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Changes in bacterial community structures in soil caused by migration and aging of microplastics

The Science of The Total Environment 2022 46 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 45 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Yuanyuan Zhao, Hui Deng, Huanyu Liu, Qipei Li, Qipei Li, Ying Zhang, Ying Zhang, Qipei Li, Ying Zhang, Qipei Li, Yuanyuan Zhao, Chengjun Ge Yuanyuan Zhao, Ying Zhang, Hui Deng, Hui Deng, Hui Deng, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Yue Lin, Ying Zhang, Ying Zhang, Dan Feng, Ying Zhang, Ying Zhang, Yuanyuan Zhao, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Dan Feng, Hui Deng, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Dan Feng, Dan Feng, Ying Zhang, Ying Zhang, Dan Feng, Ying Zhang, Hui Deng, Yuanyuan Zhao, Yuanyuan Zhao, Chengjun Ge Yuanyuan Zhao, Chengjun Ge Ying Zhang, Ying Zhang, Qipei Li, Jiatong Li, Chengjun Ge Ying Zhang, Chengjun Ge Hui Deng, Hui Deng, Ying Zhang, Dan Feng, Yuanyuan Zhao, Hui Deng, Huamei Yu, Dan Feng, Ying Zhang, Dan Feng, Ying Zhang, Qipei Li, Ying Zhang, Yan Fu, Huamei Yu, Yan Fu, Qipei Li, Ying Zhang, Yuanyuan Zhao, Dan Feng, Ying Zhang, Hui Deng, Dan Feng, Jiatong Li, Huamei Yu, Yuanyuan Zhao, Chengjun Ge Ying Zhang, Huamei Yu, Dan Feng, Huamei Yu, Chengjun Ge Dan Feng, Yuanyuan Zhao, Dan Feng, Dan Feng, Ying Zhang, Ying Zhang, Ying Zhang, Ying Zhang, Yuanyuan Zhao, Yuanyuan Zhao, Chengjun Ge Chengjun Ge Huamei Yu, Jiatong Li, Huamei Yu, Huamei Yu, Huamei Yu, Hui Deng, Ying Zhang, Ying Zhang, Chengjun Ge Huamei Yu, Huamei Yu, Huamei Yu, Huamei Yu, Chengjun Ge Qipei Li, Chengjun Ge Huamei Yu, Chengjun Ge Chengjun Ge Chengjun Ge Huamei Yu, Huamei Yu, Chengjun Ge Huamei Yu, Huamei Yu, Ying Zhang, Qipei Li, Huamei Yu, Huamei Yu, Ying Zhang, Ying Zhang, Ying Zhang, Chengjun Ge Yuanyuan Zhao, Chengjun Ge Chengjun Ge

Summary

A 90-day soil column experiment tracked the downward migration of polystyrene and polypropylene microplastics through soil layers, finding that MPs moved progressively deeper over time while undergoing surface chemical changes including increased hydrophilicity. MP migration significantly altered bacterial diversity patterns in soil layers relative to MP-free controls, with colonized MPs hosting distinct communities from surrounding soil.

Polymers

Microplastics (MPs) are classified as emerging pollutants and greatly threatens soil ecosystems. To determine the impact of microplastic migration on soil bacterial diversity, we conducted a 90-day indoor soil column simulation test. Soil and microplastic (granular polystyrene, polypropylene MPs) samples were collected from different soil layers on days 30, 60, and 90. The downward migration trend of MPs was obvious, and its surface functional groups, hydrophobic properties, and crystallinity changed. Bacterial diversity was significantly higher in the surrounding soil than on microplastic surfaces. Also, the topsoil has more bacterial diversity than the middle soil. A higher number of OTUs were detected on microplastic surfaces for the middle soil than in the topsoil. Proteobacteria abundance on microplastic surfaces in the topsoil gradually increased over the course of the experiment, while an opposite trend was observed for the middle soil. Nevertheless, Proteobacteria abundances in both layers were higher than in the surrounding soils. MPs alters the bacterial community composition of soils and provides unique substrates for colonization. The impacts of MPs on soil bacterial communities were better understood in this study. Our findings highlighted the relevance of MPs in soil ecosystems as well as the potential threats they pose.

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