1. Centre for Ecology & Hydrology Wallingford UK
2. University of Fribourg Fribourg Switzerland
3. Environment Agency Austria Vienna Austria
4. Division of Conservation Biology, Vegetation Ecology and Landscape Ecology University Vienna Vienna Austria
5. Research Institute for Nature and Forest (INBO) Brussels Belgium
6. Department of Zoology University of Cambridge Cambridge UK
7. The Laboratory The Marine Biological Association Plymouth UK
8. University College London London UK
9. Institute of Zoology Zoological Society of London London UK
10. Invasive Species Unit Service Public de Wallonie Wallonia Belgium
11. Natural History Museum London UK
12. Royal Society for the Protection of Birds The Lodge Sandy Bedfordshire UK
13. Scottish Association for Marine Science Scottish Marine Institute Oban UK
14. Centre for Environment, Fisheries and Aquaculture Science Lowestoft UK
15. Centre for Conservation Ecology Bournemouth University Poole UK
16. Department of Plant and Environmental Sciences University of Copenhagen Denmark
17. Pyrenean Institute of Ecology (IPE‐CSIC) Zaragoza Spain
18. ISSG Rome Italy
19. GRECO Institute of Aquatic Ecology University of Girona Girona Spain
20. Institute for Environmental Protection and Research ISPRA, and Chair IUCN SSC Invasive Species Specialist Group Rome Italy
21. Bio-Protection Research Centre Lincoln University Lincoln New Zealand
22. CABI Delémont Switzerland
23. Royal Belgian Institute of Natural Sciences (RBINS) Oostende Belgium
24. Institute for European Environmental Policy London UK
25. Marine Organism Investigations Marina Village, Ballina, Killaloe Co Clare Ireland
26. University of Bern Bern Switzerland
27. Institute of Botany The Czech Academy of Sciences Průhonice Czech Republic
28. Ovidius University of Constanta Constanta Romania
29. Institut National de la Recherche Agronomique Zoologie Forestière, UR 0633 Ardon Orleans Cedex 2 France
30. Institute of Nature Conservation Polish Academy of Sciences Kraków Poland
31. University of Sussex Brighton UK
32. University of Florence Firenze Italy
33. Belgian Biodiversity Platform Louizalaan, Brussels Belgium
34. Institute for Water and Wetland Research Radboud University Nijmegen The Netherlands
35. Naturalis Biodiversity Center Leiden The Netherlands
36. Netherlands Centre of Expertise for Exotic Species (NEC‐E) Nijmegen The Netherlands
37. Estación Biológica de Doñana, (EBD‐CSIC) Seville Spain
38. Helenic Centre for Marine Research Anavyssos Greece