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Effects of changes in seaweed bed vegetation associated with ocean warming on fish and fisheries

Research Project

Project/Area Number 19K06209
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section一般
Review Section Basic Section 40030:Aquatic bioproduction science-related
Research InstitutionKochi University

Principal Investigator

Nakamura Yohei  高知大学, 教育研究部総合科学系黒潮圏科学部門, 教授 (60530483)

Project Period (FY) 2019-04-01 – 2023-03-31
Project Status Completed (Fiscal Year 2022)
Budget Amount *help
¥3,640,000 (Direct Cost: ¥2,800,000、Indirect Cost: ¥840,000)
Fiscal Year 2021: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2020: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Keywords藻場 / 魚類 / 温暖化 / 魚類群集 / 地球温暖化
Outline of Research at the Start

西日本では,温暖化の影響を受けて1990年代以降に在来の温帯性海藻の消失や南方系海藻の定着が顕在化している。本研究では,藻場の消失や海藻構成種の変化が魚類群集構造に与える影響を経年観察データから探るとともに,漁獲対象魚種の変化も調べることで,温暖化に伴う藻場植生の変化が魚類と漁業に与える影響を明らかにする。

Outline of Final Research Achievements

This study clarified the effects of the loss of kelp beds and changes in the Sargassum species composition on fish community structure by comparing current and historical data in the Kochi Prefecture, western Japan. In addition, tank experiments revealed that some fish species prefer specific Sargassum species, indicating that change in Sargassum species composition is one factor that alters fish community structure. Furthermore, interviews with fishermen in Kochi Prefecture revealed that the decrease in seaweed beds had a negative impact on artisanal fisheries targeting reef squid and abalone.

Academic Significance and Societal Importance of the Research Achievements

温暖化研究は気候変動に伴う生態系やその関連サービスの変化を予測し,その変化に対する対策や適応策を提示することで社会的課題の解決策を生み出すことを主目的としている。しかし,海藻藻場と魚類群集のつながりの強さに関する国内外の研究がほとんどないため,藻場変化に伴う魚類群集の変化予測に不確実性が伴うことが欠点であった。本研究によって各魚種の藻場に対する依存度が明らかにされたことで,藻場変化による魚類群集の変化予測の精度は格段に向上すると考えられる。

Report

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

    (7 results)

All 2023 2022 2021 2019

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

  • [Journal Article] The value of ecosystem services in global marine kelp forests2023

    • Author(s)
      Aaron M. Eger, Ezequiel M. Marzinelli, Rodrigo Beas-Luna, et al.
    • Journal Title

      Nature Communications

      Volume: 14 Issue: 1 Pages: 1894-1894

    • DOI

      10.1038/s41467-023-37385-0

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Differences in fish herbivory among tropical and temperate seaweeds and annual patterns in kelp consumption influence the tropicalisation of temperate reefs2022

    • Author(s)
      Verges A, Lanham BS, Kono M, Okumura S, Nakamura Y.
    • Journal Title

      Scientific Reports

      Volume: 12 Issue: 1 Pages: 21202-21202

    • DOI

      10.1038/s41598-022-24666-9

    • Related Report
      2022 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] Homogenization and miniaturization of habitat structure in temperate marine forests2021

    • Author(s)
      Pessarodona A, Filbee-Dexter K, Alcoverro T, Boada J, Feehan C, Fredriksen S, Grace S, Nakamura Y, Narvaez C, Norderhaug KM, Wernberg T
    • Journal Title

      Global Change Biology

      Volume: 27 Issue: 20 Pages: 5262-5275

    • DOI

      10.1111/gcb.15759

    • Related Report
      2021 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Unpredictable extreme cold events: a threat to range-shifting tropical reef fishes in temperate waters2019

    • Author(s)
      Leriorato JC, Nakamura Y
    • Journal Title

      Marine Biology

      Volume: 166 Issue: 8 Pages: 1-10

    • DOI

      10.1007/s00227-019-3557-6

    • Related Report
      2019 Research-status Report
    • Peer Reviewed / Int'l Joint Research
  • [Presentation] 四国西部におけるガラモ場の魚類群集構造の緯度間比較と魚類の海藻選好性2022

    • Author(s)
      土居真大・中村洋平
    • Organizer
      令和4年度日本水産学会中国・四国支部例会
    • Related Report
      2022 Annual Research Report
  • [Presentation] 土佐湾におけるガラモ場の海藻構成種の変化が魚類群集の構造に与える影響2022

    • Author(s)
      土居真大・中村洋平
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Research-status Report
  • [Presentation] 土佐湾の流れ藻の海藻構成種とブリ稚魚数:10年前と現在の比較2022

    • Author(s)
      西脇宙生・中村洋平・田中幸記
    • Organizer
      令和4年度日本水産学会春季大会
    • Related Report
      2021 Research-status Report

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Published: 2019-04-18   Modified: 2024-01-30  

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