Fig. 2.

The clonal expansion strategy of both Ammophila species. Inverse cumulative frequency distribution of the pooled step size data (step size >0.68 cm) obtained for both Ammophila arenaria (1053 steps from eight individual plants) and Ammophila breviligulata (492 steps from four individual plants). The dashed lines represent the best-fitted exponential distribution (Brownian) for A. arenaria (blue) and A. breviligulata (red), respectively. The best fit for the total data set, based on weighted AIC value (see Supplementary Table 1), was a truncated Lévy (blue line) for A. arenaria and a two-mode Composite Brownian (red line) for A. breviligulata. Source data are provided as a Source Data file