Table 3.

Metagenome bins recovered based on tetranucleotide frequencies.

Bin*	OTU	Identity	16S rRNA	Contigs	Size [Mb]	Marker genes
1	OTU-01	Roseiflexus sp.	No	18	0.20	None
2	OTU-02	Thermotoga sp.	Yes, scaffold00336	142	1.85	30
3$	OTU-03	Armatimonadetes (OP10)	Yes	81	2.9	32
4	OTU-04	Aquificae / Thermocrinis sp.	Yes, scaffold02657	44	0.22	5
5	OTU-05	Synechococcus sp. B'	No	68	0.43	13
6	OTU-06	“Ca. Roseilinea gracile”	No	188	1.71	25
7	OTU-07	Atribacteria (OP9)	No	136	1.45	26
8	OTU-08	Thermodesulfovibrio sp.	Yes, scaffold00748	119	1.59	17
9	OTU-09	Chloroflexi, Anerolineae	Yes, scaffold00273	220	2.62	26
10	OTU-10	Thermotogae-EM3/OPS-2	Yes, scaffold01962	157	1.38	18
11	OTU-11	Chloroflexus sp. MS-G	No	336	3.1	21
12	OTU-12	Armatimonadetes_Gp6 (OP10)	Yes, scaffold03586	200	1.72	24
13	OTU-13	Aminicenantes (OP8)	No	94	2.54	30
14	OTU-14	Planctomycetes	Yes, scaffold03293	258	1.90	19
15	OTU-15	“Ca. Chloranaerofilum corporosum”	No	299	2.26	19
16	OTU-17	Chloracidobacterium thermophilum	No	220	2.07	21
17	OTU-18	Armatimonadetes_Gp 2	Yes, scaffold00584	207	2.64	31
18	OTU-21	Meiothermus sp.	No	155	1.31	8
19	OTU-24	Chlorobi-lineage 5: OPB56	Yes, scaffold02638	137	1.17	18
20	OTU-36	Acidobacterium, OPB3	Yes, scaffold01343	253	2.60	6
21	OTU-38	“Ca. Thermochlorobacter aerophilum”	No	198	2.09	27
22	OTU-46	Elioraea sp.	No	229	2.02	26
23		Planctomycetes	No	385	3.8	29
24		Ignavibacteriaceae	No	75	2.50	31
25	OTU-31	Chloroflexi, Bellilinea sp.	No	237	2.46	24
26		Unidentified	No	130	1.78	28
27		Unidentified	No	96	0.85	2
28		Unidentified	No	110	0.84	3
29		Unidentified	No	98	0.66	5
30		Unidentified	No	22	0.27	None
31		Unidentified	No	38	0.26	2
32	OTU-26	Thermodesulfobacteria	No	27	0.18	12
33		Unidentified	No	23	0.17	none
34		Unidentified	No	23	0.17	none
35		Unidentified	No	17	0.11	8
36		Unidentified	No	12	0.09	none
37		Chloroflexi, Dehalocoocoides-like	No	8	0.06	none

^*Numbers refer to ESOM bins shown in Figure 4.

^$Bin 3 was obtained from an enrichment culture, not from the undermat metagenome.