Invasive Alien Species - Prioritising prevention efforts through horizon scanning: ENV.B.2/ETU/2014/0016: Final report
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The European Union Regulation (EU) 1143/2014 on invasive alien species (IAS)
establishes an EU-wide framework for action to prevent, minimise and mitigate the
adverse impacts of IAS on biodiversity and centres around the development of a list of
IAS of EU Concern. The initial list of IAS of EU concern will be based on available risk
assessments compliant with agreed minimum standards but horizon scanning is seen
as critical to inform future updating of the list, in order to prioritise the most
threatening new and emerging IAS.
A workshop was held with the overarching aim of reviewing and validating an
approach to horizon scanning to derive a ranked list of IAS which are likely to arrive,
establish, spread and have an impact on biodiversity or related ecosystem services in
the EU over the next decade.
The agreed horizon scanning approach involved two distinct phases:
i) Preliminary consultation between experts within five thematic groups to derive initial
scores;
ii) Consensus-building across expert groups including extensive discussion on species
rankings coupled with review and moderation of scores across groups.
The outcome of the horizon scanning was a list of 95 species, including all taxa
(except microorganisms) within marine, terrestrial and freshwater environments,
considered as very high or high priority for risk assessment
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