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.