University; Canterbury New Zealand
2. Institute of Botany, Department of Invasion Ecology; Academy of Sciences of the Czech Republic; Průhonice Czech Republic
3. Department of Ecology, Faculty of Science; Charles University in Prague; Prague Czech Republic
4. Centre for Invasion Biology, Department of Botany and Zoology; Stellenbosch University; Matieland 7602 South Africa
5. CABI; Delémont Switzerland
6. Estación Biológica de Doñana (EBD-CSIC); Sevilla Spain