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在黑龙江河中溶解的有机物质的来源,分布和空间特征

Xinyu Song¹, Yue Zhao², Lina Xie³

¹Tianjin Key Laboratory of Animal and Plant Resistance, College of Life Sciences, Tianjin Normal University, Tianjin, 300387, China; Engineering Research Center of Agricultural Microbiology Technology, Ministry of Education & Heilongjiang Provincial Key Laboratory of Ecological Restoration and Resource Utilization for Cold Region & Key Laboratory of Molecular Biology, College of Heilongjiang Province & School of Life Sciences, Heilongjiang University, Harbin, 150080, China; College of Life Sciences, Northeast Agricultural University, Harbin, 150030, China.

Journal of environmental management

|September 2, 2023

概括

溶解有机物 (DOM) 的降解在黑龙江河流盆地不同. 微生物群落转移,利用不同的DOM分数上游与下游,影响营养循环.

科学领域:

环境科学环境科学
地质化学地质化学
微生物学微生物学

背景情况:

黑龙江河流盆地具有多样化的溶解有机物 (DOM) 来源和组成.
了解跨空间变化的DOM降解机制至关重要,但仍然不清楚.

研究的目的:

为了研究不同黑龙江河流域的DOM降解特征.
分析DOM组成,降解和微生物群落之间的关系.

主要方法:

进行并行因素分析 (PARAFAC) 来描述DOM.
基因测序以分析微生物社区结构.
网络分析以了解DOM的微生物利用情况.

主要成果:

DOM水平在中游水域最高;降解率在中游和下游水域最高.
上游DOM显示氨基酸分数枯竭,中游DOM降解以陆地起源为主,下游酸分数减少.
在上游,中游和下游发现了不同的微生物群落,具有特定的DOM分数利用模式.

结论:

黑龙江河的微生物群落适应利用可用的DOM分数,从上游的氨基酸转移到下游的酸.
像Flavobacterium和Lacibacter这样的关键微生物推动了DOM利用差异.
这些发现阐明了DOM循环,并预测了在空间变化下微生物社区的继承.

关键词:

溶解的有机物质是有机物质.分发方式分发方式分发方式原产地原产地起源空间变化的空间变化.

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