Table 1.

Characteristics of bacterial strains used in this study cultured in LB/5 media at 24°C^a

Strain	Metabolic description	Fermentation	μmax (h−1)	Kb (CFU ml−1)	DP	QO2(max)b (μmol O2 CFU−1 day−1)	OUR(max) (μmol O2 ml−1 day−1)	QO2(min)b (μmol O2 CFU−1 day−1)	OUR(min) (μmol O2 ml−1 day−1)
Escherichia coli K-12	Facultative anaerobe	Mixed acid	0.42 ± 0.02	8.8 ± 0.2	44	−6.7 ± 0.2	10	−9.6 ± 0.7	0.09
Shewanella oneidensis MR-1	Facultative anaerobe	Nonfermenting	0.35 ± 0.06	8.5 ± 0.2	4	−6.5 ± 1.8	25	−7.9 ± 1.0	0.07
Marinobacter aquaeolei VT8	Facultative mixotrophic iron oxidizer	Mixed acid	0.30 ± 0.08	8.9 ± 0.5	17	−6.3 ± 1.2	2.2	−8.9 ± 0.5	0.06

^aμ_max is the maximum growth rate observed during the initial growth phase. K is the maximum population size. DP is the approximate day of the onset of death phase. Q_O2(max) and Q_O2(min) refer to maximum and minimum oxygen consumption rates per CFU measured. OUR(max) and OUR(min) refer to the maximum and minimum levels of oxygen consumption per volume. μ_max, K, and Q_O2 and their associated 90% confidence intervals are derived from Fig. 1 regressions. OUR values are from direct measurements.

^bValues are reported as log₁₀.