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  • Response of Spatial Patterns of Denitrifying Bacteria Communities to Water Properties in the Stream Inlets at Dianchi Lake, China

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    Author(s)
    Yi, Neng
    Gao, Yan
    Zhang, Zhenhua
    Wang, Yan
    Liu, Xinhong
    Zhang, Li
    Yan, Shaohua
    Griffith University Author(s)
    Gao, Yan
    Year published
    2015
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    Abstract
    Streams are an important sink for anthropogenic N owing to their hydrological connections with terrestrial systems, but main factors influencing the community structure and abundance of denitrifiers in stream water remain unclear. To elucidate the potential impact of varying water properties of different streams on denitrifiers, the abundance and community of three denitrifying genes coding for nitrite (nirK, nirS) and nitrous oxide (nosZ) reductase were investigated in 11 streams inlets at the north part of Dianchi Lake. The DGGE results showed the significant pairwise differences in community structure of nirK, nirS, and ...
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    Streams are an important sink for anthropogenic N owing to their hydrological connections with terrestrial systems, but main factors influencing the community structure and abundance of denitrifiers in stream water remain unclear. To elucidate the potential impact of varying water properties of different streams on denitrifiers, the abundance and community of three denitrifying genes coding for nitrite (nirK, nirS) and nitrous oxide (nosZ) reductase were investigated in 11 streams inlets at the north part of Dianchi Lake. The DGGE results showed the significant pairwise differences in community structure of nirK, nirS, and nosZ genes among different streams.The results of redundancy analysis (RDA) confirmed that nitrogen and phosphorus concentrations, pH, and temperature in waters were the main environmental factors leading to a significant alteration in the community structure of denitrifiers among different streams. The denitrifying community size was assessed by quantitative PCR (qPCR) of the nirS, nirK, and nosZ genes. The abundance of nirK, nirS, and nosZ was positively associated with concentrations of total N (TN) and PO4 3− (𝑝 < 0.001). The difference in spatial patterns between nirK and nirS community diversity, in combination with the spatial distribution of the nirS/nirK ratio, indicated the occurrence of habitat selection for these two types of denitrifiers in the different streams. The results indicated that the varying of N species and PO4 3− together with pH and temperature would be the main factors shaping the community structure of denitrifiers.Meanwhile, the levels of N in water, together with PO4 3−, tend to affect the abundance of denitrifiers.
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    Journal Title
    International Journal of Genomics
    Volume
    2015
    DOI
    https://doi.org/10.1155/2015/572121
    Copyright Statement
    © 2015 Neng Yi et al.This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
    Subject
    Environmental Science and Management not elsewhere classified
    Genetics
    Other Medical and Health Sciences
    Publication URI
    http://hdl.handle.net/10072/173852
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    • Journal articles

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