a strong trendp ‐value = 0.001
Mantel tests showed a significant correlation between pairwise F ST and coastal water distance for both datasets, indicating a strong trend of isolation‐by‐distance ( p ‐value = 0.001) (Figure 3 ). 3.3 Connectivity and historical relationships TreeMix produced a population graph that supported a major phylogeographic split between the outer coast of Washington and Puget Sound.