Table 1.

The result of phylogenetic signal tests (Blomberg’s K and Pagel’s λ) analysis on the effect of H₂ on carbon assimilation.

	K	λ	Labeled OTUs	Unlabeled OTUs	Labeled OTUs (%)
Bicarbonate	0.13	0	81	58	58.3
Bicarbonate + H2	0.26*	0.64	26	61	29.9
Acetate	0.11	0	73	79	48
Acetate + H2	0.25*	0.82	81	17	82.7
Formate	0.16	0	59	6	90.8
Formate + H2	0.25*	0.64	37	129	22.3
Total number of OTUs	–	–	107	203	34.5

*p ≤ 0.05.