Population genetics at three spatial scales of a rare sponge living in fragmented habitats

Table 4 The results of the analysis of molecular variance (AMOVA) on Scopalina lophyropoda microsatellites.

Source of variation	d. f.	Sum of squares	Variance components	Percentage of variation	Fixation indices	Pvalue
Among regions	2	46.955	0.1207	7.57	0.076 F_CT	P < 0.001
Among populations within regions	3	19.827	0.0744	4.66	0.050 F_SC	P < 0.001
Within populations	438	613.166	139.992	87.77	0.123 F_ST	P < 0.05
Total	433	679.948	159.499

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