Complex microplastics significantly influence the assembly process of lake bacterial communities,Journal of Hazardous Materials

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Complex microplastics significantly influence the assembly process of lake bacterial communities
Journal of Hazardous Materials ( IF 12.2 ) Pub Date : 2024-09-17 , DOI: 10.1016/j.jhazmat.2024.135867
Mingjia Li, Xiaohan Xu, Jianjun Wang, Ligang Deng, Zeqiang Wu, Daojun Yang, Xin Qian, Yifan Fan

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 (R2 = 0.19, P < 0.0001), with turnover increasing as MP complexity increased. Conversely, under warmer season, MP complexity was significantly correlated with turnover and nestedness components. Additionally, the interaction effect of environmental and MP factors affected almost all components of beta diversity, particularly in cold water and sediment, with impacts on nestedness of 0.17 and 0.12, respectively, and should thus not be ignored. Our findings indicate for the first time that complex MPs significantly influence the assembly of bacterial communities in lake systems. The impact varies across seasons and future warming may exacerbate this effect, rendering it more uncertain and complex.

更新日期：2024-09-17

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