Fig. 3. Bacterial growth during 8 h incubations with microphytoplankter Thalassiosira pseudonana and picoeukaryotic phytoplankter Micromonas commoda.

Replicates (n = 4) are plotted individually, and standard errors of the means are indicated. Specific growth rates (μ, in units of h⁻¹) are estimated from the T0 and T8 cell numbers, assuming exponential growth. Pink symbols, Ruegeria pomeroyi DSS-3; blue symbols, Stenotrophomonas sp. SKA14; orange symbols, Polaribacter dokdonensis MED152. Initial phytoplankton exometabolite pools consisted of organic compounds released during 7 d of axenic culture (exponential through early stationary phase).