Building on my dissertation research, I have been using coalescent models to test hypotheses about genetic structure in over 40 different species sampled by the ToBo lab from throughout the Hawaiian archipelago. For each species I am evaluating whether the genetic data are best explained by:
- a stepping-stone model (gene flow only between neighboring islands)
- an island model (gene flow from each population to each other population; all populations are the same size)
- regional structure due to currents bisecting the Hawaiian archipelago just north of the main Hawaiian Islands, north of French Frigate Shoals, and north of Lisianski Atoll.
- panmixia (effectively random mating among all populations)