Ruderal richness and abundance with distance to introductory points and temperature
The number of total ruderal species and non-native ruderal species declined with distance to the railroad in all but the warmest parts of the gradient, where these numbers increased slightly with distance to the railroad (Fig. 4, supplementary Tables 7-8). No additional variation was explained by distance to the E10, the mean soil temperature of the coldest quarter, or mean annual soil temperature.