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Citation: Sandvik, H. (2013) Ecological impact assessment of alien species: generic and quantitative criteria [abstract of a poster presented at the 43rd Annual Meeting of the GfÖ in Potsdam]. Verhandlungen der Gesellschaft für Ökologie, 43, 309. Abstract: The ecological impact assessment scheme that has been developed to classify alien species in Norway is presented. The underlying set of criteria enables a generic and semi-quantitative impact assessment of alien species. The criteria produce a classification of alien species that is testable, transparent and easily adjustable to novel evidence or environmental change. The impact of alien species is expressed along two independent axes, one quantifying invasion potential using three criteria, the other measuring ecological effects on native species and habitat types using six criteria. The set of criteria has been used to classify the 2320 alien species known to occur in Norway according to their ecological impact. Related publications: The set of criteria has now been published in Biodiversity and Conservation.
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