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Tempo-spatial patterns of bacterial community composition in the western North Pacific Ocean

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タイトル: Tempo-spatial patterns of bacterial community composition in the western North Pacific Ocean
著者: Kataoka, Takafumi 著作を一覧する
Hodoki, Yoshikuni 著作を一覧する
Suzuki, Koji 著作を一覧する
Saito, Hiroaki 著作を一覧する
Higashi, Seigo 著作を一覧する
キーワード: Marine bacteria
Pacific Ocean
発行日: 2009年 4月
出版者: Elsevier B.V.
誌名: Journal of Marine Systems
巻: 77
号: 1-2
開始ページ: 197
終了ページ: 207
出版社 DOI: 10.1016/j.jmarsys.2008.12.006
抄録: In the western North Pacific, where subarctic Oyashio waters encounter subtropical Kuroshio waters, phylotype composition of heterotrophic bacteria was estimated by denaturing gradient gel electrophoresis (DGGE) of PCR-amplified bacterial 16S ribosomal DNA. Total bacterial abundance was also measured by flow cytometry. The study area was divided into four water masses: coastal, Oyashio, Kuroshio, and the Kuroshio-Oyashio transition. Abundances of heterotrophic bacteria in the Oyashio, Kuroshio, and Kuroshio-Oyashio transition regions ranged from 0.2 x 10^[5] cells mL^[-1] to 1.4 x 10^[5] cells mL^[-1] and were not significantly different, except in the Oyashio region during September. Bacterial compositions were distinct in each water mass. Furthermore, phylotype distributions differed between surface and subsurface waters in the Kuroshio-Oyashio transition region. Out of 61 DGGE bands obtained, 41 were successfully identified as 31 phylotypes: 22 Gammaproteobacteria, 4 Alphaproteobacteria, 2 unknown bacteria, 2 cyanobacteria, and 1 plastid. Although the Gammaproteobacteria OM60 clade was eurytopic in the study area, Psychrobacter glacincola and the uncultured Gammaproteobacteria SAR92 clade were often observed in the Oyashio region. Overall, our results indicated that Gammaproteobacteria were predominant in the bacterial community, which was influenced by the hydrographic properties of each water mass in the study area.
資料タイプ: article (author version)
出現コレクション:雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

提供者: 東 正剛


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