聚乙烯微塑料和土壤盐化对的联合毒性通常是对抗性或添加性的
Zheng Fang1, Mark E Hodson1, Chao-Jian Hu2
1Department of Environment and Geography, University of York, York YO10 5NG, United Kingdom.
Journal of hazardous materials
|June 11, 2025
概括
微塑料 (MPs) 和盐 (NaCl) 对的联合作用显示出添加性或对抗性影响. 较小的MP增加了避免,而高度的MP与盐降低了死亡率,改变了生长和繁殖.
科学领域:
- 环境毒理学环境毒理学
- 土壤生态学 土壤生态学
- 生态毒理学 生态毒理学
背景情况:
- 微塑料 (MP) 积累和盐化是陆地生态系统的同时存在的压力因素.
- 对于土壤无脊椎动物 (如虫) 的MPs和盐的联合毒性尚不清楚.
- 对土壤健康至关重要,因此它们是生态系统压力的关键指标.
研究的目的:
- 为了研究化 (NaCl) 和不同大小的聚乙烯MPs (<35,<125,<500微米) 对的联合作用.
- 评估对避行为,死亡率,生长,繁殖,氧化/透应激和肠道微生物组组成的影响.
主要方法:
- 用不同的MPs和NaCl的度和大小进行了地暴露实验.
- 避免行为 (EC50) 的测量,死亡率,生长参数和生产.
- 使用16S rRNA基因测序分析氧化和透应激生物标志物和地肠道微生物组的分析.
主要成果:
- 较小的MPs (<35μm) 诱导了显著的避免,由NaCl协同增强.
- 单独高MP度并没有增加死亡率;与高NaCl结合,死亡率低于单独NaCl.
- 同时暴露于MPs和NaCl改变了生长和生产,而NaCl诱导的压力水平并没有被MPs加剧;这两种压力因素都显著改变了肠道微生物群.
结论:
- 在大多数测量终点上,NaCl和MPs对的联合作用主要是附加性或对抗性的,而不是协同性的.
- 在没有盐的情况下,微塑料对肠道微生物群体的影响更大.
- 了解这些相互作用对于评估土壤环境中同时出现的污染物的生态风险至关重要.
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