可生物降解和常规微塑料在河口蓝碳系统中的微妙生物化学后果
1Research Centre for the Oceans and Human Health, City University of Hong Kong Shenzhen Research Institute, Shenzhen 518057, China.
Journal of hazardous materials
|September 2, 2025
概括
蓝碳生态系统中的微塑料会破坏营养循环. 可生物降解的多乳酸 (PLA) 的MP意外增加释放,对沿海环境构成长期风险.
科学领域:
- 环境科学
- 海洋生物学
- 生物地质化学
背景情况:
- 蓝色碳生态系统封存微塑料 (MPs).
- 关于MP生物地化学影响的实地证据有限.
- 河口的红树林是可受塑料污染影响的重要碳汇.
研究的目的:
- 在河口红树林中研究聚烯 (PP) 和聚乳酸 (PLA) MPs 的生态化学作用.
- 评估微生物群落和营养循环对MP暴露的反应.
- 评估传统和可生物降解PM对沿海生态系统的长期影响.
主要方法:
- 红树林沉积物在现场暴露于PP和PLA的MP.
- 微生物群落的基因组分析.
- 碳,和循环的测量.
- 薄膜二维扩散梯度 (2D-DGGT) 分析营养梯度.
主要成果:
- 暴露于PLA暂时扰乱了碳,和循环,增加了沉积物中的有机碳和可用的.
- 由PLA诱导的酸性化调动了,显著增加了不稳定的度.
- 暴露于PP并没有引起类似的功能转变.
- 微生物群体表现出对长期PLA暴露的功能性,但泄漏仍然存在.
结论:
- 微塑料,尤其是可生物降解的PLA,可以微妙地破坏河口生物化学网络.
- 可生物降解的MP存在意想不到的长期泄漏风险.
- 可持续的沿海管理必须考虑传统塑料和可生物降解塑料.
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