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The effect of ocean acidification on Fe availability to phytoplankton in coastal and oceanic waters of the eastern North Pacific

Research Project

Project/Area Number 20KK0240
Research Category

Fund for the Promotion of Joint International Research (Fostering Joint International Research (B))

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 63:Environmental analyses and evaluation and related fields
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) 近藤 能子  長崎大学, 水産・環境科学総合研究科(水産), 准教授 (40722492)
堀井 幸子  国立研究開発法人水産研究・教育機構, 水産資源研究所(横浜), 研究員 (50767879)
Project Period (FY) 2020-10-27 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2022: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
Fiscal Year 2021: ¥7,410,000 (Direct Cost: ¥5,700,000、Indirect Cost: ¥1,710,000)
Fiscal Year 2020: ¥7,020,000 (Direct Cost: ¥5,400,000、Indirect Cost: ¥1,620,000)
Keywords海洋酸性化 / 植物プランクトン / 鉄 / 有機配位子 / 北太平洋 / 海洋科学 / 東部北太平洋
Outline of Research at the Start

海洋生態系を支える植物プランクトンの増殖に及ぼす海洋酸性化の影響に関して、必須微量栄養素である鉄の植物プランクトンによる利用し易さの変化が、海域によってどのように違うのかを明らかにすることを目的とする。そのため、米国研究者との国際共同研究航海により、鉄が不足している東部北太平洋の亜寒帯域、亜熱帯域、沿岸域において表層海水を用いた船上培養実験等を実施し、酸性化が植物プランクトンの鉄利用に及ぼす影響と、それに伴うプランクトン群集の応答を解析する。

Outline of Final Research Achievements

The effects of ocean acidification on phytoplankton community iron availability were investigated in the subarctic, subtropical, and coastal upwelling zones of the eastern North Pacific Ocean, where iron is a major regulator of biological production.The results of shipboard culture experiments of phytoplankton communities with varying pH and iron concentrations revealed that phytoplankton growth responses to ocean acidification differed between coastal and offshore areas of the eastern North Pacific, indicating that differences in the composition of representative iron organic ligands controlling iron chemical speciation in seawater may influence the response of phytoplankton communities to ocean acidification.

Academic Significance and Societal Importance of the Research Achievements

本研究により、有機配位子と結合した鉄のプランクトン群集による利用の変化について海域別の特徴が明らかになり、海水中に存在する主な鉄有機配位子の性質の違いが、異なる生物応答を導くという新たなメカニズムの仮説が検証された。このことから、海洋酸性化が進行したときの鉄の海洋環境中における動態と炭素循環の関係性を考える上で、各海域における鉄有機配位子の濃度分布や組成を把握することの重要性が示された。
今後は、このプロセスを海洋の生物物理モデルに組み込むことで、将来の地球温暖化・海洋酸性化による生態系および物質循環への影響予測に関する精度の向上に大きく貢献することが期待される。

Report

(4 results)
  • 2022 Annual Research Report   Final Research Report ( PDF )
  • 2021 Research-status Report
  • 2020 Research-status Report
  • Research Products

    (23 results)

All 2023 2022 2021 Other

All Int'l Joint Research (3 results) Journal Article (11 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 9 results,  Open Access: 9 results) Presentation (9 results) (of which Int'l Joint Research: 2 results)

  • [Int'l Joint Research] University of Maine/University of South Florida/Oregon State University(米国)

    • Related Report
      2022 Annual Research Report
  • [Int'l Joint Research] University of Maine/University of South Florida(米国)

    • Related Report
      2021 Research-status Report
  • [Int'l Joint Research] University of Maine(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Very strong but exchangeable organic ligand of cobalt in the marginal sea2022

    • Author(s)
      K.H. Wong, J. Xu, Y. Kondo, S. Takeda, A.S. Mashio, H. Hasegawa, H. Obata
    • Journal Title

      Limnol. Oceanogr.

