Environmental Management

, Volume 51, Issue 6, pp 1137–1146 | Cite as

Evaluation of Online Information Sources on Alien Species in Europe: The Need of Harmonization and Integration

  • Francesca Gatto
  • Stelios KatsanevakisEmail author
  • Jochen Vandekerkhove
  • Argyro Zenetos
  • Ana Cristina Cardoso


Europe is severely affected by alien invasions, which impact biodiversity, ecosystem services, economy, and human health. A large number of national, regional, and global online databases provide information on the distribution, pathways of introduction, and impacts of alien species. The sufficiency and efficiency of the current online information systems to assist the European policy on alien species was investigated by a comparative analysis of occurrence data across 43 online databases. Large differences among databases were found which are partially explained by variations in their taxonomical, environmental, and geographical scopes but also by the variable efforts for continuous updates and by inconsistencies on the definition of “alien” or “invasive” species. No single database covered all European environments, countries, and taxonomic groups. In many European countries national databases do not exist, which greatly affects the quality of reported information. To be operational and useful to scientists, managers, and policy makers, online information systems need to be regularly updated through continuous monitoring on a country or regional level. We propose the creation of a network of online interoperable web services through which information in distributed resources can be accessed, aggregated and then used for reporting and further analysis at different geographical and political scales, as an efficient approach to increase the accessibility of information. Harmonization, standardization, conformity on international standards for nomenclature, and agreement on common definitions of alien and invasive species are among the necessary prerequisites.


Biological invasions Online databases European policy Interoperable web services Standardization 



We thank three anonymous reviewers for their valuable comments that helped us improve the manuscript. Helen Roy, Wolfgang Rabitsch, and Riccardo Scalera provided useful comments on a near-final version of the manuscript. The views presented in this paper should be taken as the personal perspectives of the authors and cannot be regarded as the official position of the European Commission.


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Copyright information

© Springer Science+Business Media New York 2013

Authors and Affiliations

  • Francesca Gatto
    • 1
  • Stelios Katsanevakis
    • 1
    Email author
  • Jochen Vandekerkhove
    • 1
  • Argyro Zenetos
    • 2
  • Ana Cristina Cardoso
    • 1
  1. 1.Water Resources UnitJoint Research Center, Institute for Environment and Sustainability, European CommissionIspraItaly
  2. 2.Hellenic Centre for Marine ResearchAthensGreece

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