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2010 Fiscal Year Final Research Report

Ecosystem responses by epipelagic organisms to dust flux and its feedback to climate

Planned Research

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Project AreaLinkages in biogeochemical cycles between surface ocean and lower atmosphere
Project/Area Number 18067008
Research Category

Grant-in-Aid for Scientific Research on Priority Areas

Allocation TypeSingle-year Grants
Review Section Science and Engineering
Research InstitutionThe University of Tokyo

Principal Investigator

TSUDA Atsushi  東京大学, 大気海洋研究所, 教授 (80217314)

Co-Investigator(Kenkyū-buntansha) MICHIDA Yutaka  東京大学, 大気海洋研究所, 教授 (20323628)
SAITO Hiroaki  (独)水産総合研究センター, 東北区水産研究所, 室長 (30371793)
TAKAHASHI Kazutaka  (独)水産総合研究センター, 東北区水産研究所, 主任研究員 (00301581)
SUZUKI Koji  北海道大学, 地球環境科学研究院, 准教授 (40283452)
Project Period (FY) 2006 – 2010
Keywords鉄 / ダスト / 生態系変動 / 亜熱帯太平洋 / 動物プランクトン / 台風
Research Abstract

This group provided the biological information to the group who studied the biogenic gasses such as DMS to understand the mechanisms of the variation. Some on-deck incubation experiments showed that diatoms are most important phytoplankton enhanced by typhoon passing and suggested possibilities of altering the carbon cycling and food web structure. Argo-floats with a chlorophyll sensor were deployed. Although we have not observed a typhoon passing, some anomalies of high chlorophyll concentration have been observed. We also found that many copepod species showed seasonal vertical migration behavior, which had recognized as characteristic behavior to polar zooplankton. These results suggest that biological production in the subtropical Pacific is largely depend on the unpredictable spatial and temporal variability of primary production.

  • Research Products

    (10 results)

All 2010 2009 2008 2007 2006 Other

All Journal Article (5 results) (of which Peer Reviewed: 5 results) Presentation (3 results) Book (1 results) Remarks (1 results)

  • [Journal Article] Downward carbon transport by diel vertical migration of the copepods Metridia pacifica and Metridia okhotensis in the Oyashio region of the western subarctic Pacific Ocean2009

    • Author(s)
      Takahashi, K., A. Kuwata, H. Sugisaki, K. Uchikawa and H. Saito
    • Journal Title

      Deep Sea Research I

      Volume: 56 Pages: 1777-1791

    • Peer Reviewed
  • [Journal Article] Meso- and microzooplankton responses to an in situ iron fertilization experiment (SEEDS-II) in the northwest subarctic Pacific2009

    • Author(s)
      Tsuda, A., H. Saito, R.J. Machida, S. Shimode
    • Journal Title

      Deep-Sea Research II

      Volume: 56 Pages: 2767-2778

    • Peer Reviewed
  • [Journal Article] Community structure and photosynthetic physiology of phytoplankton in the northwest subarctic Pacific during an in situ iron fertilization experiment (SEEDS II)2009

    • Author(s)
      Suzuki, K., H. Saito, T. Isada, A. Hattori, H. Kiyosawa, J. Nishioka, R. M.L. McKay, A. Kuwata, A. Tsuda
    • Journal Title

      Deep-Sea Research II

      Volume: 56 Pages: 2733-2744

    • Peer Reviewed
  • [Journal Article] Evidence for the grazing hypothesis: Grazing reduces phytoplankton responses of the HNLC ecosystem to iron enrichment in the western subarctic Pacific (SEEDS II)2007

    • Author(s)
      Tsuda, A., H. Saito, K. Suzuki, 他41名
    • Journal Title

      Journal of Oceanography

      Volume: 63 Pages: 983-994

    • Peer Reviewed
  • [Journal Article] Mesoscale iron enrichment experiments 1993-2005: Synthesis and future direction2007

    • Author(s)
      Boyd, P.W., T. Jickells, C.S. Law, S. Blain, E.A., Boyle, K.O. Buesseler, K.H. Coale, J.J. Cullen, H.J.W. de Baar, M. Follows, M. Harvey, C. Lancelot, M. Levasseur, N.P.J. Owens, R. Pollard, R.B. Rivkin, J. Sarmiento, V. Schoemann, V. Smetacek, S. Takeda, A. Tsuda, S. Turner, A.J. Watson
    • Journal Title

      Science

      Volume: 315 Pages: 612-617

    • Peer Reviewed
  • [Presentation] Western Pacific Air-Sea Interaction Study (W-PASS), Introduction and highlights2010

    • Author(s)
      Tsuda, A.
    • Organizer
      AGU Fall Meeting 2010
    • Place of Presentation
      San Francisco USA(Invited)
    • Year and Date
      2010-12-13
  • [Presentation] Perturbation experiments with iron in the subarctic Pacific: Zooplankton responses and its consequences2008

    • Author(s)
      Tsuda, A.
    • Organizer
      5th World Fisheries Congress
    • Place of Presentation
      Yokohama(Invited Keynote)
    • Year and Date
      2008-10-20
  • [Presentation] 北太平洋での海洋鉄散布実験における生物・化学的応答2006

    • Author(s)
      津田敦・武田重信
    • Organizer
      第30回日本鉄バイオサイエンス学会学術集会
    • Place of Presentation
      東京(invited)
    • Year and Date
      2006-09-16
  • [Book] 海洋鉄散布と地球環境, 鉄137億年の宇宙誌(宮本英明・橘省吾編)2009

    • Author(s)
      津田敦
    • Total Pages
      103-108
    • Publisher
      東京大学総合研究博物館
  • [Remarks]

    • URL

      http://www.ecosystem.ori.u-tokyo.ac.jp/plankton/main/planktonj.html

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Published: 2013-07-31  

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