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Effects of ocean acidification on Fe availability and plankton productivity in the subarctic North Pacific

Research Project

Project/Area Number 17H04479
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section海外学術
Research Field Environmental dynamic analysis
Research InstitutionNagasaki University

Principal Investigator

TAKEDA Shigenobu  長崎大学, 水産・環境科学総合研究科(水産), 教授 (20334328)

Co-Investigator(Kenkyū-buntansha) 津旨 大輔  一般財団法人電力中央研究所, 環境科学研究所, 上席研究員 (10371494)
三角 和弘  一般財団法人電力中央研究所, 企画グループ, 上席 (10462889)
Project Period (FY) 2017-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥15,990,000 (Direct Cost: ¥12,300,000、Indirect Cost: ¥3,690,000)
Fiscal Year 2019: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2018: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2017: ¥5,720,000 (Direct Cost: ¥4,400,000、Indirect Cost: ¥1,320,000)
Keywords海洋科学 / 植物プランクトン / 鉄 / 海洋酸性化 / 北太平洋
Outline of Final Research Achievements

The effects of ocean acidification on the bioavailability of organically complexed iron to phytoplankton was investigated in the subarctic North Pacific. In the productive western North Pacific, the decrease in pH made it difficult for diatoms to utilize organically complexed iron, whereas no significant effects were observed in the iron-scarce eastern North Pacific, suggesting that phytoplankton responses to ocean acidification may be different in the eastern and western North Pacific. Numerical experiments using an ocean iron circulation model suggest that future ocean acidification and decrease in iron availability will result in a net increase in primary production in the whole North Pacific.

Academic Significance and Societal Importance of the Research Achievements

大気から海洋表層への二酸化炭素の溶解に伴う海洋酸性化は、微量栄養素の一つである鉄の生物利用にも影響を及ぼすと考えられる。本研究では、鉄が植物プランクトン生産の主要な制限要因となって北太平洋亜寒帯域の東西海域において、植物プランクトンによる有機錯体鉄の利用を海洋酸性化が抑制する作用が大きく異なることを明らかにした。このことから、将来の海洋酸性化に対する海洋生態系の応答を予測する上で、海域による鉄の存在形態の違いを考慮することの重要性が示された。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • Research Products

    (32 results)

All 2020 2019 2018 2017 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 4 results,  Open Access: 1 results) Presentation (24 results) (of which Int'l Joint Research: 12 results,  Invited: 1 results)

  • [Int'l Joint Research] メーン大学/米国大気研究センター(米国)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] National Center for Atmospheric Research/University of Maine(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] メーン大学/米国大気研究センター(米国)

    • Related Report
      2017 Annual Research Report
  • [Journal Article] Sub-polar marginal seas fuel the North Pacific through the intermediate water at the termination of the global ocean circulation2020

    • Author(s)
      Jun Nishioka、Hajime Obata、Hiroshi Ogawa、Kazuya Ono、Youhei Yamashita、Keun Jong Lee、Shigenobu Takeda、Ichiro Yasuda
    • Journal Title

      Proceedings of the National Academy of Sciences of the United States of America

      Volume: -

    • NAID

      120006937024

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Impacts of direct release and river discharge on oceanic 137Cs derived from the Fukushima Dai-ichi Nuclear Power Plant accident2020

    • Author(s)
      Tsumune Daisuke、Tsubono Takaki、Misumi Kazuhiro、Tateda Yutaka、Toyoda Yasushi、Onda Yuichi、Aoyama Michio
    • Journal Title

      Journal of Environmental Radioactivity

      Volume: 214-215 Pages: 106173-106173

    • DOI

      10.1016/j.jenvrad.2020.106173

    • NAID

      120007133027

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distribution and speciation of copper and its relationship with FDOM in the East China Sea2019

    • Author(s)
      Wong Kuo Hong、Obata Hajime、Kim Taejin、Wakuta Yohei、Takeda Shigenobu
    • Journal Title

