Figure 2.

Long-time behaviour of the patterns generated from the Turing instability for the go-or-rest model. Spatio-temporal evolution of (a) motile and (b) static populations. The horizontal axis is used for space and the vertical one for time, with a logarithmic time scale that covers several orders of magnitude. Both curves correspond to the long-time evolution of the simulations presented in Figures 1(b) and (c). (a) The dashed lines represent the contour levels ρ₁ = 4 × 10⁻⁵ and indicate brief increases in the number of motile cells released at the edges of the static aggregates. The quasi-horizontal contour levels suggest an almost spatially uniform distribution (i.e. ρ₁(x, t) ≃ ρ₁(t)). (b) The solid lines represent the contour levels ρ₂ = 1 as in Figure 1(c) and show the slow shrinkage of the static aggregates.