Article
?
AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button.
Tier 2
?
Original research — experimental, observational, or case-control study. Direct primary evidence.
Environmental Sources
Sign in to save
Response of soil enzyme activities and bacterial communities to the accumulation of microplastics in an acid cropped soil
The Science of The Total Environment2019
795 citations
?
Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count.
Score: 60
?
0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Researchers tested how polyethylene and polyvinyl chloride microplastics at different concentrations affect enzyme activity and bacterial communities in acidic agricultural soil. Both types of microplastics reduced the diversity of soil bacteria while stimulating certain enzymes related to nitrogen and phosphorus cycling. The findings suggest that microplastic accumulation in farmland may alter important soil biological processes, potentially affecting nutrient cycling and the breakdown of pollutants.
The ecological stress of microplastics (MPs) contamination in agroecosystems raise worldwide concerns. However very few studies concentrated on the effects of MPs exposure on soil microbial community. The alterations of enzymatic activities and bacterial communities were assayed by spiking 1% and 5% (w/w) of polyethylene (PE) and polyvinyl chloride (PVC) MPs in an acid soil. The results showed that both PE and PVC addition inhibited fluorescein diacetate hydrolase activity and stimulated urease and acid phosphatase activities, and declined the richness and diversity of the bacterial communities. More severe effects were observed in the PE treated soils compared to the PVC treated soils generally. The relative abundances of families Burkholderiaceae increased significantly (p < .05) after MPs addition, suggesting the bacteria associated with nitrogen fixation stimulated by the MPs input. Meanwhile, significant (p < .05) decline of Sphingomonadaceae and Xanthobacteraceae after addition of 5% PVC and 1% PE MPs, respectively implied that MPs might inhibit the biodegradation of xenobiotics in the soil. Mover, the PICRUSt analysis demonstrated that membrane transporter was a sensitive prediction functional gene of microplastics exposure in the soil. Future studies could be focused on the role of MPs on the regulation of nitrogen cycling and organic compounds degradation in soils.