fig1

Figure 1. RNPP estimates (proportional change in Chlorophyll a concentrations divided by the number of copepod consumers) for control and plastic (microfibers, 70 mm plastic spheres, and 550 mm plastic spheres) exposure trials. Letters above the standard error bars indicate significant differences in RNPP based on Tukey’s HSD pairwise post hoc analyses. RNPP: Relative net primary productivity; PS: polyspheres.