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首页> 美国卫生研究院文献>International Journal of Environmental Research and Public Health >The Influence on Contaminant Bioavailability and Microbial Abundance of Lake Hongze by the South-to-North Water Diversion Project
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The Influence on Contaminant Bioavailability and Microbial Abundance of Lake Hongze by the South-to-North Water Diversion Project

机译：南水北调工程对洪泽湖污染物生物利用度和微生物丰度的影响

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The world famous South-to-North Water Transfer Project was built to alleviate serious water shortages in northern China. Considering that lake Hongze is an important freshwater lake in this region, analyzing the influence of water diversion on typical contaminant bioavailability and microbial abundance could aid in achieving a good overall understanding of hydrodynamic variation. Accordingly, in situ high-resolution measurements of diffusive gradients in thin films (DGT) and next-generation high-throughput sequencing were combined in order to survey Lake Hongze and determine the relationship between environmental factors and microbial communities. The DGT method effectively obtained more than the 85% of bioavailable concentrations of the corresponding contaminants; the results showed that labile P, S, Fe, As, and Hg concentrations were higher in areas influenced by water transfer. Moreover, the relative abundance and alpha diversity of the sampling sites distributed in the water transfer area differed significantly from other sites. The pH, conductivity, and labile Mn, As, and P were shown to be the primary environmental factors affecting the abundance and diversity of microbes. With the exception of bioturbation-affected sites controlled by labile Mn and pH, sites distributed in the water diversion area were most affected by As and conductivity, with little spatial discrepancy. Furthermore, site 2, with higher bioturbation abundance, and site 10, with stronger hydrodynamics, had low alpha diversity compared to the other sites. Consequently, the bioavailability of typical contaminants such as P, S, As, Hg, Fe, Mg, Cd, Pb, and Mn, as well as the diversity and abundance of microbial in the sites influenced by the water diversion, were significantly different to the other sites. Thus, the impacts of the South-to-North Water Transfer Project on participant lakes were non-negligible overall in the investigation.
机译：建立世界闻名的南水北调工程是为了缓解中国北方严重的水资源短缺。考虑到洪泽湖是该地区重要的淡水湖泊，因此分析引水对典型污染物生物利用度和微生物丰度的影响有助于全面了解水动力变化。因此，结合了薄膜扩散梯度的原位高分辨率测量（DGT）和下一代高通量测序，以调查洪泽湖并确定环境因素与微生物群落之间的关系。 DGT方法可有效获得相应污染物的85％以上的生物利用度浓度；结果表明，受水分转移影响的区域中不稳定的P，S，Fe，As和Hg浓度较高。此外，分布在输水区的采样点的相对丰度和α多样性与其他采样点显着不同。 pH，电导率以及不稳定的Mn，As和P被证明是影响微生物丰富度和多样性的主要环境因素。除了受不稳定的Mn和pH控制的受生物扰动影响的部位外，引水区中分布的部位受As和电导率的影响最大，空间差异很小。此外，与其他位点相比，具有更高生物扰动丰度的位点2和具有更强水动力的位点10具有较低的α多样性。因此，典型污染物（例如P，S，As，Hg，Fe，Mg，Cd，Pb和Mn）的生物利用度以及受引水影响的部位中微生物的多样性和丰富度与其他网站。因此，在整个调查中，南水北调工程对参与湖泊的影响是不可忽略的。

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