Fig. 2

Alpha diversity analysis of the microbial communities from the seawater (surface and bottom) and net biofilm samples Braided Polyethylene (PE) (Site A), Braided Nylon (Site B) and Thin Nylon (Site C), collected from the in situ experiment at marina of Leixões, Matosinhos from left to right: Number of observed ASVs (Richness) Diversity (Shannon index) and Dominance (Berger Parker index). Seawater was collected at all sampling times: 0220 (fev_2020), 0320 (mar_2020), 0520 (may_2020), 0720 (jul_2020), 1020 (oct_2020) and 0221 (fev_2021), while net samples were collected at all sampling times, except at the beginning (0220).