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Study on influences of radiocesium redistribution on forest ecosystems

Research Project

Project/Area Number 16H04934
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section一般
Research Field Forest science
Research InstitutionKyoto University

Principal Investigator

Ohte Nobuhito  京都大学, 情報学研究科, 教授 (10233199)

Co-Investigator(Kenkyū-buntansha) 大橋 瑞江  兵庫県立大学, 環境人間学部, 教授 (30453153)
村上 正志  千葉大学, 大学院理学研究院, 教授 (50312400)
二瓶 直登  東京大学, 大学院農学生命科学研究科(農学部), 特任准教授 (50504065)
小田 智基  東京大学, 大学院農学生命科学研究科(農学部), 助教 (70724855)
Project Period (FY) 2016-04-01 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥16,120,000 (Direct Cost: ¥12,400,000、Indirect Cost: ¥3,720,000)
Fiscal Year 2019: ¥3,250,000 (Direct Cost: ¥2,500,000、Indirect Cost: ¥750,000)
Fiscal Year 2018: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2017: ¥2,990,000 (Direct Cost: ¥2,300,000、Indirect Cost: ¥690,000)
Fiscal Year 2016: ¥6,890,000 (Direct Cost: ¥5,300,000、Indirect Cost: ¥1,590,000)
Keywords福島 / 放射性セシウム / 再分配 / 森林生態系 / 内部循環 / 物質循環 / 食物網 / 浮遊粒子状物質 / 貯水池堆積物 / 大規模降雨イベント
Outline of Final Research Achievements

1. Radioactive cesium ( Cs) The amount of movement was observed. In addition to this, a radiation dose survey of shore deposits and measurement of radioactive Cs concentration were carried out along the Kamioguni River downstream from the forest site.
2. We investigated the 137Cs concentration by depth of the pond bottom, the amount of sediment, and the dissolved / suspended 137Cs concentration of the pond water in the reservoir where the runoff water and sediment from the forest downstream of the above survey site flowed. In addition, the 137Cs balance in the reservoir was clarified by comparing with the observed data of 137Cs runoff in the mountain stream upstream of the reservoir. As a result, it was suggested that the effect of trapping 137Cs in the reservoir was not great, although it varied depending on the characteristics of the catchment area. The dissolved / suspended 137Cs concentration in the pond water was as low as that of the current stream water in normal times.

Academic Significance and Societal Importance of the Research Achievements

本研究によって、森林における放射性Csの保持メカニズムの詳細が明らかになった。特に、植物-土壌間で生じている養分の内部循環と同じメカニズムで、放射性Csが動的に保持されていることと、林床におけるリターの分解過程がこのプロセスを支えていることが示された。これらの知見は、抜本的な森林除染が行われない森林の管理において、被爆リスクを下げるための施業を考える上で基礎的な情報となる。また、放射性Csの生物間分散の調査結果から、生物濃縮が生じていないことが確かめられたが、一方で、栄養段階の低い生物種のレベルは、この4年間で顕著な低下はみられず、林床の除染の必要性に関しては再考が必要であると考えられた。

Report

(5 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Annual Research Report
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (36 results)

All 2020 2019 2018 2017 2016 Other

All Int'l Joint Research (4 results) Journal Article (7 results) (of which Peer Reviewed: 6 results,  Open Access: 4 results) Presentation (22 results) (of which Int'l Joint Research: 9 results,  Invited: 8 results) Book (1 results) Remarks (2 results)

  • [Int'l Joint Research] University of Eastern Finland(フィンランド)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Eastern Finland(フィンランド)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] University of Eastern Finland(Finland)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] Texas A & M University(米国)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] The Spatial Distribution of Radiocesium Over a Four-Year Period in a Forest Ecosystem in North Fukushima After the Nuclear Power Station Accident2019

    • Author(s)
      Murakami Masashi、Miyata Takahiro、Kobayashi Natsuko、Tanoi Keitaro、Ishii Nobuyoshi、Ohte Nobuhito
    • Journal Title

      Agricultural Implications of the Fukushima Nuclear Accident (III)

      Volume: III Pages: 141-152

    • DOI

      10.1007/978-981-13-3218-0_13

    • ISBN
      9789811332173, 9789811332180
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Absorption of Radioceasium in Soybean2019

    • Author(s)
      Nihei Naoto、Hamamoto Shoichiro
    • Journal Title

      Agricultural Implications of the Fukushima Nuclear Accident (III)

      Volume: III Pages: 27-33

    • DOI

      10.1007/978-981-13-3218-0_4

    • ISBN
      9789811332173, 9789811332180
    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Radiocesium Accumulation in Koshiabura (Eleutherococcus sciadophylloides) and Other Wild Vegetables in Fukushima Prefecture2019

