Fig. 3.

Wave speed. Speed calculated from DSDT analyses compared to the cubic-based diffusion prediction, $c=\sigma \sqrt{s_{\mathrm{h}}}(\raisebox{1ex}{$1$}\!\left/ \!\raisebox{-1ex}{$2$}\right.-\widehat{p})$, as a function of p̂, for s_h = 0.2 (left) and s_h = 1 (right). As in (2), σ denotes the standard deviation of dispersal distances; s_h denotes the intensity of CI. The green dots were produced with Gaussian dispersal, blue with Laplace and black with Exponential Square root (ExpSqrt).