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Elucidation of current status and the mechanism on changes in coastal ecosytems off Fukushima after the 2011 Tohoku earthquake and tsunami and the nuclear disaster

Research Project

Project/Area Number 18H03962
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Review Section Medium-sized Section 40:Forestry and forest products science, applied aquatic science, and related fields
Research InstitutionNational Institute for Environmental Studies

Principal Investigator

堀口 敏宏  国立研究開発法人国立環境研究所, 環境リスク・健康領域, 室長 (30260186)

Co-Investigator(Kenkyū-buntansha) 久米 元  鹿児島大学, 農水産獣医学域水産学系, 准教授 (00554263)
姜 益俊  九州大学, 共創学部, 准教授 (20503098)
遠藤 一佳  東京大学, 大学院理学系研究科(理学部), 教授 (80251411)
児玉 圭太  国立研究開発法人国立環境研究所, 環境リスク・健康研究センター, 主任研究員 (90391101)
Project Period (FY) 2018-04-01 – 2022-03-31
Project Status Completed (Fiscal Year 2021)
Budget Amount *help
¥44,200,000 (Direct Cost: ¥34,000,000、Indirect Cost: ¥10,200,000)
Fiscal Year 2021: ¥8,580,000 (Direct Cost: ¥6,600,000、Indirect Cost: ¥1,980,000)
Fiscal Year 2020: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Fiscal Year 2019: ¥11,180,000 (Direct Cost: ¥8,600,000、Indirect Cost: ¥2,580,000)
Fiscal Year 2018: ¥13,260,000 (Direct Cost: ¥10,200,000、Indirect Cost: ¥3,060,000)
Keywords潮間帯 / 無脊椎動物 / 底棲魚介類 / 東日本大震災 / 福島原発事故
Outline of Annual Research Achievements

2021年5~6月に福島県、宮城県及び茨城県の7定点で方形枠による付着生物調査を行い、種組成と種別の個体数密度及び重量密度を調べた。2021年4月に福島県浜通りの15定点でイボニシ分布状況調査を行った。イボニシ分布の空白域は2017年4月以降にほぼ消失し、個体数密度は経年的に増加傾向とみられたが、2021年に第一原発南側の大熊町夫沢で減少に転じた。産卵も2017年夏季から第一原発近傍の定点においても観察され始めたが、対照地点(茨城県平磯)と比較すると産卵面積は2021年時点でもまだ少なかった。一方、大熊町夫沢では10月初旬まで産卵が継続した。福島県大熊町夫沢と小入野、茨城県平磯で2021年4月以降、イボニシを毎月採集し、成熟状況を組織学的に評価し、生殖周期を調べた結果、大熊町夫沢の特に雌において引き続き、ほぼ周年成熟が観察された(通年成熟現象;2022年3月現在、継続中)。
2013年以降、福島県沿岸9定点で年2~3回実施された定期調査の結果、当該水域の底棲魚介類のうち、板鰓類やフグ類、二枚貝類等の一部の種を除く魚類、甲殻類、頭足類及び棘皮類の複数の種で個体数密度の減少傾向が認められた。これらの種の繁殖・再生産不全を検証する一環として、2018年10月~2019年8月に観測定点を16定点に増やした隔月の調査を実施した。個体数密度などの時空間変化、生殖腺組織検査、胃内容物解析を進めた結果、魚類代表種の食性と甲殻類代表種の性成熟に関して新知見を得た。2020年7~9月に毎月1回、福島県沿岸・沖合の27定点でエビ類等幼生調査を実施し、試料を解析した結果、クルマエビ上科の幼生密度がきわめて低いことが明らかとなった。2020年の成体密度は比較的高かったことから、これらの種の成熟・産卵・孵化・幼生発達初期段階に何らかの異常が生じている可能性が示唆された。

Research Progress Status

令和3年度が最終年度であるため、記入しない。

Strategy for Future Research Activity

令和3年度が最終年度であるため、記入しない。

Report

(4 results)
  • 2021 Annual Research Report
  • 2020 Annual Research Report
  • 2019 Annual Research Report
  • 2018 Annual Research Report

Research Products

(23 results)

All 2022 2021 2020 2019 2018 Other

All Int'l Joint Research (5 results) Journal Article (3 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 2 results) Presentation (9 results) (of which Int'l Joint Research: 4 results) Book (3 results) Remarks (3 results)

  • [Int'l Joint Research] University of Aveiro(ポルトガル)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] National Pedagogical University(ウクライナ)

    • Related Report
      2021 Annual Research Report
  • [Int'l Joint Research] University of Aveiro(ポルトガル)

    • Related Report
      2020 Annual Research Report
  • [Int'l Joint Research] Ternopil V. H. Nat'l Ped. University(ウクライナ)

    • Related Report
      2019 Annual Research Report
  • [Int'l Joint Research] University of Aveiro(ポルトガル)

    • Related Report
      2019 Annual Research Report
  • [Journal Article] What Caused Declines in Intertidal Invertebrate Populations around Fukushima Daiichi Nuclear Power Plant after the 2011 Great East Japan Earthquake, Tsunami, and Nuclear Disaster?2022

    • Author(s)
      Horiguchi Toshihiro、Kodama Keita
    • Journal Title

      Toxics

      Volume: 10 Pages: 214-214

    • DOI

      10.3390/toxics10050214

    • Related Report
      2021 Annual Research Report
    • Peer Reviewed / Open Access
  • [Journal Article] Consecutive sexual maturation observed in a rock shell population in the vicinity of the Fukushima Daiichi Nuclear Power Plant, Japan2021

