Analyses of the dynamic structure of organic matter-bacteria interactions that mediate carbon cycling in meso- and bathypelagic oceans

2010 Fiscal Year Final Research Report

• Project/Area Number: 20310010
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Research Field: Environmental dynamic analysis
• Research Institution: The University of Tokyo
• Principal Investigator: NAGATA Toshi The University of Tokyo, 大気海洋研究所, 教授 (40183892)
• Co-Investigator(Kenkyū-buntansha): HAMASAKI Koji 東京大学, 大気海洋研究所, 准教授 (80277871)
• Project Period (FY): 2008 – 2010
• Keywords: 海洋 / 微生物 / 有機物 / 炭素循環 / 中深層 / 安定同位体 / 生物地球化学 / 原核生物

Research Abstract

In order to contribute to a better understanding of oceanic carbon cycling, this study examined organic matter transformation and degradation mediated by microbes in the meso- and bathypelagic layers of the oceans. Data collected on full-depth distribution patterns of microbes in the Arctic and the western North Pacific Oceans were used to compare the magnitude of and spatiotemporal patterns in organic matter fluxes in widely different oceanic regions. In addition, using compound-specific nitrogen stable isotope ratios of amino acids, we developed a novel approach to examine the processes involved in organic transformations in deep waters.

Research Products

• [Journal Article] Bacterial carbon content and the living and detrital bacterial contributions to suspended particulate organic carbon in the North Pacific Ocean. (2011)
  • Author(s): Kawasaki N., Sohrin, R., Ogawa, H., Nagata, T., Benner, R.
  • Journal Title: Aquatic Microbial Ecology. 62 Pages: 165-176
  • Peer Reviewed
• [Journal Article] Large-scale distribution patterns of virioplankton in the upper ocean. (2010)
  • Author(s): Yang Y., Motegi C., Yokokawa T., Nagata T.
  • Journal Title: Aquatic Microbial Ecology. 60 Pages: 233-246
  • Peer Reviewed
• [Journal Article] Emerging concepts on microbial processes in the bathypelagic ocean-ecology, biogeochemistry, and genomics. (2010)
  • Author(s): Nagata, T., Tamburini, C., Aristegui, J., Baltar, F., Bochdansky, A., Fonda-Umani, S., Fukuda, H., Gogou, A., Hansell, D.A., Hansman R.L., Herndl G.J., Panagiotopoulos, C., Reinthaler T., Sohrin,R., Verdugo, P., Yamada, N., Yamashita, Y., Yokokawa, T., Bartlett, D.H.
  • Journal Title: Deep-Sea Research II 57 Pages: 1519-1536
  • Peer Reviewed
• [Journal Article] Assessing the apparent imbalance between geochemical and biochemical indicators of meso-and bathypelagic biological activity : What the @$#! Is wrong with present calculations of carbon budgets (2010)
  • Author(s): Burd, A.B., Hansell, D.A., Steinberg, D.K., Anderson, T.R., Aristegui, J., Baltar, F., Beaupre, S.R., Buesseler, K.O., DeHairs, F., Jackson, G.A., Kadko, D.C., Koppelmann, R., Lampitt, R.S., Nagata, T., Reinthaler, T., Robinson, C., Robison, B.H., Tamburini, C., Tanaka, T.
  • Journal Title: Deep-Sea Research II. 57 Pages: 1557-1571
  • Peer Reviewed
• [Journal Article] Linking bacterial community structure to carbon fluxes in marine environments. (2010)
  • Author(s): Yokokawa, T., Nagata, T.
  • Journal Title: Journal of Oceanography 66 Pages: 1-12
