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A novel tool for the trophic level of bioessential metals by non-traditioanal stable isotopes

Research Project

Project/Area Number 19K21908
Research Category

Grant-in-Aid for Challenging Research (Exploratory)

Allocation TypeMulti-year Fund
Review Section Medium-sized Section 17:Earth and planetary science and related fields
Research InstitutionJapan Agency for Marine-Earth Science and Technology

Principal Investigator

Yoshimura Toshihiro  国立研究開発法人海洋研究開発機構, 海洋機能利用部門(生物地球化学プログラム), 研究員 (90710070)

Co-Investigator(Kenkyū-buntansha) 日下 宗一郎  東海大学, 海洋学部, 特任講師 (70721330)
石川 尚人  国立研究開発法人海洋研究開発機構, 海洋機能利用部門(生物地球化学プログラム), 副主任研究員 (80609389)
Project Period (FY) 2019-06-28 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥6,500,000 (Direct Cost: ¥5,000,000、Indirect Cost: ¥1,500,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Keywordsマグネシウム / 安定同位体 / 栄養段階 / 必須ミネラル / 同位体 / 食物網解析 / 安定同位体比 / 食物連鎖 / 食性解析 / 金属
Outline of Research at the Start

生物の生体必須常量元素は一般に必須ミネラルと呼ばれる。必須ミネラルは細胞の浸透圧,膜電位の調節・維持・決定をはじめ多様な生化学プロセスを駆動する。本研究では動植物に含まれる主要な必須ミネラル(Mg,Ca,K,Cl)に着目し,食物連鎖に伴う各種元素の安定同位体比の変化を検証し,必須ミネラルの食性解析ツールの新規確立を目指す。

Outline of Final Research Achievements

Of the major bioessential metals in marine organism samples, this study focuses on magnesium, which has stable isotopes, to clarify changes in stable isotope ratios in different organs of individual specimen and through the food chain, and to eat habits. It was evaluated as an analysis tool. The bulk and organ-separated analysis of natural marine organism samples and differences in magnesium isotope ratios between tuna samples and feeds cultivated from juveniles and microbial culture samples and media were examined. Each fish organ shows a unique value, and all have lower values than seawater. Tuna muscle has a difference of about -0.4‰ between the compound feed, methane bacteria, and the medium. Therefore it is possible that Mg isotope offsets between redator-prey relationships can be widely applied to marine ecosystems as a change associated with the food chain.

Academic Significance and Societal Importance of the Research Achievements

同位体比を用いた精密食物網解析は,有機物に特化した食物網の解析ツールとして産地の同定や,自然界の捕食・被食関係を知るための化学ツールとして発展してきた。他方で,生体内の元素の元素の挙動は各論的に扱う必要があるが,金属元素の細胞レベルの動態解析には必ずしも自然界の解析に有用な手法が存在していない。また,マグネシウムなどの二族元素は骨や歯などの生体硬組織に多く存在するため,時間を遡った考古資料の解析にも応用できる。同位体比が元素移動の指標になればマイクログラム以下のMg量で利用可能な,元素解析の新規ツールとして期待できる。

Report

(4 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • Research Products

    (11 results)

All 2022 2021 2020 2019 Other

All Int'l Joint Research (2 results) Journal Article (5 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 5 results,  Open Access: 3 results) Presentation (4 results)

  • [Int'l Joint Research] ジャショーレ科学技術大学(バングラデシュ)

    • Related Report
      2020 Research-status Report
  • [Int'l Joint Research] ノースカロライナ大学チャペルヒル校(米国)

    • Related Report
      2020 Research-status Report
  • [Journal Article] Potassium incorporation and isotope fractionation in cultured scleractinian corals2022

    • Author(s)
      Li Wenshuai、Liu Xiao-Ming、Wang Kun、Hu Yongfeng、Suzuki Atsushi、Yoshimura Toshihiro
    • Journal Title

      Earth and Planetary Science Letters

      Volume: 581 Pages: 117393-117393

    • DOI

      10.1016/j.epsl.2022.117393

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] The Influence of Weathering, Water Sources, and Hydrological Cycles on Lithium Isotopic Compositions in River Water and Groundwater of the Ganges?Brahmaputra?Meghna River System in Bangladesh2021

    • Author(s)
      Yoshimura Toshihiro、Araoka Daisuke、Kawahata Hodaka、Hossain H. M. Zakir、Ohkouchi Naohiko
    • Journal Title

      Frontiers in Earth Science

      Volume: 9 Pages: 668757-668757

    • DOI

      10.3389/feart.2021.668757

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Stable strontium isotopic compositions of river water, groundwater, and sediments from the Ganges, Brahmaputra and Meghna river system in Bangladesh2021

    • Author(s)
      Yoshimura, T., Wakaki, S., Kawahata, H., Hossain, Z., Manaka, T., Suzuki, A., Ishikawa, T. and Ohkouchi, N.
    • Journal Title

      Frontiers in Earth Science,

      Volume: 9 Pages: 1-17

    • DOI

      10.3389/feart.2021.592062

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Magnesium Isotope Fractionation during Synthesis of Chlorophyll a and Bacteriochlorophyll a of Benthic Phototrophs in Hypersaline Environments2019

    • Author(s)
      Isaji Yuta、Yoshimura Toshihiro、Araoka Daisuke、Kuroda Junichiro、Ogawa Nanako O.、Kawahata Hodaka、Ohkouchi Naohiko
    • Journal Title

      ACS Earth and Space Chemistry

      Volume: 3 Issue: 6 Pages: 1073-1079

    • DOI

      10.1021/acsearthspacechem.9b00013

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Magnesium isotopic composition of tests of large benthic foraminifers: implications for biomineralization2019

    • Author(s)
      Maeda, A., Yoshimura, T., Araoka, D., Suzuki, A., Tamenori, Y., Fujita, K., Toyofuku, T., Ohkouchi, N., Kawahata, H.
    • Journal Title

      Geochemistry, Geophysics, Geosystems

      Volume: 20 Issue: 8 Pages: 4046-4058

    • DOI

      10.1029/2019gc008314

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Open Access
  • [Presentation] 温度制御下で飼育したサンゴ骨格中のストロンチウム安定同位体組成2021

    • Author(s)
      吉村 寿紘、若木 重行、鈴木 淳、石川 剛志、大河内 直彦
    • Organizer
      日本地球化学会年会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 温度制御下で飼育した塊状サンゴPoritesの骨格におけるLi同位体分別2020

    • Author(s)
      吉村 寿紘、Li Wenshuai、鈴木 淳、Liu Xiao-Ming
    • Organizer
      第6回地球環境史学会年会
    • Related Report
      2020 Research-status Report
  • [Presentation] 縄文時代晩期の愛知県稲荷山貝塚より出土した人骨の歯資料における軽元素の微小領域分布と化学形態2019

    • Author(s)
      吉村 寿紘・日下 宗一郎・為則 雄祐・荒岡 大輔・川幡 穂高・大河内 直彦
    • Organizer
      日本地球化学会年会
    • Related Report
      2019 Research-status Report
  • [Presentation] 食物連鎖に伴う必須金属の動態解析と化石・考古生態への応用に向けた魚類の器官におけるマグネシウム同位体比の差異と栄養段階指標の評価2019

    • Author(s)
      吉村 寿紘・石川 尚人・小川 奈々子・日下 宗一郎・若木 重行・石川 剛志・力石 嘉人・大河内 直彦
    • Organizer
      地球環境史学会年会
    • Related Report
      2019 Research-status Report

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Published: 2019-07-04   Modified: 2023-01-30  

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