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2009 Fiscal Year Annual Research Report

ダスト降下に伴う海洋表層生物群集の応答と気候へのフィードバック

Planned Research

Project AreaLinkages in biogeochemical cycles between surface ocean and lower atmosphere
Project/Area Number 18067008
Research InstitutionThe University of Tokyo

Principal Investigator

津田 敦  The University of Tokyo, 海洋研究所, 准教授 (80217314)

Co-Investigator(Kenkyū-buntansha) 道田 豊  東京大学, 海洋研究所, 教授 (20323628)
齊藤 宏明  (独)水産総合研究センター, 東北区水産研究所, 室長 (30371793)
高橋 一生  (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)
鈴木 光次  北海道大学, 地球環境科学研究院, 准教授 (40283452)
Keywords鉄 / 窒素固定 / 亜熱帯太平洋 / ダスト / 台風 / 生態系応答
Research Abstract

平成20年夏季の西部北太平洋域において採取した植物プランクトンおよび窒素固定生物の群集組成をより詳細に解析した.その結果,亜寒帯循環域において相対的に高い基礎生産力および高い光合成水柱光利用効率を支えていた植物プランクトンが主にOdontella属及びFragilariopsis属の珪藻種であったことが今年度購入した走査型電子顕微鏡により明らかとなった.今まで西部北太平洋亜寒帯循環域の植物プランクトンによる基礎生産力および光合成水中光利用効率は年間を通して低いと考えられてきたが,本研究によりそれら値は時空間的に大きく変動することが示唆された.また,台風通過後の亜熱帯海域の植物プランクトン群集を評価する模擬培養実験の試料において,有殻黄金藻種は希であったことが判明した.この結果について,現在,投稿論文を作成中である.さらに,定量PCR法及び変成剤濃度勾配ゲル電気泳動(DGGE)法により,熱帯および亜熱帯域における窒素固定生物は顕著な空間的棲み分けをしていたことが解明された.その要因として,水温および海水中のリン酸塩濃度の違いが寄与していたことが本研究によって明らかとなった.その成果の一部は,現在,投稿論文として国際誌に投稿中である.平成22年夏季における西部北太平洋,ベーリング海及びアリューシャン列島海域表層における植物プランクトン群集の光合成特性を,今年度購入したFIRe蛍光光度計を用いて,連続的に測定する試みを行った.残念ながら,本装置の解析プログラムにバグがあることが判明したが,今年度来にはデバッグに成功したので,平成22年度の西部北太平洋亜熱帯域における航海で同様の試みを実施し,台風通過後の植物プランクトン群集の応答を解析する際に役立てる予定である.

  • Research Products

    (43 results)

All 2010 2009

All Journal Article (26 results) (of which Peer Reviewed: 24 results) Presentation (16 results) Book (1 results)

  • [Journal Article] Distributions of short-lived iodocarbons and biogenic trace gases in the open ocean and atmosphere in the western North Pacific2010

    • Author(s)
      Kurihara, M.K.
    • Journal Title

      Marine Chemistry 118

      Pages: 156-170

    • Peer Reviewed
  • [Journal Article] Fe deficiency in micro-sized diatoms in the Oyashio region of the western subarctic Pacific during spring2010

    • Author(s)
      Hattori-Saito, A.
    • Journal Title

      Journal of Oceanography 66

      Pages: 117-132

    • Peer Reviewed
  • [Journal Article] Temporal and spatial variations of phytoplankton photosynthetic physiology during the spring bloom in the western subarctic Pacific2010

    • Author(s)
      Yoshie, N
    • Journal Title

      Marine Ecology Progress Series 399

      Pages: 39-52

    • Peer Reviewed
  • [Journal Article] Single particle analysis of oceanic suspended matter during the SEEDS II iron fertilization experiment2009

    • Author(s)
      Iwamoto, Y.
    • Journal Title

      Marine Chemistry 113

      Pages: 212-218

    • Peer Reviewed
  • [Journal Article] Enrichment of alkanes within a phytoplankton bloom during an in situiron enrichment experiment in the western subarctic Pacific2009

    • Author(s)
      Kameyama, S.
    • Journal Title

      Marine Chemistry 115

      Pages: 92-101

    • Peer Reviewed
  • [Journal Article] The response of the virus community to the SEEDS II mesoscale iron fertilization2009

    • Author(s)
      Higgins, J.L.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2788-2795

    • 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.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2733-2744

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

    • Author(s)
      津田敦
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2767-2778

    • Peer Reviewed
  • [Journal Article] Temporal changes in community composition of heterotrophic bacteria during in situ iron enrichment in the western subarctic Pacific(SEEDS-II)2009