    • Author(s)
      Horiguchi, T., Kawamura, K., Ohta, Y.
    • Journal Title

      Scientific Reports

      Volume: 11 Pages: 560-560

    • DOI

      10.1038/s41598-020-80686-3

    • Related Report
      2020 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Current status of the megabenthic community in coastal Fukushima Prefecture, Japan, in the wake of the Great East Japan Earthquake2018

    • Author(s)
      Kodama K、Aramaki T、Horiguchi T
    • Journal Title

      Marine Environmental Research

      Volume: 140 Pages: 358-374

    • DOI

      10.1016/j.marenvres.2018.07.005

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 福島県沿岸域の魚介類に蓄積したSr-90 の空間的な濃度分布と種差の解析2022

    • Author(s)
      近都浩之, 児玉圭太, 堀口敏宏
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Annual Research Report
  • [Presentation] 東日本大震災及び福島原発事故後の潮間帯無脊椎動物の減少要因究明に向けた取り組み2021

    • Author(s)
      堀口敏宏
    • Organizer
      新学術領域研究(研究領域提案型)『学術研究支援基盤形成』 短寿命RI供給プラットフォーム
    • Related Report
      2021 Annual Research Report
  • [Presentation] Changes in community- and population-levels of invertebrates in intertidal zones after the Fukushima nuclear disaster2020

    • Author(s)
      Horiguchi, T, Kodama, K., Kume, G., Kang, I.J., Kawamura, K., Ohta, Y.
    • Organizer
      International Conference on Radioecology and Environmental Radioactivity (ICRER) 2020
    • Related Report
      2020 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 福島県沿岸域における底棲魚介類群集構造の時空間的特性2020

    • Author(s)
      児玉圭太, 近都浩之, 荒巻能史, 堀口敏宏
    • Organizer
      令和2年度日本水産学会春季大会
    • Related Report
      2020 Annual Research Report
  • [Presentation] Consecutive sexual maturation in the rock shell, Thais clavigera collected at a site near the Fukushima Daiichi Nuclear Power Plant2019

    • Author(s)
      Horiguchi T, Kodama K, Kume G, Kang IJ, Kawamura K, Ohta Y
    • Organizer
      19th International Symposium on Toxicity Assessment
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 震災・原発事故後の福島県潮間帯生物相の経時変化2019

    • Author(s)
      堀口敏宏, 児玉圭太, 久米元, 姜益俊, 川村佳代子, 太田康彦
    • Organizer
      環境ホルモン学会第22回研究発表会
    • Related Report
      2019 Annual Research Report
  • [Presentation] What caused decline in intertidal biota after the 2011 Great East Japan Earthquake and Tsunami and the Fukushima nuclear disaster?2018

    • Author(s)
      Horiguchi T, Kodama K, Kume G, Kang IJ
    • Organizer
      RACI (The Royal Australian Chemical Institute) Radiochemistry Division Workshop
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] Delayed recovery from declines in the population densities and species richness of intertidal invertebrates near the Fukushima Daiichi Nuclear Power Plant2018

    • Author(s)
      Horiguchi T, Kodama K, Kume G, Kang IJ, Kawamura K, Ohta Y
    • Organizer
      SPERA (The South Pacific Environmental Radioactivity Association) Conference 2018
    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 東日本大震災及び原発事故後の福島県における潮間帯生物相の経時変化(第3報)2018

    • Author(s)
      堀口敏宏, 児玉圭太, 久米元, 姜益俊, 漆谷博志, 川村佳代子
    • Organizer
      第5回福島第一原発事故による周辺生物への影響に関する勉強会
    • Related Report
      2018 Annual Research Report
  • [Book] Advances in Invertebrate (Neuro)Endocrinology: A Collection of Reviews in the Post-Genomic Era Volume 1: Phyla Other Than Anthropoda2020

    • Author(s)
      Horiguchi, T., Ohta, Y. (Edited by Saber Saleuddin, Angela B. Lange, Ian Orchard)
    • Total Pages
      446
    • Publisher
      Apple Academic Press Inc.
    • ISBN
      9781771888929
    • Related Report
      2020 Annual Research Report
  • [Book] Low-Dose Radiation Effects on Animals and Ecosystems, Long-Term Study on the Fukushima Nuclear Accident2020

    • Author(s)
      Horiguchi, T., Kodama, K., Kume, G., Kang, I.J. (ed. Fukumoto, M.)
    • Total Pages
      264
    • Publisher
      Springer
    • ISBN
      9789811382185
    • Related Report
      2019 Annual Research Report
  • [Book] Advances in Invertebrate (Neuro)Endocrinology: A Collection of Reviews in the Post-Genomic Era2020

    • Author(s)
      Horiguchi, T., Ohta, Y. (eds. Saleuddin, S., Lange, A.B., Orchard, I.)
    • Total Pages
      896
    • Publisher
      Apple Academic Press
    • ISBN
      9781771888097
    • Related Report
      2019 Annual Research Report
  • [Remarks] 福島第一原子力発電所の南側約1km地点の巻貝に通年成熟現象

    • URL

      https://www.nies.go.jp/whatsnew/20210121/20210121.html

    • Related Report
      2021 Annual Research Report
  • [Remarks] イボニシを拾う男

    • URL

      https://www3.nhk.or.jp/news/special/sci_cul/2021/12/special/drhoriguchi/

    • Related Report
      2021 Annual Research Report
  • [Remarks] 報道発表:福島第一原子力発電所の南側約1km地点の巻貝に 通年成熟現象

    • URL

      https://www.nies.go.jp/whatsnew/20210121/20210121.html

    • Related Report
      2020 Annual Research Report

URL: 

Published: 2018-04-23   Modified: 2022-12-28  

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