Elevational limits
Along the two trails leading from the Rallarvägen into the mountains, we found a significant negative association between total ruderal species richness and elevation. A similar negative, but less pronounced, relationship was found for non-native ruderals (Fig. 6, supplementary
Tables 10-11). There were no significant differences in these relationships between mountain trails for both total ruderals and non-native ruderals.
For total ruderal species, the elevational maximum showed an unexpected positive association with the first year of observation in the whole region for the Björkliden trail, yet not so for the Låktatjåkka trail (Fig. 7, supplementary Tables 12-14). For non-native ruderals as well, a marginally significant positive association was found between the elevational maximum and the first year of observation to the whole region, for both trails (Fig. 7, supplementary Table 15). There was no additional variation explained by EIV-T for both total ruderals and non-native ruderals.