期刊
JOURNAL OF HAZARDOUS MATERIALS
卷 422, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.jhazmat.2021.126865
关键词
Croplands; Plastic residue; Plastisphere; Bacterial diversity; Metabolic pathways
资金
- National Agro-ecological Environment Protection Project of China, China [2110402]
- Natural Science Foundation of Hunan Province, China [2020JJ5224]
- Scientific Research Fund of Hunan Province, China, Education Department [19B268]
The study analyzed soil and film residue from fifty-five plastic-mulching croplands in subtropical areas of China, revealing significant differences in microbial community abundance and functions between the plastisphere and surrounding soil. The plastisphere was found to have enriched pathways related to human disease and an increase in genes associated with carbon, nitrogen, and phosphorus cycles.
Considering the inhomogeneity of plastisphere and surrounding soil, it is plausible that the microbial community colonizing it also varies, affecting soil services and sustainability. Herein, we analyzed the soil and film residue from fifty-five plastic-mulching croplands in the subtropical areas of China. Based on the outcomes of this analysis, we explored the diversity and functions of the associated bacterial communities. Alpha-diversity and phylogenetic diversity of the plastisphere bacterial community was significantly lower than the surrounding soil. The average net relatedness and net nearest taxa indices of samples were less than zero. Four phyla and twenty genera were enriched in the plastisphere compared to the surrounding soil. Ecological networks of the plastisphere community showed multiple nodes, but fewer interactions, and the members of Bradyrhizobium, Rhodospirillaceae, and Bacillus were indicated as the hub species. Predicted pathways related to human disease, as well as the metabolisms of cofactors, vitamins, amino acids, and xenobiotic biodegradation, were reinforced in the plastisphere, and meanwhile, accompanied by an increase in abundance of genes related to carbon, nitrogen, and phosphorus cycles. These results demonstrated the diversity and functions of the plastisphere microbiome and highlighted the necessity for exploring the ecological and health risks of plastic residue in croplands.
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