TABLE 3.

Counts for major bacterial groups in fermentor samples estimated by FISH^a

Probeb	Counts (108 cells ml−1)c
	Donor 1								Donor 2
	Type 1 expt			Type 2 exptd					Type 1 expte			Type 2 exptd
	0.5 h	0.6%, 6.5, 192 h	0.1%, 6.5, 192 h	0.5 h	0.6%		0.1%		0.5 h	0.6%, 6.5, 192 h	0.1%, 6.5, 192 h	0.5 h	0.6%		0.1%
					5.5, 144 h	6.5, 360 h	5.5, 144 h	6.5, 360 h					5.5, 216 h	6.5, 458 h	5.5, 216 h	6.5 458 h
Eub338	5.45	14.1	10.1	5.04	12.8	26.4	2.86	4.55	2.73	19.3	4.57	4.82	24.3	34.1	2.73	8.50
Bac303	0.15	8.54	2.81	0.21	4.10	22.1	0.38*	1.54	0.47	14.8	0.74	0.62	2.52	27.6	0.40*	0.36
Erec482	1.89	0.59	3.73	1.22	6.05	1.42	1.03	1.81	0.35	1.82	1.33	2.02	8.32	3.79	1.10	7.31
Rrec584	0.18	ND	0.04*	0.25	2.41	ND	0.49	ND	0.34	ND	0.18*	0.70	3.41	ND	0.32	ND
Fprau645	0.15	ND	0.14	0.22	1.00	0.32	0.10*	0.09	0.03	0.02	ND	0.57	0.82	0.61	0.25	0.02*
Prop853	0.20	0.03*	0.10	0.13	0.18	1.30	0.16	0.58	0.39	0.09	0.01*	0.37	0.56	0.63	0.17	ND
Rfla729+Rbro730	ND	ND	ND	0.19	ND	0.45	ND	ND	ND	ND	ND	0.14*	ND	ND	ND	ND
Bif164	ND	ND	0.20	ND	ND	ND	0.29	0.41	0.43	0.08*	0.14*	0.19	ND	ND	0.38	0.15
Enterobact D	ND	0.03*	0.03*	ND	0.01*	0.05*	ND	0.10*	ND	ND	ND	ND	ND	ND	ND	0.02
Lab158	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND	ND
Ato291	0.11	ND	ND	0.05	0.15*	0.03*	0.05*	ND	0.12*	ND	ND	0.04*	ND	ND	ND	ND

^aSampling points correspond to those for the metabolic data shown for the same experiments in Table 2, with the addition of initial (0.5-h) counts.

^bSee Table 1.

^cValues for each donor indicate the percent peptide concentration, the pH, and the time point. ND, not detected (counts of <10⁶ cells ml⁻¹); *, coefficient of variance >10, <15.

^dTime courses shown in Fig. 2 (for 0.6% peptide).

^eTime course shown in Fig. 1.