Fig 2. Summary of reviewed spatial models.

(A) Schematic of Fisher’s wave of advance in one dimension [19]. (B) Space-time diagrams under regimes of constant vs. accelerating dispersal [22]. (C) Cartoon representation of parallel adaptation resulting in a tessellation-like pattern of genetic variation (as under the allelic exclusion assumption in [22]), followed by the later fixation of a single allele (as resulting, for instance, from a change in the adaptive landscape favoring a single allele present from standing variation). (D) Space-time diagram under the parallel exclusion assumption [22,23]. (E) Cartoon of the core-halo structure identified by [23] for spatial soft sweeps under long-distance dispersal.