Table 4.

AMOVAs of Bathymodiolus mussels’ endosymbionts

Source of variation	Marker	d.f.	Sum of squares	Variance components	Percentage of variation
(A)
Among groups (i.e. host species)	16S rRNA	1	0.38	0.00	−1.17
	COI	1	22,674.87	4.34	86.06
	dnaK	1	41,820.56	5.65	90.27
	pgi	1	38,679.04	4.89	81.25
	pykF	1	15,028.33	1.84	62.47
	rpoD	1	25,836.11	2.31	75.03
	soxA	1	25,088.60	2.00	85.89
Among populations within group	16S rRNA	5	13.01	0.00	3.13
	COI	7	1627.89	0.11	2.15
	dnaK	7	1552.40	0.09	1.44
	pgi	7	1532.95	0.10	1.67
	pykF	7	2287.06	0.12	4.22
	rpoD	7	3272.85	0.13	4.30
	soxA	7	2290.84	0.08	3.56
Among symbiont strains within population	16S rRNA	40,875	626.60	0.02	98.05
	COI	19,606	11,646.94	0.59	11.79
	dnaK	22,094	11,474.33	0.52	8.30
	pgi	20,581	21,164.98	1.03	17.08
	pykF	23,856	23,350.91	0.98	33.31
	rpoD	32,402	20,595.15	0.64	20.67
	soxA	35,792	8778.76	0.25	10.56
(B)
Among populations (i.e. vent fields)	16S rRNA	6	12.14	0.00	0.68
	COI	8	1135.98	0.03	7.33
	dnaK	8	1461.87	0.04	10.10
	pgi	8	988.51	0.03	6.21
	pykF	8	1229.89	0.02	4.52
	rpoD	8	2157.00	0.04	9.16
	soxA	8	4994.22	0.13	36.15
Among host individuals within population	16S rRNA	38	52.80	0.00	9.80
	COI	61	2965.76	0.18	40.76
	dnaK	60	2852.45	0.16	37.43
	pgi	63	2242.95	0.13	27.48
	pykF	63	3398.70	0.18	38.11
	rpoD	62	4544.92	0.17	37.75
	soxA	61	3022.24	0.11	30.12
Among symbiont strains within host	16S rRNA	40,847	571.01	0.01	89.52
	COI	19,545	4572.94	0.23	51.91
	dnaK	22,034	4936.40	0.22	52.46
	pgi	20,746	6558.35	0.32	66.31
	pykF	23,793	6400.20	0.27	57.37
	rpoD	32,340	7867.61	0.24	53.09
	soxA	35,731	4392.82	0.12	33.73