TABLE 3.

Counts for major bacterial groups in fermentor samples estimated by FISHa

ProbebCounts (108 cells ml−1)c
Donor 1Donor 2
Type 1 exptType 2 exptdType 1 expteType 2 exptd
0.5 h0.6%, 6.5, 192 h0.1%, 6.5, 192 h0.5 h0.6%0.1%0.5 h0.6%, 6.5, 192 h0.1%, 6.5, 192 h0.5 h0.6%0.1%
5.5, 144 h6.5, 360 h5.5, 144 h6.5, 360 h5.5, 216 h6.5, 458 h5.5, 216 h6.5 458 h
Eub3385.4514.110.15.0412.826.42.864.552.7319.34.574.8224.334.12.738.50
Bac3030.158.542.810.214.1022.10.38*1.540.4714.80.740.622.5227.60.40*0.36
Erec4821.890.593.731.226.051.421.031.810.351.821.332.028.323.791.107.31
Rrec5840.18ND0.04*0.252.41ND0.49ND0.34ND0.18*0.703.41ND0.32ND
Fprau6450.15ND0.140.221.000.320.10*0.090.030.02ND0.570.820.610.250.02*
Prop8530.200.03*0.100.130.181.300.160.580.390.090.01*0.370.560.630.17ND
Rfla729+Rbro730NDNDND0.19ND0.45NDNDNDNDND0.14*NDNDNDND
Bif164NDND0.20NDNDND0.290.410.430.08*0.14*0.19NDND0.380.15
Enterobact DND0.03*0.03*ND0.01*0.05*ND0.10*NDNDNDNDNDNDND0.02
Lab158NDNDNDNDNDNDNDNDNDNDNDNDNDNDNDND
Ato2910.11NDND0.050.15*0.03*0.05*ND0.12*NDND0.04*NDNDNDND
  • a Sampling 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.

  • b See Table 1.

  • c Values 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.

  • d Time courses shown in Fig. 2 (for 0.6% peptide).

  • e Time course shown in Fig. 1.