Table 2.

Identification rate of MS/MS spectra for the different samples.

Condition	Combination of strains*	MS/MS submitted	MS/MS Identified (%)
Cn	AXX	185932	24.63
M	LXX	166215	14.14
M	S–AL**	263940	20.61
M	S–LX**	78849	30.16
P	ASX	530117	16.78
P	AXX	152847	14.91
P	LSX	347396	29.66
P	LXX	229079	20.01
P	S–AL**	168878	25.32
P	SXX	161726	24.63
Average			22.09

*The combination of strains were composed of A. caldus (A), L. ferriphilum (L) and S. thermosulfidooxidans (S) and used as pure or mixed cultures, resulting in the following categories: A, L, S, AS, LS, and ASL (X stands for no species). A description corresponding to the conditions is found in the FAIRDOMHub repository (“SysMetEx – Dataset collection”⁵⁵, “Sample Identification Code”).

**The dash sign (“–”) in the combination of strain names indicates sequential inoculation for pre-colonization by the species corresponding to the letter before the dash sign.