Figure 4.

Differences between the control and GX-enriched microcosm experiments comparing: changes in heterotrophic bacterial biomass (ΔHBB = T₂-T₀) (A), growth rates (B) and TEP concentrations (ΔTEP = T₂-T₀) (C) as well as β-glucosidase activity (β-glu) (D), bacterial carbon demand (BCD) (E), and bacterial growth efficiency (BGE) (F). Each box plot represents microcosms that were incubated with water samples from the surface and bottom of stations E1–E3. Box plot boundary are the 25th–75th percentile while the inner line represent median and whiskers highlight the 10th–90th percentile. Significant differences between control and GX enriched microcosms are marked with an asterisk (P < 0.01).