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Effect of radiocesium on physiology of stream aquatic insects

Research Project

Project/Area Number 17K00655
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Research Field Environmental and ecological symbiosis
Research InstitutionForest Research and Management Organization

Principal Investigator

Mayumi Yoshimura  国立研究開発法人森林研究・整備機構, 森林総合研究所, チーム長 (40353916)

Project Period (FY) 2017-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥4,810,000 (Direct Cost: ¥3,700,000、Indirect Cost: ¥1,110,000)
Fiscal Year 2019: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2018: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2017: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Keywords生態学的半減期 / 水生昆虫・魚 / 放射性セシウム / 渓流・河川 / 汚染 / 空間線量率 / 塩類細胞 / 福島 / 魚 / 水生昆虫 / セシウム / 渓流 / 半減期 / 排出機能 / 河川 / 放射能汚染 / 水生生物 / 洪水 / 生理反応
Outline of Final Research Achievements


Concentrations of radiocesium of litter, algae, sand, and aquatic insects that exist in the outflow river from the lake (low air dose rate) were higher than those in the inflow river into lake (high air dose rate) and the neighboring rivers (high air dose rate). In the rivers flowing down from the lake (low air dose rate), the concentration of radiocesium was increased in sand and some aquatic insects.
The lower the air dose rate, the longer the ecological half-life of radiocesium and the higher the transfer coefficient from algae to aquatic insects. In addition, the ecological half-life differed depending on the taxon, and the ecological half-life was long for the species of aquatic insects that prefer sandy habitats (borrower).

Academic Significance and Societal Importance of the Research Achievements

空間線量率の低い場所では、様々な環境変動の影響が相対的に大きくなるため、放射性セシウムの量が単純に減少しないのであろう。また、流域内の汚染された砂・落葉等が継続的に渓流にもたらされる結果、渓流内の放射性セシウム濃度が下がらず、生態系から排泄されにくくなっていると考えられる。これらの成果は淡水生物の放射能汚染対策に利用できる。しかし、渓流生態系における放射性セシウム汚染の動態の一端を明らかにしただけで、放射性セシウムが渓流内のどこにどれだけ留まっているのかなど未解明の部分が多い。

Report

(6 results)
  • 2021 Annual Research Report   Final Research Report ( PDF )
  • 2020 Research-status Report
  • 2019 Research-status Report
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (9 results)

All 2021 2020 2019 2018 2017

All Journal Article (3 results) (of which Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (6 results) (of which Int'l Joint Research: 1 results)

  • [Journal Article] Relationships Between Stomach Contents and Radiocesium Contamination of Fish by Fukushima Radioactive Accident in 2011, in Japan2021

    • Author(s)
      Mayumi Yoshimura, Akio Akama
    • Journal Title

      Impacts of Fukushima Nuclear Accident on Freshwater Environments、S. Nagao (ed.)、Chapter 12

      Volume: - Pages: 185-196

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Difference of ecological half-life and transfer coefficient in aquatic invertebrates between high and low radiocesium contaminated streams2020

    • Author(s)
      Yoshimura M and Akama A
    • Journal Title

      Scientific Reports

      Volume: 10 Issue: 1 Pages: 21819-21819

    • DOI

      10.1038/s41598-020-78844-8

    • Related Report
      2020 Research-status Report
    • Peer Reviewed / Open Access
  • [Journal Article] Elevated radioactive contamination from the Fukushima nuclear power plant accident in aquatic biota from a river with a lake in its upper reaches2018

    • Author(s)
      YOSHIMURA Mayumi、AKAMA Akio
    • Journal Title

      Canadian Journal of Fisheries and Aquatic Sciences

      Volume: 75 Issue: 4 Pages: 609-620

    • DOI

      10.1139/cjfas-2016-0333

    • Related Report
      2017 Research-status Report
    • Peer Reviewed
  • [Presentation] 福島県の渓流における水生生物の放射性セシウムによる汚染状態の推移2020

    • Author(s)
      吉村真由美、赤間亮夫
    • Organizer
      日本生態学会大会講演要旨集
    • Related Report
      2019 Research-status Report
  • [Presentation] 福島第一原発事故により汚染された水生生物における放射性セシウム濃度の推移2019

    • Author(s)
      吉村真由美、赤間亮夫
    • Organizer
      日本陸水学会大会講演要旨集
    • Related Report
      2019 Research-status Report
  • [Presentation] Change of radioactive Cs concentration in freshwater biota impacted by the Fukushima nuclear power plant accident2019

    • Author(s)
      Mayumi Yoshimura
    • Organizer
      Abstract book of ASLO (The Association for the Sciences of Limnology and Oceanography) Aquatic Sciences Meeting
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 福島第一原発事故による水生生物への放射能汚染について2019

    • Author(s)
      吉村真由美
    • Organizer
      日本生態学会第66回大会
    • Related Report
      2018 Research-status Report
  • [Presentation] 放射性セシウムの水生生物への影響2017

    • Author(s)
      吉村真由美、赤間亮夫
    • Organizer
      日本動物学会第88回富山大会
    • Related Report
      2017 Research-status Report
  • [Presentation] 福島第一原発(FDNPP)事故による放射性セシウム放出の水生生物への影響2017

    • Author(s)
      吉村真由美、赤間亮夫
    • Organizer
      日本陸水学会第82回大会
    • Related Report
      2017 Research-status Report

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Published: 2017-04-28   Modified: 2023-01-30  

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