FIG 2.

Heterotrophic bacterial community structure from the 0.22-to-3-μm (top panel) and >3-μm (bottom panel) size fractions over the duration of the cultivation experiment. The relative abundances of different bacterial classes are based on the total heterotrophic bacterial 16S rRNA sequence abundances after removing Synechococcus sequences for each time point from the size-fractionated samples. Triplicate samples from the 0.22-to-3- μm and >3-μm size fractions were sequenced for the 22nd, 34th, and 71st day of cultivation (shown in red boxes).