In-Depth Analysis of Soil Microbial Community Succession Model Construction under Microplastics Stress

Area of Science:

• Environmental Science
• Microbiology
• Ecotoxicology

Background:

• Microplastic (MP) toxicity to soil microorganisms is known, but the mechanisms driving microbial community shifts remain unclear.
• Understanding these mechanisms is crucial for assessing the ecological risks of microplastic pollution in terrestrial ecosystems.

Purpose of the Study:

• To investigate how microplastics influence soil microbial community assembly mechanisms.
• To elucidate the role of microplastics in microbial community succession and ecosystem stability.

Main Methods:

• Phylogenetic bin-based null model analysis was used to assess community assembly.
• Network models and protein function prediction were employed to analyze microbial interactions and functions.
• Studies were conducted in five typical soils from Northeast China.

Main Results:

• Microbial communities in high organic matter soils responded more strongly to microplastics.
• Microplastics increased the drift process in community assembly and enhanced network complexity and stability.
• Microplastic presence altered microbial protein functions and regulatory networks, shifting community succession.

Conclusions:

• Microplastics significantly alter soil microbial community structure and function by influencing assembly processes.
• The findings provide a theoretical basis for understanding the ecotoxicological effects of microplastics in soil ecosystems.