    • Author(s)
      Kataoka, T.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2779-2787

    • Peer Reviewed
  • [Journal Article] Changes in iron concentrations and bio-availability during an open ocean mesoscale iron enrichment in the western subarctic Pacific, SEEDS II2009

    • Author(s)
      Nishioka, J.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2796-2809

    • Peer Reviewed
  • [Journal Article] Rare earth elements in seawater during an iron-induced phytoplankton bloom of the western subarctic Pacific(SEEDS-II)2009

    • Author(s)
      Hara, Y.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2839-2851

    • Peer Reviewed
  • [Journal Article] Biogeochemical cycling of N and Si during the mesoscale iron-enrichment experiment in the western subarctic Pacific(SEEDS-II)2009

    • Author(s)
      Saito, H
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2852-2862

    • Peer Reviewed
  • [Journal Article] Dynamics and elemental stoichiometry of carbon, nitrogen, and phosphorus in particulate and dissolved organic pools during a phytoplankton bloom induced by in situ iron enrichment in the western subarctic Pacific(SEEDS-II)2009

    • Author(s)
      Yoshimura, T.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2863-2874

    • Peer Reviewed
  • [Journal Article] Iron-induced alterations of bacterial DMSP metabolism in the western subarctic Pacific during SEEDS-II2009

    • Author(s)
      Lizotte, M.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2889-2898

    • Peer Reviewed
  • [Journal Article] Responses of DMS in the seawater and atmosphere to iron enrichment in the subarctic western North Pacific(SEEDS II)2009

    • Author(s)
      Nagao, I.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2899-2917

    • Peer Reviewed
  • [Journal Article] Physical behaviors of iron fertilized patch in SEEDS II2009

    • Author(s)
      Tsumune, D.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2948-2957

    • Peer Reviewed
  • [Journal Article] Introduction to subarctic iron enrichment for ecosystem dynamics study II SEEDS II2009

    • Author(s)
      Uematsu, M.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2948-2957

  • [Journal Article] Primary production, bacterial production and nitrogen assimilation dynamics during the SEEDS-II experiment2009

    • Author(s)
      Kudo, I.
    • Journal Title

      Deep-Sea Research II 56

      Pages: 2755-2766

    • Peer Reviewed
  • [Journal Article] 海と鉄と地球環境2009

    • Author(s)
      津田敦
    • Journal Title

      岩波科学 79

      Pages: 1133-1137

  • [Journal Article] Transport of subarctic large copepods from the Oyashio area to the mixed water region by the coastal Oyashio intrusion2009

    • Author(s)
      Shimizu, Y.
    • Journal Title

      Fisheries Oceanography 18

      Pages: 312-327

    • Peer Reviewed
  • [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.
    • Journal Title

      Deep Sea Research I 56

      Pages: 1777-1791

    • Peer Reviewed
  • [Journal Article] Photosynthetic features and primary productivity of phytoplankton in the Oyashio and the Kuroshio-Oyashio transition regions of the northwest Pacific2009

    • Author(s)
      Isada, T.
    • Journal Title

      Journal of Plankton Research 31

      Pages: 1009-1025

    • Peer Reviewed
  • [Journal Article] Tempo-spatial patterns of bacterial community composition in the western North Pacific Ocean2009

    • Author(s)
      Kataoka, T.
    • Journal Title

      Journal of Marine Systems 77

      Pages: 197-207

    • Peer Reviewed
  • [Journal Article] Detection of UVBR-sensitive and-tolerant bacteria in surface waters of the western North Pacific2009

    • Author(s)
      Kataoka, T.
    • Journal Title

      Journal of Photochemistry and Photobiology B : Biology 95

      Pages: 108-116

    • Peer Reviewed
  • [Journal Article] Phytoplankton growth and microzooplankton grazing in the Sea of Okhotsk during late summer of 20062009

    • Author(s)
      Liu, H.
    • Journal Title

      Deep-Sea Research I 56

      Pages: 561-570

    • Peer Reviewed
  • [Journal Article] Phylogenetic diversity of marine Synechococcus in the Sea of Okhotsk2009

    • Author(s)
      Jing, H.
    • Journal Title

      Aquatic Microbial Ecology 56

      Pages: 55-63

    • Peer Reviewed
  • [Presentation] Sapphirina 属カイアシ類のウミタルに対する捕食行動-生態系における役割-2010

    • Author(s)
      高橋一生
    • Organizer
      2010年度日本海洋学会春季大会
    • Place of Presentation
      東京
    • Year and Date
      2010-03-30
  • [Presentation] Sapphirinid copepods as predators of doliolids : their contribution to doliolids mortality and sinking flux2010