    • Author(s)
      Nihei Naoto、Nemoto Keisuke
    • Journal Title

      Agricultural Implications of the Fukushima Nuclear Accident (III)

      Volume: III Pages: 77-83

    • DOI

      10.1007/978-981-13-3218-0_8

    • ISBN
      9789811332173, 9789811332180
    • Related Report
      2018 Annual Research Report
  • [Journal Article] Effects of litter feeders on the transfer of 137Cs to plants2018

    • Author(s)
      Ishii Nobuyoshi、Murakami Masashi、Suzuki Takahiro、Tagami Keiko、Uchida Shigeo、Ohte Nobuhito
    • Journal Title

      Scientific Reports

      Volume: 8 Issue: 1 Pages: 6691-6691

    • DOI

      10.1038/s41598-018-25105-4

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Studying 137Cs dynamics during litter decomposition in three forest types in the vicinity of Fukushima Dai-ichi Nuclear Power Plant2018

    • Author(s)
      Izuki Endo, Mizue Ohashi, Keitaro Tanoi, Natsuko I. Kobayashi, Atsushi Hirose, Nobuhito Ohte
    • Journal Title

      Journal of Forest Research

      Volume: 23 Issue: 2 Pages: 85-90

    • DOI

      10.1080/13416979.2018.1460189

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Effects of litter feeders on the transfer of 137Cs to plants2018

    • Author(s)
      Nobuyoshi Ishii, Masashi Murakami, Takahiro Suzuki, Keiko Tagami, Shigeo Uchida, and Nobuhito Ohte
    • Journal Title

      Scientific Reports

      Volume: in processing

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] 福島の森林生態系における放射性セシウムの動態2016

    • Author(s)
      大手信人
    • Journal Title

      日本原子力学会誌「アトモス」

      Volume: 58 Pages: 589-593

    • NAID

      130007799982

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] フィンランド北方林における根系研究の発展2020

    • Author(s)
      大橋瑞江
    • Organizer
      第131回 日本森林学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 森林流域からの放射性Cs流出機構に関する研究2020

    • Author(s)
      川井拓哉, 大手信人, 二瓶直登, 小田智基, 和田敏裕.
    • Organizer
      第131回 日本森林学会大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Radiocesium contamination of agricultural products by secondary fallout matter2019

    • Author(s)
      Nihei, N., Yoshimura, K. and Nakanishi, T.M.
    • Organizer
      5th International Conference on Environmental Radioactivity: Variations of environmental radionuclides
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 浮遊物による農作物への影響2019

    • Author(s)
      二瓶直登
    • Organizer
      第15回放射能の農畜水産物等への影響についての研究報告会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 大気浮遊物中の放射性セシウムの農作物への影響2019

    • Author(s)
      二瓶直登
    • Organizer
      第9回 東日本大震災以降の福島県の現状及び支援の取り組みについて
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 福島県の森林における放射性セシウムの流出機構に関する研究2019

    • Author(s)
      川井拓哉, 大手信人, 二瓶直登, 小田智基, 和田敏裕
    • Organizer
      第9回東日本大震災以降の福島県の現状及び支援の取り組みについて
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 原子力災害による森林汚染と地域再生:森林生態学から復興知を考える2019

    • Author(s)
      大手信人
    • Organizer
      環境経済・政策学会2019年大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 森林流域からの放射性Cs流出機構の研究:SSの流出と役割について2019

    • Author(s)
      川井拓哉・大手信人・小田智基・二瓶直登・和田敏裕
    • Organizer
      第130回日本森林学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] 福島の小流域における森林の枝葉に含まれる放射性セシウムの動態2019

    • Author(s)
      大橋瑞江・遠藤いず貴・田野井慶太朗・廣瀬農・小田智基・村上正志・小林奈通子・大手信人
    • Organizer
      第130回日本森林学会大会
    • Related Report
      2018 Annual Research Report
  • [Presentation] Radioactive contamination in forested area in Fukushima after the nuclear power station accident in march 2011: Influences of the policy decision not to decontaminate forests on restarting of agriculture and life2018

    • Author(s)
      Nobuhito Ohte, Tomoki Oda and Naoto Nihei
    • Organizer
      American Geophysical Union, 2018 Fall Meeting
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福島復興のこれから:福島から日本の地域社会の持続可能な「かたち」を考える2018

    • Author(s)
      大手信人
    • Organizer
      第7回原子力政策・福島復興シンポジウム「東日本大震災と福島原発事故から7 年 ~原子力バックエンド問題と福島復興の今後のあり方を考える~」
    • Related Report
      2017 Annual Research Report
    • Invited
  • [Presentation] 福島の森林生態系における137Csの動態:土壌中の空間的不均一 性について2018

