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.