Fig. 2.

Niche differentiation among western diploids (n = 612), eastern diploids (n = 305), tetraploids (n = 499) and hexaploids (n = 1410) of Senecio carniolicus derived from regression analyses of mean Landolt indicator values (Landolt et al., 2010) for temperature (T), continentality (K), light (L), soil moisture (F), soil reaction (R), soil nutrients (N), humus content (H), soil aeration (D) and soil moisture variability (W). Bars show fixed-effects coefficients (±SE) of linear mixed-effects models representing differences in mean indicator values between two groups and point towards the group with the higher value; asterisks indicate significant differences.