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Creating marine forests that can withstand herbivory

Research Project

Project/Area Number 17KT0149
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeMulti-year Fund
Section特設分野
Research Field Agricultural Resources for the Next Generation
Research InstitutionNagasaki University

Principal Investigator

NISHIHARA Gregory N.  長崎大学, 海洋未来イノベーション機構, 准教授 (40508321)

Co-Investigator(Kenkyū-buntansha) 戸田 龍樹  創価大学, 理工学部, 教授 (10222150)
Project Period (FY) 2017-07-18 – 2020-03-31
Project Status Completed (Fiscal Year 2019)
Budget Amount *help
¥4,550,000 (Direct Cost: ¥3,500,000、Indirect Cost: ¥1,050,000)
Fiscal Year 2019: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2018: ¥1,170,000 (Direct Cost: ¥900,000、Indirect Cost: ¥270,000)
Fiscal Year 2017: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
Keywordsウニ / いそやけ / 回復 / 栄養塩 / 捕食者 / 被食者 / 付着藻類 / 藻場 / 付着珪藻 / marine forests / herbivory / seaweed bed restoration / seaweed / macroalgae
Outline of Final Research Achievements

The economic potential of our regional fisheries communities are in danger because of the degradation of seaweed ecosystems. One of the most important function of seaweed ecosystems is providing a place for food, spawning, and growth for economically important species. We show that biocontrol is a possible means of controlling herbivores to enable the restoration of seaweed ecosystems. We show that if sea urchins are exposed to predation risk, we can control the feeding behavior. However, the interactive effects of seaweed growth and predation risk was inconclusive.

Academic Significance and Societal Importance of the Research Achievements

海藻の捕食者の駆除は藻場生態系の保全に欠かせない条件ではないと考えられる。海藻を食べる捕食者の摂餌行動を変えることで、食圧を制御することが可能である。たとえば、ウニに対する捕食のリスクが高まると、ウニ行動に制限がかかり、海藻を頻度が下がることを証明した。藻場生態系の回復と保全は完全な植食性生物の駆除が不要であり、持続可能な藻場生態系の管理は現実的であると考えられる。

Report

(4 results)
  • 2019 Annual Research Report   Final Research Report ( PDF )
  • 2018 Research-status Report
  • 2017 Research-status Report
  • Research Products

    (7 results)

All 2020 2019 2017

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

  • [Journal Article] Effects of dead conspecifics, hunger states, and seasons on the foraging behavior of the purple urchin Heliocidaris crassispina2020

    • Author(s)
      Belleza DFC, Kawabata Y, Toda T, Nishihara GN
    • Journal Title

      bioRxiv

      Volume: March Pages: 1-64

    • DOI

      10.1101/2020.03.09.984674

    • Related Report
      2019 Annual Research Report
    • Open Access / Int'l Joint Research
  • [Presentation] Predation signals indirectly protect seaweed beds by modifying sea urchin foraging behavior2020

    • Author(s)
      Belleza DFC, Kawabata Y, Toda T, Nishihara GN
    • Organizer
      日本藻類学会第44回大会
    • Related Report
      2019 Annual Research Report
  • [Presentation] Effects of predation risk on urchin grazing behavior on Sargassum patens C. Agardh2019

    • Author(s)
      Belleza DFC, Kawabata Y, Nishihara GN
    • Organizer
      23rd International Seaweed Symposium
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] The growth and survival of Sargassum macrocarpum C. Agardh juveniles in vegetated and barren ecosystems2019

    • Author(s)
      Matsuda Y, Hinode K, Inoue Y, Osaki K, Kamisaki H, Belleza DFC, Kawate A, Hatata N, Nishihara GN
    • Organizer
      23rd International Seaweed Symposium
    • Related Report
      2019 Annual Research Report
  • [Presentation] Observation of Trait Mediated Indirect Interactions (TMII) of purple urchins in an algal forest patch2019

    • Author(s)
      Dominic Franco C. Belleza, Yuuki Kawabata, Gregory N. Nishihara
    • Organizer
      日本藻類学会第43会大会
    • Related Report
      2018 Research-status Report
  • [Presentation] Effects of predation risk on urchin grazing behavior on Sargassum patens C. Agardh2019

    • Author(s)
      Dominic Franco C. Belleza, Yuuki Kawabata, Gregory N. Nishihara
    • Organizer
      The 23rd International Seaweed Symposium
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] Higher-order modeling of photosynthesis-temperature curves2017

    • Author(s)
      Gregory N. Nishihara, Ryuta Terada, Iris Ann Borlongan, Yukio Inoue, Satoshi Shimada
    • Organizer
      The 8th Asian Pacific Phycological Forum
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research

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Published: 2017-07-21   Modified: 2021-02-19  

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