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溶解有机物化学多样性的时空空间变化及其与重金属污染河流微生物组成的相互作用

Chun Liu¹, Rujie Li², Yuheng Zhang²

¹Department of Ecology, Jinan University, Guangzhou 510632, Guangdong, China; Engineering Research Center for Tropical and Subtropical Aquatic Ecological Engineering, Ministry of Education, Guangzhou 510632, China.

|October 9, 2025

概括

河流溶解有机物 (DOM) 组成和微生物群落在受污染的河流中因季节而异. 菌群体对DOM变化做出了更强烈的反应,影响了流域碳循环.

科学领域:

环境化学环境化学
微生物学微生物学
生物地质化学生物地质化学

背景情况:

河流溶解有机物 (DOM) 对于碳循环至关重要,但其多样性和污染的流域中的微生物相互作用尚不清楚.
重金属污染对水生生态系统构成重大风险,影响DOM特征和微生物群落.

研究的目的:

研究河流DOM化学成分的时空变化及其与重金属污染河流中的微生物群落的相互作用.
了解环境因素和人类活动对DOM化学多样性和微生物结构的影响.

主要方法:

集成光学光谱学,超高分辨率质谱学 (FT-ICR MS) 和高通量测序.
分析了DOM分子组成和微生物社区结构的季节和空间变化.
利用冗余分析 (RDA) 和地幔测试来评估DOM,微生物和环境因素之间的关系.

主要成果:

河流DOM主要是类似蛋白质的,含和CHONS化合物的季节性变化表明了人类的影响.
观察到DOM分子组成和微生物社区结构的显著时空变化,特别是在采矿区附近.
DOM和微生物群落的季节性变化比空间差异更明显.
DOM的组成,特别是类似和类似蛋白质的成分,与微生物社区结构有显著的相关性.
菌群体与DOM组成的相关性比细菌群体更强.

结论:

在重金属污染的河流中,DOM化学多样性和微生物群落表现出显著的时空动态.
环境因素和人类活动强烈影响河流DOM组成和微生物结构.
真菌群体对DOM变化具有高度反应性,突出显示了它们在受污染物影响的水生生态系统中的作用.
结果提供了关于碳循环机制和压力流域的管理策略的见解.

关键词:

溶解的有机物质是有机物质.在FT-ICR MS中使用.被重金属污染的河流被污染了.微生物社区的微生物社区.分子组成分子构成

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