2011年9月
Distribution and Diversity of Anaerobic Ammonium Oxidation (Anammox) Bacteria in the Sediment of a Eutrophic Freshwater Lake, Lake Kitaura, Japan
MICROBES AND ENVIRONMENTS
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- 巻
- 26
- 号
- 3
- 開始ページ
- 189
- 終了ページ
- 197
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1264/jsme2.ME10184
- 出版者・発行元
- JAPANESE SOC MICROBIAL ECOLOGY, DEPT BIORESOURCE SCIENCE
Although the emission of N(2) 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 (15)N-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 NH(4)(+) and NO(3)(-) existed in the sediment. These results suggest the contribution of anammox bacteria to the total emission of N(2) 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 N(2) from Lake Kitaura.
- リンク情報
- ID情報
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- DOI : 10.1264/jsme2.ME10184
- ISSN : 1342-6311
- Web of Science ID : WOS:000294462200001