Distribution and Diversity of Anaerobic Ammonium Oxidation (Anammox) Bacteria in the Sediment of a Eutrophic Freshwater Lake, Lake Kitaura, Japan

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  • Yoshinaga Ikuo
    Laboratory of Marine Microbiology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • Amano Teruki
    Laboratory of Marine Microbiology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • Yamagishi Takao
    Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology
  • Okada Kentaro
    Laboratory of Marine Microbiology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • Ueda Shingo
    College of Bioresource Sciences, Nihon University
  • Sako Yoshihiko
    Laboratory of Marine Microbiology, Division of Applied Biosciences, Graduate School of Agriculture, Kyoto University
  • Suwa Yuichi
    Research Institute for Environmental Management Technology, National Institute of Advanced Industrial Science and Technology

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  • Distribution and diversity of anaerobic ammonium oxidation (anammox) bacteria in the sediment of a eutrophic freshwater lake, lake kitaura
  • Distribution and diversity of anaerobic ammonium oxidation Anammox, bacteria the sediment of a eutrophic freshwater lake, Lake Kitaura,

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Abstract

Although the emission of N2 via anaerobic ammonium oxidation (anammox) is a key process in the elimination of nitrogenous compounds from aquatic environments, little information is available regarding its significance and the relevant microorganisms (anammox bacteria) in eutrophic freshwater lakes. In the present study, the anammox bacteria in the sediment of a eutrophic lake in Japan, Lake Kitaura, were examined using a 15N-tracer technique to measure their potential anammox activity. Potential anammox activity was localized to the northern region of the lake where a stable supply of both NH4+ and NO3- existed in the sediment. These results suggest the contribution of anammox bacteria to the total emission of N2 from sediment in this eutrophic lake to not be negligible. Moreover, selective PCR successfully amplified anammox bacteria-related (Brocadiales-related) 16S rRNA genes from sediment samples in which potential anammox activity was observed. The clone libraries consisted of diverse phylotypes except the genus “Scalindua”-lineages, and the lineages of genus “Brocadia” were dominantly recovered, followed by the genus “Kuenenia”-lineages. Most of them, however, were novel and phylogenetically distinguishable from known Brocadiales species. A unique population of anammox bacteria inhabits and potentially contributes to the emission of N2 from Lake Kitaura.<br>

Journal

  • Microbes and Environments

    Microbes and Environments 26 (3), 189-197, 2011

    Japanese Society of Microbial Ecology / Japanese Society of Soil Microbiology / Taiwan Society of Microbial Ecology / Japanese Society of Plant Microbe Interactions / Japanese Society for Extremophiles

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