Fig. 2: Niche conservatism across regions.

Similarity tests were used to test for significant niche conservatism in non-native vascular plants introduced to different regions. In A each horizontal line represents one species and the percentage of regions in which that species showed significant niche conservatism based on null models (n = 1200 iterations). Colors indicate whether species conserved their niche in all (light green), the majority (>50%, but <100%, dark green), half (black), the minority (<50%, but >0% dark blue) or none of the regions in which they have been introduced. B shows the percentage of species that conserved their niche for each non-native region, respectively (Pac = Pacific Islands, Afr = Africa, Aus = Australasia, Eur = Europe, Nam = North America, Sam = South America, Ate = temperate Asia, Atr = tropical Asia). Note that no species showed statistically significant niche switching (Fig. S3). Source data are provided as a Source Data file.