Table 1. Summary of quantified proteins for community comparisons at high and low pH.

	Replicate 1	Replicate 2	Replicate 3	Shared
Leptospirillum group II	1050	916	875	946
Leptospirillum group III	201	563	429	310
G-plasma	315	306	266	288
Ferroplasma type II	161	190	190	162
Ferroplasma type I	143	222	145	160
A-plasma	67	64	50	56
E-plasma	57	60	50	45
I-plasma	26	29	21	21
Arman type II	7	15	2	5
Actinobacteria	52	40	37	37
Firmicutes	11	9	8	7
Plasmid	8	5	9	2
Virus	14	6	3	1
Total	2112	2425	2085	2148

For each proteomic replicate, the number of proteins quantified for each taxa is shown. The shared column indicates the number of proteins that were detected in at least two replicates and for which average log₂ ratios were calculated. Uncharacterized archaeal Thermoplasmatales lineage organisms are designated by letter abbreviations (A, E, G and I-plasma). Arman type II is an archaeal lineage distinct from the Thermoplasmatales.