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首页> 外文期刊>The Science of the Total Environment >Organic matter quality structures benthic fatty acid patterns and the abundance of fungi and bacteria in temperate lakes
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Organic matter quality structures benthic fatty acid patterns and the abundance of fungi and bacteria in temperate lakes

机译：温带湖泊中有机质的质量构成底层脂肪酸的分布以及真菌和细菌的丰度

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摘要

Benthic microbial communities (BMCs) play important roles in the carbon cycle of lakes, and benthic littoral zones in particular have been previously highlighted as biogeochemical hotspots. Dissolved organic matter (DOM) presents the major carbon pool in lakes, and although the effect of DOM composition on the pelagic microbial community composition is widely accepted, little is known about its effect on BMCs, particularly aquatic fungi. Therefore, we investigated the composition of benthic littoral microbial communities in twenty highly diverse lakes in northeast Germany. DOM quality was analyzed via size exclusion chromatography (SEC), fluorescence parallel factor analyses (PRAFACs) and UV-Vis spectroscopy. We determined the BMC composition and biomass using phospholipid-derived fatty acids (PLFA) and extended the interpretation to the analysis of fungi by applying a Bayesian mixed model. We present evidence that the quality of DOM structures the BMCs, which are dominated by heterotrophic bacteria and show low fungal biomass. The fungal biomass increases when the DOM pool is processed by microorganisms of allochthonous origin, whereas the opposite is true for bacteria.
机译：底栖微生物群落（BMCs）在湖泊的碳循环中起着重要的作用，尤其是底栖的沿海地带以前已被强调为生物地球化学的热点。溶解性有机物（DOM）是湖泊中的主要碳库，尽管DOM组成对中上层微生物群落组成的影响已被广泛接受，但对其对BMC（尤其是水生真菌）的影响知之甚少。因此，我们调查了德国东北部20个高度多样化的湖泊中底栖沿海微生物群落的组成。通过尺寸排阻色谱（SEC），荧光平行因子分析（PRAFAC）和UV-Vis光谱分析DOM质量。我们使用磷脂衍生的脂肪酸（PLFA）确定了BMC组成和生物量，并通过应用贝叶斯混合模型将解释扩展到真菌的分析。我们目前的证据表明，DOM结构BMCs的质量由异养细菌占主导，并显示出较低的真菌生物量。当DOM库被异源微生物处理时，真菌生物量增加，而细菌则相反。

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  • 来源
    《The Science of the Total Environment》 |2018年第1期|469-481|共13页
  • 作者

    Robert Taube; Lars Ganzert; Hans-Peter Grossart; Gerd Gleixner; Katrin Premke;

  • 作者单位

    Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB). Dept. Chemical Analytics and Biogeochemistry, 12587 Berlin. Germany,Leibniz Centre for Agricultural Landscape Research (ZALF), Institute of Landscape Biogeochemistry, 15374 Muencheberg, Germany;

    Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Dept. Experimental Limnology, 16775 Stechlin, Germany;

    Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB), Dept. Experimental Limnology, 16775 Stechlin, Germany,Potsdam University, Institute for Biochemistry and Biology, 14469 Potsdam, Germany;

    Max Planck Institute for Biogeochemistry, Jena, Germany;

    Leibniz Institute of Freshwater Ecology and Inland Fisheries (IGB). Dept. Chemical Analytics and Biogeochemistry, 12587 Berlin. Germany,Leibniz Centre for Agricultural Landscape Research (ZALF), Institute of Landscape Biogeochemistry, 15374 Muencheberg, Germany;

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  • 正文语种 eng
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  • 关键词

    PLFA; PARAFAC; Size exclusion chromatography (SEC); Aquatic fungi; Stable isotopes; FASTAR;

    机译：PLFA;PARAFAC;尺寸排阻色谱法（SEC）;水生真菌;稳定同位素;法斯塔;

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