The number of papers which a compared the invasive species to a baseline (either a native species or a native population of the invasive species) and the number of papers which b studied one, two-five or more than six invasive species within the same paper. Stacked bars show the years of publication.

  Part of: Mabey AL, Rius M, Smale DA, Catford JA (2023) The use of species traits in invasive seaweed research: a systematic review. NeoBiota 86: 123-149.