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Biocomplexity of the interactions of complex organic colloids and microbial communities in aquatic environments

Research Project

Project/Area Number 13308029
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Environmental dynamic analysis
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

NAGATA Toshi  Kyoto University, Center for Ecological Research, Professor, 生態学研究センター, 教授 (40183892)

Co-Investigator(Kenkyū-buntansha) KOIKE Isao  The University of Tokyo, Ocean Research Institute, Professor, 海洋研究所, 教授 (30107453)
KAWABATA Zenichiro  Kyoto University, Center for Ecological Research, Professor, 生態学研究センター, 教授 (80108456)
WADA Eitaro  Research Institute for Humanity and Nature, Professor, 教授 (40013578)
OGAWA Hiroshi  The University of Tokyo, Ocean Research Institute, Associate Professor, 海洋研究所, 助教授 (50260518)
KOGURE Kazuhiro  The University of Tokyo, Ocean Research Institute, Professor, 海洋研究所, 教授 (10161895)
森崎 久雄  立命館大学, 理工学部, 教授 (50125671)
Project Period (FY) 2001 – 2003
Project Status Completed (Fiscal Year 2003)
Budget Amount *help
¥50,700,000 (Direct Cost: ¥39,000,000、Indirect Cost: ¥11,700,000)
Fiscal Year 2003: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2002: ¥10,270,000 (Direct Cost: ¥7,900,000、Indirect Cost: ¥2,370,000)
Fiscal Year 2001: ¥30,160,000 (Direct Cost: ¥23,200,000、Indirect Cost: ¥6,960,000)
KeywordsDissolved organic matter / Marine colloids / Bacterial community / Organic matter degradation / Marine ecosystem / Biocomplexity / Microbial loop / Material cycling / 水圏物質循環 / 微生物群集 / コロイド / 地球環境 / 湖沼生態系 / 炭素循環 / 海洋 / 有機物 / 食物連鎖 / 鉛直フラックス / 細菌群集組成
Research Abstract

Dissolved and colloidal organic matter (DOM and COM) represents the largest reservoir of organic carbon in the oceans and play a substantial role in global cycling of carbon. In the present project, we were aimed at examining degradation of complex organic polymers in seawater and regulation mechanisms of bacterial communities in estuarine and coastal environments. We succeeded in developing a novel tracer technique to analyze transformation and degradation of complex organic polymers in seawater. Results showed that peptidoglycan, an important component of marine COM, is degraded more slowly than proteins, suggesting that complex polymers play a role in preservation of organic matter. Single-cell detection methods were used to investigate community dynamics and regulation of bacterial communities, which are responsible for degradation of DOM and COM. We found that bacterial community composition varies depending on substrate (DOM) supply, but the major flux of DOM and COM is generally driven by a limited number of bacterial groups such as alpha proteobacteria cluster. These results have implications for better modeling the biocomplex system consisting of DOC, COC and microbial communities.

Report

(4 results)
  • 2003 Annual Research Report   Final Research Report Summary
  • 2002 Annual Research Report
  • 2001 Annual Research Report
  • Research Products

    (25 results)

All Other

All Publications (25 results)

  • [Publications] Nagata, T., Fukuda, R., Fukuda, H., Koike I.: "Basin-Scale Geographic Patterns of Bacteriaplankton Biomass and Production in the Subarctic Pacific, July-September 1997."Journal of Oceanography. 57(3). 301-313 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Koike, I., Ogawa, H., Nagata, T., Fukuda, R., Fukda, H: "Silicate to Nitrate Ratio of the Upper Sub-Arctic Pacific and the Bering Sea Basin in Summer : Its Implication for Phytoplankton Dynamics."Journal of Oceanography. 57(3). 253-260 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 永田 俊: "海洋における「溶存有機物-微生物連鎖系」研究の新しい展開"日本プランクトン学会報. 49(1). 15-20 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 永田 俊: "溶存有機物の連鎖系"月刊海洋 号外. 29. 120-125 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nagata, T., Meon, B., Kirchman, D.L.: "Microbial degradation of peptidoglycan in seawater"Limnology and Oceanography. 48. 745-754 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yokokawa, T., T.Nagata, M.T.Cottrell, D.L.Kirchman: "Growth rate of the major phylogenetic bacterial groups in the Delaware"Limnology and Oceanography. (印刷中).