    • Author(s)
      佐野みずほ・大橋瑞江・田野井慶太郎・二瓶直登・小田智基・大手信人
    • Organizer
      第129回日本森林学会大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 森林斜面におけるリター移動に伴う放射性セシウムの空間分布変動2018

    • Author(s)
      小田智基・堀田紀文・大手信人・田野井慶太朗
    • Organizer
      第129回日本森林学会大会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 137Cs distributions and extraction in soils and roots in forest ecosystem: Comparison study between southern Finland and Fukushima, Japan2017

    • Author(s)
      Osamu hashimoto, Jukka Pumpanen, Nobuhito Ohte, Naoto Nihei, Keitaro Tanoi, Izuki Endo, Mizue Ohashi
    • Organizer
      Japan-Finland Joint Seminar on Biogeochemical Cycles of Forest Ecosystems: Toward Sustainable Forest Management
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 137-Cesium dynamics along the canopy-forest floor continuum in a forest of the northern Fukushima2017

    • Author(s)
      Izuki Endo, Mizue Ohashi, Keitaro Tanoi, Natsuko I. Kobayashi, Atsushi Hirose, Nobuhito Ohte
    • Organizer
      Japan-Finland Joint Seminar on Biogeochemical Cycles of Forest Ecosystems: Toward Sustainable Forest Management
    • Related Report
      2017 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福島の森林生態系内の放射性物質2017

    • Author(s)
      大手信人
    • Organizer
      第6 回原子力政策・福島復興シンポジウム『東日本大震災と福島原発事故から6 年~原子力政策と福島復興の今後のあり方を考える~』
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] 福島の森林生態系における放射性セシウムの動態 : 蓄積と移動の空間的不均一性について2017

    • Author(s)
      佐野みずほ, 大橋瑞江, 田野井慶太郎, 二瓶直人, 大手信人
    • Organizer
      第128回日本森林学会大会
    • Related Report
      2016 Annual Research Report
  • [Presentation] Ecosystem monitoring on 137Cs redistribution dynamics on the forested area in Fukushima after the nuclear power plant in 20112016

    • Author(s)
      Nobuhito Ohte, Masashi Murakami, Mizue Ohashi, Izuki Endo, Shotaro Yamabe, Tomoki Oda, Keitaro Tanoi, Nobuyoshi Ishii
    • Organizer
      ABE Initiative/JICA-JDS Program Seminar, Graduate School of Asia-Pacific Studies, Waseda University at Kyoto University
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] Ecosystem monitoring of radiocesium redistribution dynamics in a forested catchment in Fukushima after the nuclear power station accident in March 20112016

    • Author(s)
      Nobuhito Ohte, Izuki Endo, Mizue Ohashi, Masashi Murakami, Tomoki Oda, Norifumi Hotta, Ryohei Yamanishi, Yuko Sugiyama, Keitaro Tanoi, Natsuko I Kobayashi and Nobuyoshi Ishii
    • Organizer
      American Geophysical Union, Fall Meeting 2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Effect of Sediment Trap by Check Dam on 137Cs Transport from Forest Catchment to Downstream2016

    • Author(s)
      Oda T, Yamabe S, Ohte N, Hotta N, Endo I, Hashimoto O & Tanoi K
    • Organizer
      Goldschmidt 2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Radiocesium Redistribution Dynamics in a Forested Ecosystem in Fukushima after the Nuclear Power Plant Accident in March 20112016

    • Author(s)
      Ohte N, Murakami M, Endo I, Ohashi M, Oda T, Hotta N, Tanoi K, Kobayashi N & Ishii N
    • Organizer
      Goldschmidt 2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Role of Natural Organic Matter on Iodine and Pu Distribution and Mobility in Environmental Samples from the Northwestern Fukushima Prefecture2016

    • Author(s)
      Xu C, Zhang S, Sugiyama Y, Ohte N, Ho Y-F, Fujitake N, Kaplan D, Yeager C, Schwehr K & Santschi P
    • Organizer
      Goldschmidt 2016
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Book] 森林と物質循環(柴田英昭編)2018

    • Author(s)
      柴田 英昭・大手 信人
    • Total Pages
      218
    • Publisher
      共立出版
    • ISBN
      9784320058248
    • Related Report
      2017 Annual Research Report
  • [Remarks] 原発事故後の福島県北部の森林生態系における放射性セシウムの分布に関するモニタリング

    • URL

      http://bre.soc.i.kyoto-u.ac.jp/~nobu/saito/fu_daono_sen_lindein_Japanese%29.html

    • Related Report
      2019 Annual Research Report
  • [Remarks] ECOSYSTEM MONITORING OF RADIOCESIUM REDISTRIBUTION

    • URL

      http://bre.soc.i.kyoto-u.ac.jp/~nobu/saito/At_Fukushima.html

    • Related Report
      2019 Annual Research Report

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Published: 2016-04-21   Modified: 2022-02-21  

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