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在沉积后重塑塑层:通过影响水产养殖池中的沉积物微生物群落来促进N₂O生产

Jun-Nan Huang¹, Lei Xu¹, Bin Wen²

¹Key Laboratory of Freshwater Aquatic Genetic Resources, Ministry of Agriculture and Rural Affairs, Shanghai Ocean University, Shanghai 201306, China; Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources, Ministry of Education, Shanghai Ocean University, Shanghai 201306, China.

Journal of hazardous materials

|December 22, 2023

概括

水产养殖池中的微塑料 (MP) 形成生物膜,在定居后重塑微生物群落. 这个过程改变了沉积物的功能,增加了特定细菌和基因的N2O产量.

科学领域:

环境科学环境科学
微生物学微生物学
水产养殖科学水产养殖科学

背景情况:

微塑料 (MPs) 可以容纳微生物生物膜,形成一个"塑球".
在水产养殖中,MPs生物膜形成和沉积在沉积微生物群落上的影响尚不清楚.
了解这些相互作用对于评估水生生态系统中的环境风险至关重要.

研究的目的:

研究MPs生物膜在水产养殖池中的现场形成和转化.
为了确定定居的MPs生物膜对沉积微生物群落结构和功能的影响.
确定关键的微生物参与者和参与MP驱动的生物地球化学变化的途径.

主要方法:

在水产养殖池中的MPs生物膜的现场化.
沉积物微观世界与塑球的建立.
超基因组分析以确定微生物群落和功能基因.
测量沉积物的化,脱化和N2O生产率.
结构方程建模用于识别关键细菌种类.

主要成果:

在30天内,MPs生物膜形成在地表水中稳定.
定居的MPs生物膜社区变得更类似于沉积物化社区,而不是表面水.
污染的沉积物显示出改变的微生物群落,由生物膜驱动.
在MP的存在下,观察到沉积物化,脱化和N2O生产率的增加.
确定了与N2O生产相关的关键基因 (nxrB,narH) 和细菌 (Alphaproteobacteria,Rhodobacteraceae).这些基因与N2O生产有关.

结论:

沉积MPs重塑现有的生物膜,改变沉积微生物群落.
通过影响特定的沉积物微生物和功能基因,MPs生物膜促进N2O生产.
这项研究强调了水产养殖环境中微塑料污染对生物地球化学的影响.

关键词:

水产养殖是水产养殖的一种方式.微塑料是一种微塑料.氧化氧化是什么?池沉积物的沉积物

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