Table 3.

Analysis of molecular variance within and among clusters identified by STRUCTURE (Cluster 1 subpopulations originating from 1922 and 2006; Cluster 2 subpopulation originating from 1960 to 1985) and within sediment layers (age depths)

Source of variation	Degrees of freedom	Sum of squares	Variance components	Percentage of variation
Among clusters	1	4.269	0.05268 Va	2.13a
Among age depths within clusters	3	5.845	−0.02862 Vb	−1.16
Within age depths	89	218.162	2.45126 Vc	99.03
Total	93	228.277	2.47531

Fixation indices F _SC = −0.01182, F _ST = 0.00972, F _CT = 0.02128.

^a p < .05.