Table 2: Changes in the Puget Sound Botryllus schlosseripopulation genetics between early and late sampling periods (1999-2007 vs. 2013-2018). Dest : Measure of population differentiation;Fst : Coefficient for population structure measuring the ratio of gene flow to genetic drift; Fis : Inbreeding coefficient;Fs’ : genetic drift. * p<0.05; ** p≤0.001. Edmonds and Shelton are included for the total period comparisons.