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Dynamics of dissolved organic nitrogen in the ocean obtained by using high-sensitive and high-resolution method

Research Project

Project/Area Number 16540445
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field Geochemistry/Astrochemistry
Research InstitutionThe University of Tokyo

Principal Investigator

OGAWA Hiroshi  The University of Tokyo, Ocean Research Institute, Associate Professor, 海洋研究所, 助教授 (50260518)

Project Period (FY) 2004 – 2005
Project Status Completed (Fiscal Year 2005)
Budget Amount *help
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2005: ¥1,600,000 (Direct Cost: ¥1,600,000)
Fiscal Year 2004: ¥1,900,000 (Direct Cost: ¥1,900,000)
KeywordsDissolved organic nitrogen(DON) / Dissolved organic carbon(DOC) / C : N ratio / High-sensitive and high-resolution analysis / Nitrogen cycling / Ocean / Elemental analysis / C:N比
Research Abstract

A high-sensitive and high-resolution method for measuring dissolved organic nitrogen (DON) in seawater has been established, which consists of a high-temperature combustion unit and a chemiluminescence detector. The international program for instrument comparison for measurement of DON in seawater confirmed that this system has a high performance to obtain accurate and precious data of DON in seawater. By using this system, the detailed distribution of DON in a variety of sea area and biological processes of DON in incubation experiments were obtained as follows: surface oceans in the western North Pacific along 165 E longitude and along A line of Oyashio region, Arakawa estuary in Tokyo Bay, and microbial decomposition process of DON in surface waters in the western. North Pacific and release process of DON by coral. The system is designed for simultaneous measurement of dissolved organic carbon (DOC) with DON, so that it has been made possible that DON dynamics is directly compared with those of DOC, and characteristics of C:N ratio of dissolved organic matter (DOM) is discussed. Consequently it was found that relatively C-rich DOM was stably accumulating in oligotrophic area and unproductive season, whereas N-rich DOM was temporally accumulating in high latitude area especially in productive season. Amino acids in DOM (Total Dissolved Amino acids: TDAA), as typical nitrogenous organic compounds and most major identifiable component of DON, were also determined for some oceanic samples. The proportions of amino acids' carbon (TDAA-C) to DOC (0.8-1.8%) and amino acids' nitrogen (TDAA-N) to DON (8-18%) were obtained. Both proportions of TDAA-C/DOC and TDAA-N/DON showed a tendency to be high in productive area of high latitude and low in oligotrophic area of low latitude, suggesting DOM in productive area contained more biogenic and fresh components, whereas more altered components mainly composed DOM in oligotrophic area.

Report

(3 results)
  • 2005 Annual Research Report   Final Research Report Summary
  • 2004 Annual Research Report
  • Research Products

    (13 results)

All 2006 2004 Other

All Journal Article (12 results) Book (1 results)

  • [Journal Article] Effect of nitrate enrichment on release of organi c carbon and nitrogen from zooxanthellate coral, Acropora pulchra and Porites cylindrical2006

    • Author(s)
      Tanaka Y., T.Miyajima, Y.Umezawa, H.Fukuda, I.Koike, H.Ogawa, T.Hayashibara
    • Journal Title

      Proceedings of the 10th International Coral Reef Symposium

      Pages: 925-931

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Temporal variability of stable carbon and nitrogen isotopic composition of size-fractionated particulate organic matter in the hypertrophic Sumida River Estuary of Tokyo Bay, Japan2006

    • Author(s)
      Sato T., T.Miyajima, H.Ogawa, Y.Umezawa, I.Koike
    • Journal Title

      Estuarine, Coastal and Shelf Science 68

      Pages: 245-258

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Translocation and conservation of organic nitrogen within the coral-zooxanthella symbiotic system of Acropora pulchra, as demonstrated by dual isotope-labeling techniques2006

    • Author(s)
      Tanaka Y, T.Miyajima, I.Koike, T.Hayashibara, H.Ogawa
    • Journal Title

