Regulatory path for soil microbial communities depends on the type and dose of microplastics

Qi，Ruimin1,2; Jones，Davey L.3,4; Tang，Yuanyuan1; Gao，Fengxiang5; Li，Jiawei1; Chi，Yihan1; Yan，Changrong2,6

2024-07-15

10.1016/j.jhazmat.2024.134702

Journal of Hazardous Materials   影响因子和分区

0304-3894

1873-3336

To reveal the feedbacks and regulating mechanisms of microplastic types and doses on microbial community, a microcosm experiment was carried out with two non-degradable microplastics [polyethylene (PE) and polyvinyl chloride (PVC)] and four biodegradable microplastics [poly(butylene succinate) (PBS), polyhydroxyalkanoates (PHA), poly(butyleneadipate-co-terephthalate) (PBAT), and polypropylene carbonate (PPC)] at different levels (1 %, 7 %, and 28 %). As a result, the content of total carbon (TC), soil organic carbon (SOC), and microbial biomass carbon (MBC) (expect MBC in PBS soil) increased with increasing doses of microplastics, and increased at the lowest PE dose rate. Biodegradable microplastics created a more active ecological niche while enriching more pathogens than non-degradable microplastics. Structural equation modeling indicated that microbial diversities were in a type-dependent assembly, whereas microbial compositions were more profoundly affected by the microplastic doses, ultimately. The standardized total effect coefficient of microplastic types on bacterial and fungal diversities was − 0.429 and − 0.282, and that of doses on bacterial and fungal compositions was 0.487 and 0.336, respectively. Both microplastic types and doses significantly impacted pH, electrical conductivity, total nitrogen, TC, SOC, and MBC, subsequently inhibiting microbial diversities and stimulating microbial compositions with particular pathways. The results provide a comprehensive understanding for evaluating the potential risk of microplastics.

Ecological function Microbial community Microplastic Regulatory mechanism Structural equation modeling

SCI ; EI

英语

第一 ; 通讯

20242116138267

Chlorine compounds ; Ecology ; Microorganisms ; Microplastic ; Polypropylenes ; Polyvinyl chlorides ; Soils

Water Pollution:453 ; Environmental Impact and Protection:454.2 ; Ecology and Ecosystems:454.3 ; Biology:461.9 ; Soils and Soil Mechanics:483.1 ; Organic Compounds:804.1 ; Organic Polymers:815.1.1

ENGINEERING

2-s2.0-85193828556

Scopus

1.Guangdong Provincial Key Laboratory of Soil and Groundwater Pollution Control,School of Environmental Science and Engineering,College of Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.Key Laboratory of Prevention and Control of Residual Pollution in Agricultural Film,Ministry of Agriculture and Rural Affairs,Beijing,100081,China
3.School of Environmental and Natural Sciences,Bangor University,Bangor,Gwynedd,LL57 2UW,United Kingdom
4.SoilsWest,Food Futures Institute,Murdoch University,Murdoch,6150,Australia
5.Key Laboratory of Polymer Ecomaterials,Changchun Institute of Applied Chemistry CAS,Chinese Academy of Sciences,Changchun,130022,China
6.Institute of Environment and Sustainable Development in Agriculture,Chinese Academy of Agricultural Sciences,Beijing,100081,China

Qi，Ruimin,Jones，Davey L.,Tang，Yuanyuan,et al. Regulatory path for soil microbial communities depends on the type and dose of microplastics[J]. Journal of Hazardous Materials,2024,473.

Qi，Ruimin.,Jones，Davey L..,Tang，Yuanyuan.,Gao，Fengxiang.,Li，Jiawei.,...&Yan，Changrong.(2024).Regulatory path for soil microbial communities depends on the type and dose of microplastics.Journal of Hazardous Materials,473.

Qi，Ruimin,et al."Regulatory path for soil microbial communities depends on the type and dose of microplastics".Journal of Hazardous Materials 473(2024).