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塑料的长期光降解产生的溶解有机物改变了红树林沉积物中的微生物甲转化

Minmin Wang¹, Leiqian Ma¹, Derong Zhang¹

¹Key Laboratory of Agro-Forestry Environmental Processes and Ecological Regulation of Hainan Province, School of Environmental Science and Engineering, Hainan University, Haikou 570228, China; Key Laboratory of Environmental Toxicology, Hainan University, Ministry of Education, Haikou 570228, China.

Bioresource technology

|May 16, 2025

概括

塑料碎片溶解有机物 (PDOM) 通过改变沉积物特性和细菌群体,减少了红树林沉积物中的甲排放. 这一发现突显了PDOM对红树林碳循环的影响.

科学领域:

环境科学环境科学
微生物学微生物学
生物地质化学生物地质化学

背景情况:

塑料垃圾是一个日益严重的环境问题,导致塑料衍生溶解有机物 (PDOM) 的形成.
在像红树林这样的敏感生态系统中,PDOM可以影响生物地化学过程,包括甲 (CH4) 排放.

研究的目的:

研究两种类型的PDOM对来自红树林沉积物的甲 (CH4) 排放的影响.
阐明PDOM在这些环境中影响CH4生产和消耗的机制.

主要方法:

微宇宙化被用来模拟PDOM对红树林沉积物样本的影响.
对沉积物特性,细菌群体组成和与甲循环相关的功能基因丰度进行了分析.

主要成果:

在30天内,PDOM处理使红树林沉积物中的CH4排放量减少了0.03-0.11 ppm.
减少CH4排放与沉积物特性和细菌群落的变化有关.
在PDOM中,含的红素和蛋白质被确定为影响二氧化碳转化为甲路径的关键分子组成部分.

结论:

PDOM对红树林生态系统中的CH4排放产生重大影响,主要是通过改变沉积物和微生物群落的特性.
细菌发酵和芳香化合物的降解可能是调解PDOM对CH4循环的影响的机制.
这项研究有助于了解塑料污染在沿海环境碳动态中的作用.

关键词:

CH(4) 的排放量.在FT-ICR MS中使用.微生物社区的微生物社区.由塑料制成的溶解有机物质.沉积物沉积物是一种沉积物.

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