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Verification and quantification of export of organic carbon from coastal vegetated ecosystems to outer ocean and subsequent long-term sequestration

Research Project

Project/Area Number 18H03354
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Review Section Basic Section 63010:Environmental dynamic analysis-related
Research InstitutionThe University of Tokyo

Principal Investigator

Miyajima Toshihiro  東京大学, 大気海洋研究所, 助教 (20311631)

Co-Investigator(Kenkyū-buntansha) 中村 隆志  東京工業大学, 環境・社会理工学院, 准教授 (20513641)
堀 正和  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), グループ長 (50443370)
浜口 昌巳  国立研究開発法人水産研究・教育機構, 水産技術研究所(廿日市), 主幹研究員 (60371960)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥16,900,000 (Direct Cost: ¥13,000,000、Indirect Cost: ¥3,900,000)
Fiscal Year 2021: ¥1,820,000 (Direct Cost: ¥1,400,000、Indirect Cost: ¥420,000)
Fiscal Year 2020: ¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2019: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2018: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Keywords炭素循環 / 沿岸浅海域生態系 / 有機炭素隔離 / 環境DNA / 生態系モデル / 植生復元 / ブルーカーボン / 沿岸湿地生態系 / 炭素隔離 / 海草藻場 / マングローブ / 比表面積
Outline of Final Research Achievements

Toward comprehensive evaluation of the long-term organic carbon (OC) sequestration by coastal vegetated habitats such as seagrass beds and mangroves, we developed a molecular-based technique to quantitatively evaluate the amount of OC exported from the habitats to the open ocean and sequestered in offshore sediment. We developed a real-time PCR technique for detecting DNAs from specific plant species to establish a method for rigorous quantification, and also attempted to convert DNA concentrations in sediments to OC concentrations derived from the same plant species. This method was then applied to several real offshore sediment samples, and used in conjunction with a model to estimate the sedimentation rate in the same zone, to finally enable estimation of the rate of sequestration of specific plant-derived OC into the sediment. The efficiency of the method was demonstrated through the case study conducted for offshore sediments around Okinawa Trough.

Academic Significance and Societal Importance of the Research Achievements

有力な二酸化炭素吸収源として注目されているブルーカーボン生態系から有機炭素が外洋域に移出されて外洋堆積物中に長期貯留されていることを実証し、その年間貯留速度を定量化する方法を世界に先駆けて確立した。外洋域への炭素貯留を評価することはブルーカーボンの吸収源機能を包括的に評価するために不可欠であり、これまでもいくつかの仮定のもとにその平均的な規模の推算がなされているが、具体的な沿岸植生植物に由来する有機炭素が外洋域に貯留されていることを実証してその速度まで含めて直接的に解明した事例はこれまでになく、本研究の成果は上記のような仮定に対する最初のエビデンスとして高い意義を有する。

Report

(5 results)
  • 2022 Final Research Report ( PDF )
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report
  • Research Products

    (16 results)

All 2023 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (3 results) Journal Article (5 results) (of which Peer Reviewed: 4 results,  Open Access: 3 results) Presentation (7 results) Remarks (1 results)

  • [Int'l Joint Research] University of the Philippines Diliman/Aklan State University(フィリピン)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of the Philippines/Aklan State University(フィリピン)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] Ifremer/UMR Marbec(フランス)

    • Related Report
      2018 Annual Research Report
  • [Journal Article] Development of Quantitative Real-Time PCR for Detecting Environmental DNA Derived from Marine Macrophytes and Its Application to a Field Survey in Hiroshima Bay, Japan2022

    • Author(s)
      Hamaguchi Masami、Miyajima Toshihiro、Shimabukuro Hiromori、Hori Masakazu
    • Journal Title

      Water

      Volume: 14 Issue: 5 Pages: 827-827

    • DOI

      10.3390/w14050827

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Export and dispersal of coastal macrophyte-derived organic matter to deep offshore sediment around the Tokara and Yaeyama Islands, southwest Japan: Evaluation using quantitative DNA probing techniques2022

