The NEC-E develops scientific methods for risk assessment and management of alien species at local, regional and global level. We carry out risk assessments and advise governments, and water and nature managers on the management of alien species.


Analyses are focused on:

  • The introduction, spread and establishment of alien species
  • The impacts of alien species on biodiversity, the functioning of ecosystems, ecosystem services, economy and public health
  • The cost-effectiveness of measures for the prevention and management of invasive species


Example publications


Matthews, J., et al., 2017. A new approach to horizon-scanning: identifying potentially invasive alien species and their introduction pathways. Management of Biological Invasions 8: 37-52. [PDF]

Matthews, J., et al., 2017. Inconsistencies in risk classification of alien species between neighbouring countries. Ecosphere Ecosphere 8: e01832. [PDF]

Matthews, J., et al., 2015. Horizon scanning and environmental risk analyses of non-native biomass crops in the Netherlands. Reports Environmental Science 506. Radboud University Nijmegen, Institute for Water and Wetland Research, FLORON, Wageningen University and Research Centre. 253 pp. [PDF]

Verbrugge, L.N.H., et al., 2012. Risk classifications of aquatic non-native species: application of contemporary European assessment protocols in different biogeographical settings. Aquatic Invasions 7: 49-58. [PDF]


Contact person


Rob Leuven, Radboud Universiteit