More than 300 rapid eradication actions have been conducted across the EU, with almost two-thirds proving effective, yet invasive alien species continue to spread, and new introductions are probable, according to a report released by the European Environment Agency (EEA) today.
Invasive alien species—non-native plants, animals, and other organisms introduced outside their natural range causing harm to biodiversity and ecosystems—are present in all EU Member States, as stated in the EEA briefing ‘Recent progress in managing invasive alien species in the EU.’ While the report highlights significant progress in addressing these species, it also emphasizes the remaining challenges.
The report summarizes national reporting for the 2019–2024 period on 87 species designated as invasive alien species of Union concern, requiring coordinated action across Europe.
Invasive species are not evenly distributed, with hotspots in densely populated areas, rivers, and transport hubs like harbors, particularly in southern and western Europe. The most widespread species include:
- Pond slider (Trachemys scripta) in 26 Member States
- Tree-of-heaven (Ailanthus altissima) in 24 Member States
- Himalayan balsam (Impatiens glandulifera) in 23 Member States
- Signal crayfish (Pacifastacus leniusculus) in 22 Member States
- Pumpkinseed (Lepomis gibbosus) in 22 Member States
- Giant hogweed (Heracleum mantegazzianum) in 21 Member States
Rapid action on invasive species is effective. During the reporting period, 23 Member States conducted over 300 rapid eradication actions, with 60% achieving full, partial, or temporary success, an increase from 14 Member States in the previous period. Additionally, over 4,200 long-term management measures were implemented, with more than half successfully reducing harm to biodiversity.
EU Regulation 1143/2014 aims to prevent, minimize, and mitigate the adverse impacts of invasive alien species on biodiversity and ecosystems across the European Union. Member States’ data reveal significant progress in regulation implementation, including early warning, rapid response measures, and pathway action plan obligations.
Despite these achievements, invasive alien species continue to spread across the EU, and new arrivals are probable. The EEA briefing indicates that increased efforts are necessary, particularly in containing species that are already widespread.
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