通过调节浮游生物群落,通过纳米塑料介导破坏淡水碳循环
Peng Wang1, Haochen Yang1, Chengjing Li1
1Institute of International Rivers and Eco-security, Yunnan Key Laboratory of International Rivers and Trans-Boundary Eco-security, Yunnan University, Kunming 650091, PR China; Yunnan International Joint Research Center for Hydro-Ecology Science & Engineering, Yunnan University, Kunming 650091, PR China.
Journal of hazardous materials
|November 27, 2025
概括
聚乙烯纳米塑料 (PS-NP) 通过改变细菌群体和减少CO2释放来破坏水中碳循环. 不同的PS-NP大小独特地影响微生物降解和植物浮游生物光合作用,影响淡水生态系统.
科学领域:
- 环境科学 环境科学
- 生态毒理学 生态毒理学
- 生物地质化学生物地质化学
背景情况:
- 纳米塑料 (NP) 是新兴的全球污染物,已知有毒效应.
- 它们对水生生态系统结构和功能的影响,特别是碳循环,目前尚不清楚.
研究的目的:
- 研究聚乙烯纳米塑料 (PS-NP) 对淡水中等宇宙中浮游生物介导的碳循环的影响.
- 确定不同PS-NP大小如何影响碳分解和释放.
主要方法:
- 暴露在淡水中层宇宙中的PS-NP (80, 200, 500 nm) 的环境相关度 (1 mg/L).
- 分析了动物浮游生物,植物浮游生物,细菌和真菌社区结构的变化.
- 量化溶解和有机碳颗粒物分解率和二氧化碳释放.
主要成果:
- PS-NPs显著改变了动物浮游生物和细菌群落,但对植物浮游生物和真菌产生了轻微影响.
- 通过细菌调制增强溶解有机碳分解.
- 抑制有机碳颗粒物分解,减少了95-114%的二氧化碳排放.
结论:
- 环境相关的PS-NP度干扰淡水碳循环.
- 较小的PS-NP增强了微生物的降解,而较大的PS-NP则促进了植物浮游生物的光合作用.
- 塑料污染严重扰乱了水生生态化学过程.
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