Complex microplastics significantly influence the assembly process of lake bacterial communities

Environmental microplastics (MPs) vary in abundance, shape, size, color, and polymer type in freshwater ecosystems, yet their impact on bacterial community assembly in natural lakes is unclear. Here, we examined MPs and bacterial compositions in water and sediments of Taihu Lake, China, to reveal the influence of complex MPs on the bacterial community assembly. The results showed that the complexity index of MPs significantly influenced the turnover and nestedness components of bacterial communities. In the colder season, MP complexity was significantly correlated with the turnover componentin sediments (R