Table 4.

OS-type sequences from previous studies (Ward et al., 1990, 1992; Weller et al., 1992; Ferris et al., 1996b, 1997; Ferris and Ward, 1997) and the corresponding sequences obtained in this study.

OS type	Acc. Nos.	Phylum	Identity	OTU	Metagenome sequences [JGI24185J35167_]
A	X52544	Cyanobacteria	Synechococcus sp. A	OTU-22	10825551 (280 bp) 10154254 (272 bp) 10858251 (546 bp)
B	M62776 X52545	Cyanobacteria	Synechococcus sp. B'	OTU-5	12370211 (272 bp)
C	X52546 U42421 U90433	Chloroflexi	Roseiflexus sp. RS-1	OTU-1	10166812 (1357 bp)
D	X52547	Acidobacteria	Chloracidobacterium thermophilum	OTU-17	10032584 (1383 bp)
E	X52548 U42419 U42420	Chlorobi	Ca. Thermochlorobacter aerophilum	OTU-38	10007615 (1379 bp)
F	X52549	Chlorobi	OPB56-like Chlorobi	OTU-262	No scaffold
G	X52550	Betaproteobacteria	Hydrogenophilus sp.	OTU-101	No scaffold
H	X52551	Sprichoaetes	Spirochaeta sp.	OTU-41	No scaffold
I	L04709	Cyanobacteria	Leptolyngbya sp.	no OTU	No scaffold
J	L04710	Cyanobacteria	Synechococcus sp.	no OTU	1045912 (920 bp)
K	L04711	Acidobacteria	Thermoanaerobaculum sp.	OTU-61	10096124 (954 bp) 10037885 (587 bp)
L	L04707	Armatimonadetes	Uncultured Armatimonadetes (OP10)	OTU-3	11621781 (295 bp) 10622461 (710 bp) 12054061 (298 bp)
M	L04708	Chlorobi	Unidentified Ignavibacteriaceae	OTU-34	1068906 (652 bp) 1010292 (1038 bp)
N	L05931 L05930	Betaproteobacteria	Tepidimonas sp.	No OTU	No scaffold
O	L04706	Alphaproteobacteria	Elioraea sp.	OTU-46	10309321 (1157 bp) 10459122 (309 bp)
Q	U42422	Chloroflexi	Candidatus Chlorothrix halophila	No OTU	No scaffold
R	U46750	Betaproteobacteria	Uncultured Beta-Proteobacterium	OTU-172	No scaffold