      J. Exp. Mar. Biol. Ecol. 印刷中

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Contribution of Water Soluble Organic Nitrogen to Total Nitrogen in Marine Aerosols over the East China Sea and Western North Pacific2006

    • Author(s)
      Nakamura T., H.Ogawa, D.K.Maripi, M.Uematsu
    • Journal Title

      Atmospheric Environment 印刷中

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Effect of nitrate enrichment on release of organic carbon and nitrogen from zooxanthellate coral, Acropora pulchra and Porites cylindrical2006

    • Author(s)
      Tanaka Y., T.Miyajima, Y.Umezawa, H.Fukuda, I.Koike, H Ogawa, T.Hayashibara
    • Journal Title

      Proceedings of the 10th International Coral Reef Symposium

      Pages: 925-931

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A direct instrument comparison for measurement of total dissolved nitrogen in seawater2004

    • Author(s)
      Sharp J.H.et al.(他14名 8番目)
    • Journal Title

      Marine Chemistry 84

      Pages: 181-193

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The decline and fate of an iron-induced subarctic phytoplankton bloom2004

    • Author(s)
      Boyd P.W.et al.(他37名 26番目)
    • Journal Title

      Nature 428

      Pages: 549-553

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] A direct instrument comparison for measurement of total dissolved nitrogen in seawater2004

    • Author(s)
      Sharp, J.H., A.Y.Beauregard, D.Burdige, G.Cauwet, S.Curless, R.Lauck, K.Nagel, H.Ogawa, A.E.Parker, O.Primm, M.Pujo-pay, W.S.Savidge, S.Seitzinger, G.Spyres, R.Styles
    • Journal Title

      Marine Chemistry 84

      Pages: 181-193

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] The decline and fate of an iron-induced subarctic phytoplankton bloom2004

    • Author(s)
      Boyd, P.W., C.S.Benner, C.S.Wong, Y.Nojiri, A.Tsuda, M.Levasseur, S.Takeda, R.Rivkin, P J.Harrison, R.Strzepek, J.Gower, R.M.Mckay, E.Abraham, M.Arychuk, J Barwell-clarke, W.Crawford, M.Hale, K.Harada, K.Johnson, H.Kiyosawa, I.Kudo, A.Marchetti, W.Miller, J.Needoba, J.Nishioka, H.Ogawa, J.Page, M.Robert, H.Saito, A.Sastri, N.Sherry, T.Soutar, N.Sutherland, Y.Taira, F.Whitney, Shau-King.E.Wong, T.Yoshimura
    • Journal Title

      Nature 428

      Pages: 549-553

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Determination of organic matter in seawater.2004

    • Author(s)
      H.Ogawa
    • Journal Title

      In : Advanced analytical methods-from science & technology to nano-& bio-technology-(in Japanese), NT.S, Tokyo

      Pages: 1000-1000

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Translocation and conservation of organic nitrogen within the coral-zooxanthella symbiotic system of Acropora pulchra, as demonstrated by dual isotope-labeling techniques

    • Author(s)
      Tanaka Y, T.Miyajima, I.Koike, T.Hayashibara, H.Ogawa
    • Journal Title

      J Exp. Mar. Biol. Ecol. (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Journal Article] Contribution of water soluble organic nitrogen to total nitrogen in marine aerosols over the East China Sea and Western North Pacific

    • Author(s)
      Nakamura T., H.Ogawa, D.K.Maripi, M.Uematsu
    • Journal Title

      Atmospheric Environment (in press)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2005 Final Research Report Summary
  • [Book] 海水中の有機物定量、先端の分析法-理工学からナノ・バイオまで-2004

    • Author(s)
      小川 浩史(分担)
    • Total Pages
      1000
    • Publisher
      (株)エヌ・ティー・エス
    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2005 Final Research Report Summary

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Published: 2004-04-01   Modified: 2016-04-21  

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