fig3
Figure 3. Estimated concentrations of nanoplastic (PSNP/mg DW) in the biofilm samples collected across the 14 stations grouped according to their respective water mass (central, northern and southern). The central water body includes three stations (A5, A7 and S1), the northern water body includes nine stations (A1 to A4, A6, A8, A9, N1 and N2), and the southern water body includes two stations (S2 and S3). The solid black line represents the median concentration, and the black dots represent the mean concentration. The letters a, b, and c indicate significant differences in estimated concentrations of nanoplastics between water masses. PSNP: Polystyrene-like nanoplastics; DW: dry weight.