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首页> 外文期刊>Environmental Science & Technology >Modeling the Effects of Hydrodynamic Regimes on Microbial Communities within Fluvial Biofilms: Combining Deterministic and Stochastic Processes
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Modeling the Effects of Hydrodynamic Regimes on Microbial Communities within Fluvial Biofilms: Combining Deterministic and Stochastic Processes

机译：模拟流体动力学机制对河流生物膜内微生物群落的影响：确定性和随机过程的结合

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摘要

To fully understand the effects of hydrodynamics on a microbial community, the roles of niche-based and neutral processes must be considered in a mathematical model. To this end, a two-dimensional model combining mechanisms of immigration, dispersal, and niche differentiation was first established to describe the effects of hydrodynamics on bacterial communities within fluvial biofilms. Deterministic factors of the model were identified via the calculation of Spearman's rank correlation coefficients between parameters of hydrodynamics and the bacterial community. It was found that turbulent kinetic energy and turbulent intensity were considered as a set of reasonable predictors of community composition, whereas flow velocity and turbulent intensity can be combined together to predict biofilm bacterial biomass. According to the modeling result, the bacterial community could get its favorable assembly condition with a flow velocity ranging from 0.041 to 0.061 m/s. However, the driving force for biofilm community assembly changed with the local hydrodynamics. Individuals reproduction within the biofilm was the main driving force with flow velocity less than 0.05 m/s, while cell migration played a much more important role with velocity larger than 0.05 m/s. The developed model could be considered as a useful tool for improving the technologies of water environment protection and remediation.
机译：为了充分了解流体动力学对微生物群落的影响，必须在数学模型中考虑基于生态位和中性过程的作用。为此，首先建立了一个包含移民，扩散和生态位分化机制的二维模型，以描述流体动力学对河流生物膜内细菌群落的影响。通过计算流体动力学参数和细菌群落之间的Spearman秩相关系数，确定模型的确定性因素。发现湍流动能和湍流强度被认为是一组合理的群落组成预测因子，而流速和湍流强度可以组合在一起来预测生物膜细菌的生物量。根据建模结果，细菌群落可以得到良好的组装条件，流速范围为0.041至0.061 m / s。但是，生物膜群落组装的驱动力随局部流体动力学而改变。生物膜内的个体繁殖是流速小于0.05 m / s的主要驱动力，而流速大于0.05 m / s的细胞迁移起着更为重要的作用。所开发的模型可以被认为是改进水环境保护和修复技术的有用工具。

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  • 来源
    《Environmental Science & Technology》 |2015年第21期|12869-12878|共10页
  • 作者

    Yi Li; Chao Wang; Wenlong Zhang; Peifang Wang; Lihua Niu; Jun Hou; Jing Wang; Linqiong Wang;

  • 作者单位

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

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

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

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

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

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

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

    Key Laboratory of Integrated Regulation and Resource Development on Shallow Lakes, Ministry of Education, College of Environment, Hohai University, Nanjing, Jiangsu 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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  • 正文语种 eng
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