      Marine Chemistry

      Volume: 212 Pages: 96-107

    • DOI

      10.1016/j.marchem.2019.04.005

    • Related Report
      2019 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] 海洋における鉄の存在形態と微量金属元素(鉄、マンガン、ニッケル、亜鉛、カドミウム等)の動態に関する研究2017

    • Author(s)
      近藤能子(連携研究者)
    • Journal Title

      海洋化学研究

      Volume: 30 Pages: 90-97

    • Related Report
      2017 Annual Research Report
  • [Journal Article] 鉄を含めた物質循環モデルの現状と課題2017

    • Author(s)
      三角 和弘,津旨 大輔
    • Journal Title

      海の研究

      Volume: 26 Pages: 95-111

    • NAID

      130007485360

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Presentation] Effect of ocean acidification on bioavailability of iron bound to natural iron-complexing ligands2020

    • Author(s)
      S. Takeda, K. Hideshima, Y. Kondo, M. Sato
    • Organizer
      JpGU-AGU Joint Meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Distributions of natural organic Fe-binding ligands in the eastern and western subarctic North Pacific2020

    • Author(s)
      Y. Kondo, Y. Sunahara, J. Nishioka, H. Obata, S. Takeda
    • Organizer
      Ocean Sciences Meeting 2020
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of biogeochemical process on 239,240Pu distribution in an ocean general circulation model2019

    • Author(s)
      D. Tsumune, M. Aoyama, K. Hirose, T. Tsubono, K. Misumi
    • Organizer
      ENVIRA2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Numerical simulation of iron cycle in the North Pacific2019

    • Author(s)
      三角和弘, 西岡純, 小畑元, 津旨大輔, 坪野考樹, M.C. Long, K. Lindsay, J.K. Moore
    • Organizer
      日本地球惑星科学連合2019年大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] ゆっくりと沈降する粒子による陸棚堆積物からの鉄の輸送2019

    • Author(s)
      三角 和弘, 西岡 純, 小畑 元, 津旨 大輔, 坪野 考樹, Matthew C. Long, Keith Lindsay, J. Keith Moore
    • Organizer
      東京大学大気海洋研究所共同利用研究集会「GEOTRACES-Japanの現状と今後の展開」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Seasonal change in the relationship between pH and AOU in coastal waters off western Kyushu, Japan2019

    • Author(s)
      Takeda, S., K. Hideshima
    • Organizer
      ASLO 2019 Aquatic Sciences Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 北太平洋における鉄有機配位子の分布について2019

    • Author(s)
      近藤能子, 砂原雄大, 西岡純, 小畑元, 武田重信
    • Organizer
      東京大学大気海洋研究所共同利用研究集会「GEOTRACES-Japanの現状と今後の展開」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Pacific iron cycle driven by lateral export from continental-self sediments mediated by slowly sinking particles2018

    • Author(s)
      Misumi, K., J. Nishioka, H. Obata, D. Tsumune, T. Tsubono, M. C. Long, K. Lindsay, J. K. Moore
    • Organizer
      GEOTRACES Workshop - BIOGEOTRACES Japan begins -
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Pacific iron cycle driven by lateral export from continental-shelf sediments mediated by slowly sinking particles2018

    • Author(s)
      Misumi, K., J. Nishioka, H. Obata, D. Tsumune, T. Tsubono, M. C. Long, K. Lindsay, J. K. Moore
    • Organizer
      2018 Annual CESM Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] ゆっくりと沈む粒子を介した陸棚堆積物からの輸送により駆動される北太平洋の鉄循環2018

    • Author(s)
      三角 和弘, 西岡 純, 小畑 元, 津旨 大輔, 坪野 考樹, Matthew C. Long, Keith Lindsay, J. Keith Moore
    • Organizer
      東京大学大気海洋研究所共同利用研究集会「海洋生態系シンポジウム2018」
    • Related Report
      2018 Annual Research Report
  • [Presentation] ゆっくりと沈降する粒子による陸棚堆積物からの鉄の輸送2018

