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In-Depth Analysis of Soil Microbial Community Succession Model Construction under Microplastics Stress
Summary
This study examined how microplastics affect soil microbial communities in five different soil types in Northeast China, finding that the plastics altered microbial protein function and shifted community structure. Soils with higher organic matter showed stronger microbial responses to microplastic stress, with changes in how microbial communities assemble and regulate themselves. These shifts in soil microorganisms matter because healthy soil microbiomes are essential for growing food and maintaining the ecosystems that support human life.
Although microplastics (MPs) toxicity to soil microorganisms has been preliminarily explored, the underlying reasons affecting the direction of microbial community succession are unclear. This study aimed to investigate the impacts of MPs infer community assembly mechanisms through phylogenetic bin-based null model analysis, network models, and protein function prediction in five typical Northeast China five typical soils. The results show that microbial communities in soils with high organic matter exhibit a stronger response to MPs, with enhanced protein functionality, network regulation, and assembly processes. The presence of MPs increased the drift process in the soil microbial community assembly by 2%, a deterministic process influenced by MPs, and enhanced the complexity and stability of the community assembly. Overall, MPs altered microbial protein function and regulatory networks by affecting diversity and community assembly processes, leading to shifts in microbial community succession. This study provided a theoretical basis for further study of the ecotoxicological effects of MPs in soil.