    • Author(s)
      Miyajima T, Hamaguchi M, Nakamura T, Katayama H, Hori M
    • Journal Title

      Bulletin of the Geological Survey of Japan

      Volume: 73 Pages: 313-322

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Evaluation of the baseline carbon sequestration rates of <scp>Indo‐Pacific</scp> temperate and tropical seagrass meadow sediments2021

    • Author(s)
      Miyajima Toshihiro、Hamaguchi Masami、Hori Masakazu
    • Journal Title

      Ecological Research

      Volume: 37 Issue: 1 Pages: 9-20

    • DOI

      10.1111/1440-1703.12263

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 海洋における有機炭素の長期貯留のメカニズム (特集 ブルーカーボン)2021

    • Author(s)
      宮島利宏
    • Journal Title

      化学工学

      Volume: 85 Pages: 670-673

    • NAID

      40022763083

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Carbon Sequestration in Sediment as an Ecosystem Function of Seagrass Meadows2018

    • Author(s)
      Miyajima Toshihiro、Hamaguchi Masami
    • Journal Title

      Blue Carbon in Shallow Coastal Ecosystems

      Volume: - Pages: 33-71

    • DOI

      10.1007/978-981-13-1295-3_2

    • ISBN
      9789811312946, 9789811312953
    • Related Report
      2018 Annual Research Report
  • [Presentation] Towards quantitative evaluation of "blue carbon" sequestration in pelagic ocean sediment2023

    • Author(s)
      Miyajima T, Hor M, Hamaguchi M
    • Organizer
      Japan Geophysical Union Annual Meeting 2023
    • Related Report
      2021 Annual Research Report
  • [Presentation] Detecting mangrove- and seagrass-derived eDNA from deep-sea sediment around Yaeyama Island: Implication for offshore blue carbon sequestration2021

    • Author(s)
      Miyajima T, Hamaguchi M, Nakamura T, Katayama H, Hori M
    • Organizer
      Japan Geophysical Union Annual Meeting 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Two-way nested blue carbon tracing simulation for elucidating fate of effused organic carbon from coastal ecosystems2021

    • Author(s)
      Nakamura T, Amri F, Bernardo LPC, Nadaoka K, Hori M, Hamaguch M, Miyajima T
    • Organizer
      Japan Geophysical Union Annual Meeting 2021
    • Related Report
      2021 Annual Research Report
  • [Presentation] Evaluation of carbon export from blue carbon ecosystems and allochthonous sequestration using eDNA techniques2020

    • Author(s)
      Toshihiro Miyajima, Masami Hamaguchi, Masakazu Hori, Jeffrey Munar, Jesus Abad, Naoko Morimoto, Maria Lourdes San Diego-McGlone
    • Organizer
      2020年度日本地球惑星科学連合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Spatial and seasonal variation in water quality in Batan Bay, Philippines2020

    • Author(s)
      Toshihiro Miyajima, Ryan Basina, Charissa M. Ferrera, Naoko Morimoto, Yasmin H. Primavera Tirol, Maria Lourdes San Diego-McGlone, Masami Hamaguchi
    • Organizer
      2020年度日本地球惑星科学連合大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] 海草藻場を伴う浅海炭酸塩堆積物の有機炭素の存在形態2019

    • Author(s)
      宮島利宏
    • Organizer
      日本地球惑星科学連合2019年度大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] マングローブ二次林堆積物における有機炭素の残留と集積に対する地形的要因の効果2019

    • Author(s)
      宮島利宏、諏訪錬平、K.L. Bejasa、R. Rollon、M.L. San Diego-McGlone、C. Jaraula、F. Siringan、小野賢二、Y. Primavera Tirol、宮入陽介、横山祐輔
    • Organizer
      日本地球惑星科学連合2019年度大会
    • Related Report
      2019 Annual Research Report
  • [Remarks] 海洋における有機炭素の長期貯留のメカニズム

    • URL

      https://co.aori.u-tokyo.ac.jp/sc/long_term_oc_sequestration_in_the_ocean

    • Related Report
      2021 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2024-01-30  

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