Dynamics and functions of microbial communities in the plastisphere in temperate coastal environments

•Microplastic (MP)-associated bacterial and fungal communities were uncovered.•The differentiation of microbial taxa depending on coastal systems was explored.•Degradation of MPs can influence on microbial colonization and biofilm formation.•Microbial functions can alter the properties of MPs in the coastal environment.•Enrichment of specific taxa on MPs may influence their impact on the ecosystem. Microbial attachment and biofilm formation on microplastics (MPs