Unlike the elephant seal there is no direct evidence for a bottleneck in the species' recent history. However, it is known that the cheetah used to have a much larger geographic range. Athough it is now endemic to the African subcontinent, it used to be found throughout Europe and Asia. Apparently, the species has undergone at least two severe bottlenecks resulting in the loss of much of their genetic variation. The stepping stone model in this program is one in which islands form a ring, and each island receives migrants from adjacent islands only.
Migration homogenizes gene frequencies among populations.
We can't simulate the process of homogenization with this program because we can't start out with different gene frequencies in our replicate populations. Gene flow tends to limit erosion that is caused by genetic drift because it homogenizes the populations that are drifting apart in gene frequency. Let's simulate the process of local adaptation. Start with 8 isolated populations. Change it to source-sink model.