    • Author(s)
      高橋一生
    • Organizer
      Ocean Sciences Meeting
    • Place of Presentation
      Portlan, USA
    • Year and Date
      2010-02-24
  • [Presentation] 西部北太平洋における植物プランクトンの光合成生理特性2009

    • Author(s)
      鈴木光次
    • Organizer
      東京大学海洋研究所共同利用シンポジウム新しい海洋区分の創設に向けた生物地球化学と生態学の統合研究
    • Place of Presentation
      東京
    • Year and Date
      2009-12-27
  • [Presentation] 西部北太平洋域における植物プランクトンの群期成と生産力2009

    • Author(s)
      鈴木光次
    • Organizer
      東京大学海洋研究所共同利用研究集会白鳳丸航海KH-08-02データシンセシス
    • Place of Presentation
      東京
    • Year and Date
      2009-12-20
  • [Presentation] 2008年夏季の西部北太平洋亜寒帯域における植物プランクトンによる水柱の光合成光利用効率の特性2009

    • Author(s)
      野坂裕一
    • Organizer
      東京大学海洋研究所共同利用研究集会白鳳丸航海KH-08-02データシンセシス
    • Place of Presentation
      東京
    • Year and Date
      2009-12-20
  • [Presentation] E Increase of mineral dust particles in the western North Pacific surface water during an Asian dust event2009

    • Author(s)
      Iwamoto, Y.
    • Organizer
      日本地球化学会
    • Place of Presentation
      広島
    • Year and Date
      2009-11-30
  • [Presentation] Summary of second iron enrichment experiment in the western subarctic Pacific(SEEDS II)2009

    • Author(s)
      津田敦
    • Organizer
      SOALS Open Science Conference
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2009-11-15
  • [Presentation] Primary production Enhancement by Typhoon in Western North Pacific2009

    • Author(s)
      Toratani, M.
    • Organizer
      SOALS Open Science Conference
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2009-11-15
  • [Presentation] Equilibrator inlet-prpton transfer reaction-mass spectrometry(EI-PTR-MS)for sensitive, high-resolution measurement of dimethyl sulfide dissolved in seawater2009

    • Author(s)
      亀山宗彦
    • Organizer
      SOALS Open Science Conference
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2009-11-13
  • [Presentation] High-rezolution measurement of multiple volatile organic compounds dissolved in seawater using equilibrator inlet-proton transfer reaction spectrometry(EI-PTR-MS)2009

    • Author(s)
      Tanimoto, H.
    • Organizer
      SOALS Open Science Conference
    • Place of Presentation
      Barcelona, Spain
    • Year and Date
      2009-11-13
  • [Presentation] Vertical distribution of large suspension feeding copepods in the Oyashio region during the growing period2009

    • Author(s)
      津田敦
    • Organizer
      PICES 18th Annual Meeting
    • Place of Presentation
      Jeju, Korea
    • Year and Date
      2009-10-30
  • [Presentation] Vertical and horizontal carbon transport through the ontogenetic vertical migration of copepods2009

    • Author(s)
      Saito, H.
    • Organizer
      Chapman conference on the Biological Carbon Pump of the Oceans
    • Place of Presentation
      Brockenhurst, Hampshire, England
    • Year and Date
      2009-10-09
  • [Presentation] EI-PTR-MSを用いた西部北太平洋亜寒帯域における溶存揮発性有機化合物(V0C)の高時間分解能測定2009

    • Author(s)
      亀山宗彦
    • Organizer
      日本海洋学会2009年秋季大会
    • Place of Presentation
      京都
    • Year and Date
      2009-09-27
  • [Presentation] 海洋鉄散布実験の成果と現状2009

    • Author(s)
      津田敦
    • Organizer
      海洋アライアンスイブニングセミナー
    • Place of Presentation
      東京
    • Year and Date
      2009-05-19
  • [Presentation] 台風擾乱に伴う西部北太平洋熱帯外洋域の植物プランクトン群集組成の変化2009

    • Author(s)
      鈴木光次
    • Organizer
      日本海洋学会春季大会
    • Place of Presentation
      東京
    • Year and Date
      2009-04-06
  • [Presentation] 西部北太平洋植物プランクトンブルームにおける細菌群集の動態解析2009

    • Author(s)
      多田雄哉
    • Organizer
      日本海洋学会春季大会
    • Place of Presentation
      東京
    • Year and Date
      2009-04-06
  • [Book] 鉄137億年の宇宙誌2009

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

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Published: 2011-06-16   Modified: 2016-04-21  

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