微塑料驱动微生物组合,它们的相互作用,以及在两个具有不同pH值和重金属可用性的土壤中的转基因功能
Jun Meng1, Wenjin Li1, Chengmei Diao1
1Key Laboratory of Recycling and Eco-Treatment of Waste Biomass of Zhejiang Province, School of Environment and Natural Resources, Zhejiang University of Science and Technology, Hangzhou 310023, China.
Journal of hazardous materials
|July 5, 2023
概括
聚乙烯 (PVC) 微塑料 (MPs) 改变土壤微生物群落和功能,特别是在酸性土壤中. PVC MPs增加土壤pH值,减少重金属的可用性,影响细菌和真菌种群和营养循环.
科学领域:
- 环境科学 环境科学
- 土壤微生物学 土壤微生物学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 是陆地生态系统中日益严重的全球环境问题.
- MPs对土壤微生物群落及其转基因组功能的影响尚不清楚.
研究的目的:
- 调查聚乙烯 (PVC) MPs如何影响细菌和真菌群落.
- 评估PVC MPs对不同类型土壤中的土壤基因组功能的影响.
- 评估微生物分类学的组合和相互作用,并在MP压力下发挥作用.
主要方法:
- 用PVC MPs (分别为2.5%和5%) 化酸性 (新东) 和中性 (黄山) 重金属污染的土壤.
- 在60天和120天内分析土壤微生物群落 (细菌和真菌) 和基因组功能.
- 测量土壤pH值和CaCl2可提取的重金属.
主要成果:
- 在酸性土壤中,PVC MP增加了pH值,降低了重金属的可用性.
- PVC MPs降低了细菌α多样性和改变了微生物群体组成 (例如,增加了蛋白质细菌,减少了酸性细菌).
- 碳循环功能被抑制,而营养循环被PVC MPs丰富.
结论:
- 添加PVC微塑料显著改变了土壤微生物社区结构和元基因组功能.
- 在酸性环境中,PVC MPs可以通过增加pH值和减少重金属毒性来改善土壤状况.
- 了解这些影响对于评估土壤中微塑料污染的生态风险至关重要.
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