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重金属诱导微生物群落组成的变化和与沿海沉积物中溶解的有机物相互作用

Yu Wang¹, Yuxing Hu², Yanting Liu²

¹State Key Laboratory of Marine Environmental Science, College of Ocean and Earth Science, Xiamen University, Xiamen, China; College of Environmental and Ecology, Xiamen University, Xiamen, China.

The Science of the total environment

|April 3, 2024

概括

重金属通过改变溶解有机物 (DOM) 组成来改变沿海沉积物,使其变得更加反复. 微生物群落与污染地区的DOM相互作用不同,影响沉积物功能.

科学领域:

环境科学环境科学
微生物学微生物学
地质化学地质化学

背景情况:

重金属显著影响沿海沉积物的结构和功能.
溶解有机物 (DOM) 影响沉积物中的重金属毒性和微生物群落.
重金属对沿海沉积物中微生物-DOM相互作用的特定影响尚不清楚.

研究的目的:

调查重金属对微生物群落结构 (细菌和古生物) 和Beibu湾沿海沉积物的DOM组成的影响.
阐明重金属如何调解微生物群落和DOM之间的相互作用.

主要方法:

在表面沉积物中分析重金属污染 (Cr, Zn, Cd, Pb).
使用O/C比率和分子指标 (CRAM,HUC) 进行溶解有机物 (DOM) 组成的表征.
评估细菌和考古社区结构和多样性.
同时发生的网络分析,以探索微生物和DOM的关联.

主要成果:

,,,和被确定为污染物.
污染的沉积物显示DOM具有更高的O/C比率和更多的反抗性化合物 (CRAM,HUC).
微生物多样性显示微小的变化,但网络分析显示特定的细菌 (B2M28) 和古生物 (Euryarchaeota) 群体与受污染地区的CRAM有关.
活性细菌与含的DOM相关,而古生物-DOM网络与含和硫的分子相关.

结论:

重金属显著影响沿海沉积物中微生物群落和DOM之间的相互作用.
污染导致更多反抗性DOM化合物的积累.
特定的微生物群体与受到重金属污染影响的DOM组件形成明显的关联.

关键词:

溶解的有机物质是有机物质.重金属污染污染重金属污染微生物社区的微生物社区.有机物质的化学组成有机物质的化学组成沉积物沉积物是一种沉积物.

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