Fig. 4

Body size of six-day-old Daphnia inoculated with microbiota from populations which were exposed for a different length (graph a 7 days; graph b 23 days) to different concentrations of OTC (no OTC, 10 μg L⁻¹, 100 μg L⁻¹ or 1 mg L⁻¹). Letters above the bars indicate differences within an exposure time as determined by a Tukey HSD post hoc test. Different letters are significant at 5%