      Volume: 67 Issue: 6 Pages: 1299-1312

    • DOI

      10.1002/lno.12078

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Phytoplankton Distributions in the Kuroshio-Oyashio Region of the Northwest Pacific Ocean: Implications for Marine Ecology and Carbon Cycle2022

    • Author(s)
      Wang Yaoyao、Bi Rong、Zhang Jing、Gao Jiawei、Takeda Shigenobu、Kondo Yoshiko、Chen Fajin、Jin Gui’e、Sachs Julian P.、Zhao Meixun
    • Journal Title

      Frontiers in Marine Science

      Volume: 9

    • DOI

      10.3389/fmars.2022.865142

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Subarctic pacific intermediate water: an oceanic highway for the transport of trace metals in the North Pacific2022

    • Author(s)
      K.H. Wong, H. Obata, J. Nishioka, Y. Yamashita, Y. Kondo, T. Kim, A.S. Mashio, H. Hasegawa
    • Journal Title

      Limnology and Oceanography Bulletin

      Volume: 31 Issue: 2 Pages: 31-36

    • DOI

      10.1002/lob.10490

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] East-west variabilities of N2 fixation activity in the subtropical North Pacific Ocean in summer: the field evidence of iron and phosphorus co-limitation in the western area2022

    • Author(s)
      Horii Sachiko、Takahashi Kazutaka、Shiozaki Takuhei、Takeda Shigenobu、Sato Mitsuhide、Yamaguchi Tamaha、Takino Shota、Hashihama Fuminori、Kondo Yoshiko、Takemura Toshihiko、Furuya Ken
    • Journal Title

      Authorea

      Volume: preprint

    • DOI

      10.1002/essoar.10512587.1

    • Related Report
      2022 Annual Research Report
    • Open Access
  • [Journal Article] 月例卓話・海水中の鉄など微量栄養物質が植物プランクトン増殖へ与える影響2022

    • Author(s)
      近藤 能子
    • Journal Title

      海洋化学研究

      Volume: 35 Pages: 132-136

    • Related Report
      2022 Annual Research Report
  • [Journal Article] Decadal vision in oceanography 2021: Air―sea boundary2021

    • Author(s)
      岩本洋子,相木秀則,磯口治,大林由美子,近藤文義,近藤能子,西岡純
    • Journal Title

      Oceanography in Japan

      Volume: 30 Issue: 5 Pages: 199-225

    • DOI

      10.5928/kaiyou.30.5_199

    • NAID

      130008131951

    • ISSN
      0916-8362, 2186-3105
    • Year and Date
      2021-11-15
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Decadal vision in oceanography 2021: Mid-latitude ocean2021

    • Author(s)
      橋濱史典・纐纈慎也・近藤能子・佐々木克徳・杉本周作・高橋一生・長井健容・西岡純・林田博士・平井淳也
    • Journal Title

      Oceanography in Japan

      Volume: 30 Issue: 5 Pages: 127-154

    • DOI

      10.5928/kaiyou.30.5_127

    • NAID

      130008131961

    • ISSN
      0916-8362, 2186-3105
    • Year and Date
      2021-11-15
    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] A review: iron and nutrient supply in the subarctic Pacific and its impact on phytoplankton production2021

    • Author(s)
      Nishioka J, Obata H, Hirawake T, Kondo Y, Yamashita Y, Misumi K, Yasuda I
    • Journal Title

      Journal of Oceanography

      Volume: - Issue: 4 Pages: 561-587

    • DOI

      10.1007/s10872-021-00606-5

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Feeding Ecology of Three Euphausiid Species in the North Pacific Ocean Inferred From 18S V9 Metabarcoding and Stable Isotope Analysis2021

    • Author(s)
      Zhou Fanyu、Hirai Junya、Hamasaki Koji、Horii Sachiko、Tsuda Atsushi
    • Journal Title

      Frontiers in Marine Science

      Volume: 8 Pages: 756067-756067

    • DOI

      10.3389/fmars.2021.756067

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Distinct profiles of size-fractionated iron-binding ligands between the eastern and western subarctic Pacific2021

