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

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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.

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  • Blackburn TM, Cassey P, Duncan RP, Evans KL, Gaston KJ (2004) Avian extinction and mammalian introductions on oceanic islands. Science 305:1955–1958

    Article  CAS  Google Scholar 

  • Boero F, Putti M, Trainito E, Prontera E, Piraino S, Shiganova TA (2009) First records of Mnemiopsis leidyi (Ctenophora) from the Ligurian, Thyrrhenian and Ionian Seas (Western Mediterranean) and first record of Phyllorhiza punctata (Cnidaria) from the Western Mediterranean. Aquat Invasions 4:675–680

    Article  Google Scholar 

  • Butchart SHM, Walpole M, Collen B, van Strien A, Scharlemann JPW et al (2010) Global biodiversity: indicators of recent declines. Science 328:1164–1168

    Article  CAS  Google Scholar 

  • Chiron F, Shirley S, Kark S (2009) Human-related processes drive the richness of exotic birds in Europe. Proc R Soc B 276:47–53

    Article  Google Scholar 

  • Chiron F, Shirley S, Kark S (2010) Behind the iron curtain: socio-economic and political factors shaped exotic bird introductions into Europe. Biol Conserv 143:351–356

    Article  Google Scholar 

  • EC (2008) Towards an EU strategy on invasive species. COM/2008/789. European Commission, Brussels

  • EC (2011) Our life insurance, our natural capital: an EU biodiversity strategy to 2020. COM/2011/244. European Commission, Brussels

  • Galil BS (2009) Taking stock: inventory of alien species in the Mediterranean Sea. Biol Invasions 11:359–372

    Article  Google Scholar 

  • Gaston KJ, Blackburn TM (2000) Pattern and process in macroecology. Blackwell, Oxford

    Book  Google Scholar 

  • Gόmez F (2008) Phytoplankton invasions: comments on the validity of categorizing the non-indigenous dinoflagellates and diatoms in European Seas. Mar Pollut Bull 56:620–628

    Article  Google Scholar 

  • Halpern BS, Walbridge S, Selkoe KA, Kappel CV, Micheli F et al (2008) A global map of human impact on marine ecosystems. Science 319:948–952

    Article  CAS  Google Scholar 

  • Hobbs RJ, Arico S, Aronson J, Baron JS, Bridgewater P et al (2006) Novel ecosystems: theoretical and management aspects of the new ecological world order. Global Ecol Biogeogr 15:1–7

    Article  Google Scholar 

  • Hulme PE, Weser C (2011) Mixed messages from multiple information sources on invasive species: a case of too much of a good thing? Divers Distrib 17:1152–1160

    Article  Google Scholar 

  • Hulme PE, Nentwig W, Pyšek P, Vilà M (2009) Common market, shared problems: time for a coordinated response to biological invasions in Europe? NeoBiota 8:3–19

    Google Scholar 

  • Hulsen T, de Vlieg J, Alkema W (2008) BioVenn—a web application for the comparison and visualization of biological lists using area-proportional Venn diagrams. BMC Genomics 9:488. doi:10.1186/1471-2164-9-488

    Article  Google Scholar 

  • Kettunen M, Genovesi P, Gollasch S, Pagad S, Starfinger U, ten Brink P, Shine C (2009) Technical support to EU strategy on invasive species (IAS)—Assessment of the impacts of IAS in Europe and the EU (final module report for the European Commission). Institute for European Environmental Policy (IEEP), Brussels

  • Lee H II, Reusser DA, Olden JD, Smith SS, Graham J, Burkett V, Dukes JS, Piorkowski RJ, McPhedran J (2008) Integrated monitoring and information systems for managing aquatic invasive species in a changing climate. Conserv Biol 22:575–584

    Article  Google Scholar 

  • Millennium Ecosystem Assessment (MEA) (2005) Ecosystems and human well-being: biodiversity synthesis. World Resources Institute, Washington, DC

    Google Scholar 

  • Pergl J, Nentwig W, Winter M, Bacher S, Essl F, Genovesi P, Hulme PE, Jarošik V, Kühn I, Pyšek P, Roques A, Roy D, Vilà M, Roy H (2012) Progress on DAISIE: alien species inventories in Europe updated. In: Proceedings of the ‘NEOBIOTA 2012’ 7th European Conference on Invasive alien species, 12–14 Sept 2012, Pontevedra, Spain, p 39

  • Pimentel D, Zuniga R, Morrison D (2005) Update on the environmental and economic costs associated with alien-invasive species in the United States. Ecol Econ 52:273–288

    Article  Google Scholar 

  • Preston CD (2009) The terms ‘native’ and ‘alien’—a biogeographical perspective. Prog Hum Geog 33:702–713

    Article  Google Scholar 

  • Pyšek P, Jarošík V, Hulme PE, Kühnd I, Wilda J, Arianoutsou M et al (2010) Disentangling the role of environmental and human pressures on biological invasions. Proc Natl Acad Sci USA 107:12157–12162

    Article  Google Scholar 

  • Shine C, Kettunen M, Genovesi P, Essl F, Gollasch S, Rabitsch W, Scalera R, Starfinger U, ten Brink P (2010) Assessment to support continued development of the EU Strategy to combat invasive alien species. Final Report for the European Commission. Institute for European Environmental Policy (IEEP), Brussels

  • Simpson A, Fournier C, Sellers E, Browne M, Jarnevich C, Graham J, Mehrhoff L, Madsen J, Westbrooks R (2009) Invasive species information networks: collaboration at multiple scales for prevention, early detection, and rapid response to invasive species. Biodiversity 10:5–13

    Article  Google Scholar 

  • Vandekerkhove J, Cardoso AC (2010) Alien species and the water framework directive—questionnaire results. JRC Scientific and Technical Reports, Publications Office of the European Union, EUR 24257 EN, ISBN 978-92-79-15053-1. doi: 10.2788/64083

  • Vilà M, Basnou C, Pyšek P, Josefsson M, Genovesi P, Gollasch S, Nentwig W, Olenin S, Roques A, Roy D, Hulme PE (2010) How well do we understand the impacts of alien species on ecosystem services? A pan-European, cross taxa assessment. Front Ecol Environ 8(3):135–144

    Article  Google Scholar 

  • Zenetos A (2010) Trend in aliens species in the Mediterranean. An answer to Galil, 2009. Taking stock: inventory of alien species in the Mediterranean Sea. Biol Invasions 12:3379–3381

    Article  Google Scholar 

  • Zenetos A, Polychronidis L (2010) Feasibility study in setting up a regional mechanism for collecting, compiling and circulating information on invasive nonindigenous species in the Mediterranean, Contract number No 85/RAC/SPA_2010

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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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Correspondence to Stelios Katsanevakis.

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Gatto, F., Katsanevakis, S., Vandekerkhove, J. et al. Evaluation of Online Information Sources on Alien Species in Europe: The Need of Harmonization and Integration. Environmental Management 51, 1137–1146 (2013).

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