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首页> 外文期刊>Environmental Science & Technology >Integrating Microbial Community Assembly and Fluid Kinetics to Decouple Nitrogen Dynamics in an Urban Channel Confluence
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Integrating Microbial Community Assembly and Fluid Kinetics to Decouple Nitrogen Dynamics in an Urban Channel Confluence

机译：将微生物群落组装和流体动力学集成到城市渠道汇合中的氮动力学

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摘要

Understanding the characteristics of biogeochemical processes in urban channel confluences is essential for the evaluation and improvement of water environmental capacity. However, influences of biogeochemical processes in confluence were always overlooked or simply parametrized since the transformation processes controlled by microbial community assembly were hard to quantify. To address this knowledge gap, the present study proposed a novel mathematical modeling system, based on microbial community assembly theory and fluid kinetics, to decouple nitrogen dynamics into flow-induced transport and microorganism-induced transformation processes, and quantified their contributions to nitrogen concentrations. Results revealed that variable selection processes (including hydrodynamic conditions) contributed to significant difference in microbial communities among different hydraulic regions. Variation in microbial communities further shifted transformation processes. Rhodobacterales and Sphingomonadales, which were reported to be vital participants in denitrification process, were enriched in flow separation region, and promoted it as a hotspot for nitrogen removal. In the flow separation region, microorganism-induced transformation processes accounted for 56% of total nitrogen removal, which was significantly higher than that in other regions (12% on average; p < 0.01). Results and findings could provide useful information for the improvement of water environmental capacity.
机译：了解城市渠道汇合中生物地球化学过程的特征对水环境能力的评估和改善至关重要。然而，生物地理化学方法在汇合中的影响总是被忽略或简单参数化，因为微生物群组组件控制的转化过程很难量化。为了解决这一知识差距，本研究提出了一种基于微生物群落组装理论和流体动力学的新型数学建模系统，将氮动力学与流动诱导的运输和微生物诱导的转化过程分离，并量化它们对氮浓度的贡献。结果表明，可变选择过程（包括流体动力学条件）有助于不同液压区域之间的微生物群落的显着差异。微生物群落的变异进一步移位转化过程。据报道的乳菌菌和鞘磷脂在流动分离区域中富集，并促进其作为氮去除的热点。在流动分离区域中，微生物诱导的转化过程占总氮去除的56％，其显着高于其他地区（平均12％; P <0.01）。结果和调查结果可以为改善水环境能力提供有用的信息。

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  • 来源
    《Environmental Science & Technology》 |2020年第18期|11237-11248|共12页
  • 作者

    Yi Li; Cizhang Hui; Wenlong Zhang; Chao Wang; Lihua Niu; Huanjun Zhang; Longfei Wang;

  • 作者单位

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R. China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R China;

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R China;

    School of Environmental Science and Engineering Southern University of Science and Technology Shenzhen 518055 P. R China Phone: +86-755-88018007;

    Key Laboratoiy of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R China;

    Key Laboratoiy of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R China;

    Key Laboratoiy of Integrated Regulation and Resource Development on Shallow Lakes of Ministry of Education College of Environment Hohai University Nanjing 210098 P. R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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