    • Author(s)
      Kondo Yoshiko、Bamba Rise、Obata Hajime、Nishioka Jun、Takeda Shigenobu
    • Journal Title

      Scientific Reports

      Volume: 11 Issue: 1 Pages: 2053-2053

    • DOI

      10.1038/s41598-021-81536-6

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Spatial and Seasonal Variations of Stable Isotope Ratios of Particulate Organic Carbon and Nitrogen in the Surface Water of the Kuroshio2021

    • Author(s)
      Kodama Taketoshi、Nishimoto Atsushi、Horii Sachiko、Ito Daiki、Yamaguchi Tamaha、Hidaka Kiyotaka、Setou Takashi、Ono Tsuneo
    • Journal Title

      Journal of Geophysical Research: Oceans

      Volume: 126 Issue: 4 Pages: 1-20

    • DOI

      10.1029/2021jc017175

    • Related Report
      2020 Research-status Report
    • Peer Reviewed
  • [Presentation] The effect of ocean acidification on Fe speciation across distinct regions of the Eastern North Pacific2023

    • Author(s)
      Lise Artigue, Salvatore Caprara, Charles Trick, William P Cochlan, Shigenobu Takeda, Mark Wells, Kristen Buck
    • Organizer
      2023 Gordon Research Conference and Seminar on Chemical Oceanography
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Labile nickel (Ni) concentrations in the North Pacific2023

    • Author(s)
      Calyn M. Crawford, Lise Artigue, William Cochlan, Shigenobu Takeda, Charles Trick, Mark Wells, Kristen N. Buck
    • Organizer
      2023 Gordon Research Conference and Seminar on Chemical Oceanography
    • Related Report
      2022 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 北太平洋における溶存鉄の光化学反応による形態変化2023

    • Author(s)
      近藤能子, 山中紘輝, 岩田遥貴, 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「微量元素・同位体を用いた海洋生物地球化学研究 (GEOTRACES-Japan)」
    • Related Report
      2022 Annual Research Report
  • [Presentation] 西部北太平洋における鉄有機配位子動態に関する研究2022

    • Author(s)
      近藤能子, 巽智沙徳, 西岡純
    • Organizer
      北海道大学低温研究所研究集会「北方圏縁辺海の役割や北太平洋の物質循環に関するワークショップ」
    • Related Report
      2022 Annual Research Report
  • [Presentation] 北太平洋亜寒帯HNLC海域における低次生産構造の東西変化2022

    • Author(s)
      堀井幸子, 高野永美子, 高橋一生, 西岡純, 近藤能子, 武田重信
    • Organizer
      海洋生物シンポジウム2022
    • Related Report
      2021 Research-status Report
  • [Presentation] 北太平洋亜寒帯域表層の鉄の化学形態と生物利用能2021

    • Author(s)
      近藤能子, 山中紘輝, 砂原雄大, 西岡純, 小畑元, 武田重信
    • Organizer
      日本海洋学会2021年度秋季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 北太平洋亜熱帯循環域漂泳食物網における窒素・炭素安定同位体比の東西変化2021

    • Author(s)
      堀井幸子, 高橋一生, 福島慶太郎, 大西雄二, 木庭啓介, 古谷研
    • Organizer
      2021年度水産海洋学会研究発表大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 北太平洋亜寒帯HNLC海域におけるサイズ分画鉄有機配位子分布の東西比較2021

    • Author(s)
      近藤能子, 馬場梨世, 小畑元, 西岡純, 武田重信
    • Organizer
      GEOTRACES-Japanシンポジウム
    • Related Report
      2020 Research-status Report
  • [Presentation] 沿岸海水中の蛍光性溶存有機物に対する銅の消光作用と錯形成能の評価2021

    • Author(s)
      江頭舞鈴, 武田重信
    • Organizer
      GEOTRACES-Japanシンポジウム
    • Related Report
      2020 Research-status Report

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Published: 2020-10-29   Modified: 2024-01-30  

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