    • Author(s)
      三角 和弘, 西岡 純, 小畑 元, 津旨 大輔, 坪野 考樹, Matthew C. Long, Keith Lindsay, J. Keith Moore
    • Organizer
      北海道大学低温科学研究所共同利用研究集会「西部北太平洋亜寒帯域における物質循環および海洋生態系とのリンケージ」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Impact of atmospheric iron inputs on marine primary productivity and nutrient cycling2018

    • Author(s)
      三角 和弘, 津旨 大輔
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Distribution of mantle 3He in the Indian Ocean simulated by an Ocean General Circulation Model2018

    • Author(s)
      Tsumune, D., F. O. Bryan, K. Lindsay, K. Misumi, T. Tsubono, N. Takahata, H. Obata, J. Nishioka
    • Organizer
      AGU Fall Meeting 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Distribution of mantle 3He in the Indian Ocean simulated numerically by the POP2018

    • Author(s)
      Tsumune, D., F. O. Bryan, K. Lindsay, K. Misumi, T. Tsubono, N. Takahata, H. Obata, J. Nishioka
    • Organizer
      2018 Annual CESM Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Ocean acidification and iron biogeochemistry in the North Pacific2018

    • Author(s)
      Takeda, S.
    • Organizer
      GEOTRACES Workshop - BIOGEOTRACES Japan begins -
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] 北太平洋亜寒帯域における天然植物プランクトン群集への有機錯体鉄添加に対する応答の東西比較2018

    • Author(s)
      近藤能子, 西岡純, 武田重信
    • Organizer
      北海道大学低温科学研究所共同利用研究集会「寒冷圏大気ー海洋間の生物地球化学的相互作用に関する研究集会」
    • Related Report
      2018 Annual Research Report
  • [Presentation] 有明海・天草灘におけるpHとAOUの関係性の季節変化2018

    • Author(s)
      秀島滉一, 中山亮, 武田重信
    • Organizer
      日本地球惑星科学連合2018年大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 北太平洋亜寒帯域における鉄有機配位子の鉛直分布2018

    • Author(s)
      近藤能子, 西岡純, 小畑元, 武田重信
    • Organizer
      日本海洋学会2018年度秋季大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 北太平洋亜寒帯域における鉄有機配位子の鉛直分布について2018

    • Author(s)
      近藤能子, 西岡純, 小畑元, 武田重信
    • Organizer
      北海道大学低温科学研究所共同利用研究集会「西部北太平洋亜寒帯域における物質循環および海洋生態系とのリンケージ」
    • Related Report
      2018 Annual Research Report
  • [Presentation] Vertical distributions of organic Fe-binding ligands in the eastern and western subarctic North Pacific2018

    • Author(s)
      Y. Kondo, J. Nishioka, H. Obata, S. Takeda
    • Organizer
      GEOTRACES Workshop - BIOGEOTRACES Japan begins -
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Contribution of marginal sea sediment on iron cycling in the North Pacific2018

    • Author(s)
      Misumi, K., D. Tsumune, T. Tsubono, M. C. Long, K. Lindsay, J. K. Moore
    • Organizer
      AGU/ASLO/TOS 2018 Ocean Sciences Meeting
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 北西太平洋亜寒帯域植物プランクトンブルーム過程における鉄の生物利用能の変化2017

    • Author(s)
      近藤能子, 武田重信, 西岡純, 佐藤光秀, 齊藤宏明, 鈴木光次, 古谷研
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Annual Research Report
  • [Presentation] Estimation of sedimentary iron flux to the world ocean2017

    • Author(s)
      Misumi, K., D. Tsumune, T. Tsubono
    • Organizer
      JpGU-AGU Joint Meeting 2017
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 西部北太平洋の中層に分布する溶存鉄の起源2017

    • Author(s)
      三角 和弘, 津旨 大輔, 坪野 考樹
    • Organizer
      日本海洋学会2017年度秋季大会
    • Related Report
      2017 Annual Research Report

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Published: 2017-04-28   Modified: 2021-02-19  

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