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 永田 俊: "「ミクロ生態系への招待」大串隆之編「生物多様性科学のすすめ」"丸善.

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] 永田 俊: "細菌の生物密度と現存量(竹内均監修)地球環境調査計測事典第2巻陸域編(2)"フジ・テクノシステム. 1162 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nagata, T., Fukuda, R., Fukuda, H., Koike I: "Basin-Scale Geographic Patterns of Bacterioplankton Biomass and Production in the Subarctic Pacific, July-September 1997"Journal of Oceanography. 57(3). 301-313 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Koike, I., Ogawa, H., Nagata, T., Fukuda, R., Fukuda, H.: "Silicate to Nitrate Ratio of the Upper Sub-Arctic Pacific and the Bering Sea Basin in Summer: Its Implication for Phytoplankton Dynamics"Journal of Oceanography. 57(3). 253-260 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Toshi Nagata: "Role of DOM-microbial systems in the oceans"Bull. Plankton Society (Japan). 49(1). 15-20 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Toshi Nagata: "Dynamics of dissolved organic matter"Monthly Kaiyo. 29. 120-125 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nagata, T., Meon, B., Kirchman, D.L.: "Microbial degradation of peptidoglycan in seawater"Limnology and Oceanography. 48. 745-754 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Yokokawa, T., T.Nagata, M.T.Cottrell, D.L.Kirchman: "Growth rate of the major phylogenetic bacterial groups in the Delaware estuary"Limnology and Oceanography. (in press). (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2003 Final Research Report Summary
  • [Publications] Nagata, T: "Microbial degradation of peptidoglycan in seawater"Limnology and Oceanography. 48. 745-754 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 永田 俊: "「ミクロ生態系への招待」大串隆之編「生物多様性科学のすすめ」"丸善. 186 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 永田 俊: "「細菌の生物密度と現存量」竹内均監修「地球環境調査計測辞典2巻陸域篇(2)」"フジ・テクノシステム. 1162 (2003)

    • Related Report
      2003 Annual Research Report
  • [Publications] 永田 俊: "海洋における「溶存有機物-微生物連鎖系」研究の新しい展開"日本プランクトン学会報. 49(1). 15-20 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 永田 俊: "溶存有機物の連鎖系"月刊海洋. 29. 120-125 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] Nagata, T., Benedikt.M, Kirchman, D.L.: "Microbial degradation of peptidoglycan in seawater"Limnology and Oceanography. 48. 745-754 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] 永田 俊: "第6章 ミクロ生態系への招待-水のなかに生きる小さな生命たちの働きと多様性。In :生物多様性科学のすすめ(大串隆之編)"丸善. 110-135 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] Koike, I., Ogawa, H., Nagata, T., Fukuda, R., Fukuda, H.: "Silicate to Nitrate Ratio of the Upper Sub-Arctic Pacific and the Bering Sea Basin in Summer: Its Implication for Phytoplankton Dynamics"Journal of Oceanography. 57(3). 253-260 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Nagata, T., Fukuda, R., Fukuda, H., Koike, I.: "Basin-Scale Geographic Patterns of Bacterioplankton Biomass and Production in the Subarctic Pacific,July-September 1997"Journal of Oceanography. 57(3). 301-313 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] Aranami, K., Watanabe, S., Tsunogai, S., Hayashi, M., Furuya, K., Nagata, T.: "Biogeochemical Variation in Dimethylsulfide,Phytoplankton Pigments and Heterotrophic Bacterial Production in the Subarctic North Pacific during Summer"Journal of Oceanography. 57(3). 315-322 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] 永田 俊: "海洋における「溶存有機物-微生物連鎖系」研究の新しい展開"日本プランクトン学会報. 49(1). 15-20 (2002)

    • Related Report
      2001 Annual Research Report

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Published: 2001-04-01   Modified: 2016-04-21  

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