Table 1.

Durations of different experimental phases in the two reactorsa

PhaseDuration (days)Flagellate control
Reactor IReactor II
11–751–145
283–231154–261+
3234–249
4251–261+
  • a During phases 2 and 4 (only reactor I) the bacterial communities were controlled by flagellate grazing. Periods of transient stages were not included in the comparisons of phases with (+) and without (−) flagellate control, which are presented in Results.