  • Peer Reviewed
• [Journal Article] Vertically structured prokaryotic community can control the efficiency of the biological pump in the oceans. (2009)
  • Author(s): Miki, T., Giuggioli, L., Kobayashi, Y., Nagata, T., Levin, S.A.
  • Journal Title: Theoretical Ecology 2 Pages: 199-216
  • Peer Reviewed
• [Journal Article] Viral control of bacterial growth efficiency in marine pelagic environments. (2009)
  • Author(s): Motegi, C., Nagata, T., Miki, T., Weinbauer, M.G., Legendre, L., Rassoulzadegan, F.
  • Journal Title: Limnology and Oceanography 54 Pages: 1901-1910
  • Peer Reviewed
• [Journal Article] Addition of monomeric and polymeric organic substrates alleviates viral lytic pressure on bacterial communities in coastal seawaters. (2009)
  • Author(s): Motegi, C., Nagata, T.
  • Journal Title: Aquatic Microbial Ecology 57 Pages: 343-350
  • Peer Reviewed
• [Presentation] 西部北極海における原核微生物生産速度の全深度分布-中深層への有機炭素供給機構とその強度の評価- (2011)
  • Author(s): 内宮万里央・福田秀樹・小川浩史・永田俊
  • Organizer: Blue Earth '11
  • Place of Presentation: 東京海洋大(東京)
  • Year and Date: 2011-03-07
• [Presentation] Regional variability in viral distribution patterns in the upper ocean (2010)
  • Author(s): 永田俊、楊燕輝、茂手木千晶、横川太一
  • Organizer: IMBER-IMBIZO meeting
  • Place of Presentation: Crete、Greece
  • Year and Date: 2010-10-12
• [Presentation] 西部北極海における原核微生物生産速度-カナダ海盆域における全深度分布の特徴- (2010)
  • Author(s): 内宮万里央・福田秀樹・小川浩史・永田俊・西野茂人・菊地隆
  • Organizer: 2010年度日本海洋学会春季大会
  • Place of Presentation: 東京海洋大学(東京)
  • Year and Date: 2010-03-29
• [Presentation] 西部北極海における原核微生物の生物量および生産速度-陸棚から海盆域にかけた全深度分布特性- (2010)
  • Author(s): 内宮万里央・福田秀樹・小川浩史・永田俊
  • Organizer: Blue Earth '10
  • Place of Presentation: 東京海洋大(東京)
  • Year and Date: 2010-03-02
• [Presentation] Prokaryote production in the mesopelagic layer of the western Arctic Ocean (2010)
  • Author(s): M.Uchimiya, H.Fukuda, H.Ogawa, T.Nagata
  • Organizer: American Society for Limnology and Oceanography 2011 Aquatic Science Meeting
  • Place of Presentation: San Juan, Puerto Rico
  • Year and Date: 2010-02-17
• [Presentation] Microbes in the twilight zone : Regional variability in responses to the addition of dissolved organic carbon (2009)
  • Author(s): M.Uchimiya, H.Ogawa, T.Nagata
  • Organizer: The 11th Symposium on Aquatic Microbial Ecology
  • Place of Presentation: Piran, Slovenia
  • Year and Date: 2009-08-31
• [Presentation] Potential roles of water mixing in the spatio-temporal dynamics of prokaryotic community and the functioning of the biological pump (2009)
  • Author(s): T.Miki, L.Giuggioli, Y.Kobayashi, T.Nagata, S.A.Levin
  • Organizer: ASLO Aquatic Sciences Meeting
  • Place of Presentation: Nice, France
  • Year and Date: 2009-01-30
• [Presentation] Large-scale variations in full depth distribution of prokaryotic production in the central Pcific (2008)
  • Author(s): 永田俊、横川太一
  • Organizer: IMBER-IMBIZO meeting
  • Place of Presentation: Florida、U.S.A.
  • Year and Date: 2008-11-10
• [Book] 海と生命-「海の生命観」を求めて-(ed.by塚本勝巳)(海のなかのミクロな環)第21章 (2009)
  • Author(s): 永田俊
  • Total Pages: 306-322
  • Publisher: 東海大学出版会
• [Remarks] ホームページ等
  • URL: http://co.ori.u-tokyo.ac.jp/mbcg/j/members/nagata/index.html