Frequency of impact and confidence scores received from vice-county recorders. The number of observations relates to 123 different species reported.
Part of: Dehnen-Schmutz K, Pescott OL, Booy O, Walker KJ (2022) Integrating expert knowledge at regional and national scales improves impact assessments of non-native species. NeoBiota 77: 79-100. https://doi.org/10.3897/neobiota.77.89448