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Eco-Evolutionary feedback of life-history decisions

Research Project

Project/Area Number 17K15197
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Ecology/Environment
Research InstitutionTokyo Metropolitan University (2018-2019)
Kyushu University (2017)

Principal Investigator

Tachiki Yuuya  首都大学東京, 理学研究科, 助教 (40741799)

Project Period (FY) 2017-04-01 – 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: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2018: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2017: ¥2,080,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥480,000)
Keywords数理モデル / 個体群動態 / 代替生活史戦術 / 進化生態フィードバック / 環境変化 / 生態的応答 / 進化的応答
Outline of Final Research Achievements

Alternative life-history tactics comprise discontinuous patterns of phenotypic variation, realized by divergent developmental programs. Each individual choose one of the tactics at a particular point in life. We developed a mathematical model that describes how life-history decision and the expression of the tactics affects population dynamics. We simultaneously consider the evolution of alternative tactics, under eco-evolutionary feedback. Changes in the state of population (e.g., population density) affect optimal tactics adopted by each individual, and thus the evolution of tactics could be driven by population dynamics and vice versa. We found the evolutionary bistability of the alternative tactics that the outcome of evolution depended on the initial condition and the stability of population at the evolutionary outcomes differed between outcomes.

Academic Significance and Societal Importance of the Research Achievements

生物には人生のスケジュールがあり、これを生活史と呼ぶ。生物によっては複数の人生プランを持つものがおり、各個体が状況に応じてどちらかを選択する。これを代替生活史戦術とよび、サケ科魚類の河川残留と摂餌回遊が有名である。本研究では、個体がどのように意思決定し、それが個体群内の相互作用を介してどのように進化するのかを数理モデルを用いて解析した。この研究は、水産資源として重要な魚類を含む野生生物について、外的環境変化が生活史を通して個体群(資源量)や、形質進化(特徴)にどのように影響するのかや、気候変動など環境改変が生態系に与える不可逆的な影響を与えるか否かを知るためのフレームワークを提供する。

Report

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

    (17 results)

All 2020 2019 2018 2017 Other

All Journal Article (3 results) (of which Int'l Joint Research: 1 results,  Peer Reviewed: 2 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 4 results,  Invited: 3 results) Book (1 results) Remarks (2 results)

  • [Journal Article] どんぐり豊凶の進化生態学2019

    • Author(s)
      立木佑弥
    • Journal Title

      JSMB Newsletter

      Volume: 89 Pages: 2-6

    • Related Report
      2019 Annual Research Report
  • [Journal Article] Evolutionary bistability of life history decision in male masu salmon2018

    • Author(s)
      Horita Junnosuke、Iwasa Yoh、Tachiki Yuuya
    • Journal Title

      Journal of Theoretical Biology

      Volume: 448 Pages: 104-111

    • DOI

      10.1016/j.jtbi.2018.04.008

    • Related Report
      2018 Research-status Report
    • Peer Reviewed
  • [Journal Article] HIV-1 competition experiments in humanized mice show that APOBEC3H imposes selective pressure and promotes virus adaptation.2017

    • Author(s)
      Yusuke Nakano, Naoko Misawa, Guillermo Juarez-Fernandez, Miyu Moriwaki, Shinji Nakaoka, Takaaki Funo, Eri Yamada, Andrew Soper, Rokusuke Yoshikawa, Diako Ebrahimi, Yuuya Tachiki, Shingo Iwami, Reuben S. Harris, Yoshio Koyanagi & Kei Sato
    • Journal Title

      PLOS Pathogens

      Volume: 13 Issue: 5 Pages: 31-31

    • DOI

      10.1371/journal.ppat.1006348

    • Related Report
      2017 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Presentation] タケササ類開花周期の地理的クライン形成:空間をめぐる競争の効果について2020

    • Author(s)
      立木佑弥
    • Organizer
      第67回日本生態学会
    • Related Report
      2019 Annual Research Report
  • [Presentation] 種間競争による種分化率の減少2019

    • Author(s)
      立木佑弥
    • Organizer
      2019年度 日本数理生物学会年会
    • Related Report
      2019 Annual Research Report
  • [Presentation] "タケササ類の開花周期と地下茎構造にみられる地理的クラインの形成機構 "2019

    • Author(s)
      立木佑弥
    • Organizer
      第35回個体群生態学会大会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] 植物の開花戦略の進化生態学2019

    • Author(s)
      立木佑弥
    • Organizer
      2019年度 日本数理生物学会年会
    • Related Report
      2019 Annual Research Report
    • Invited
  • [Presentation] Short clonal dispersal is favored under spatial heterogeneity2019

    • Author(s)
      Yuuya Tachiki
    • Organizer
      British Ecological Society Annual Meeting 2019
    • Related Report
      2019 Annual Research Report
    • Int'l Joint Research
  • [Presentation] 樹木豊凶と種子捕食者の休眠延長戦略の共進化動態.2019

    • Author(s)
      立木 佑弥
    • Organizer
      日本生態学会
    • Related Report
      2018 Research-status Report
  • [Presentation] 数理的表現でみる生き物の生態2019

    • Author(s)
      立木 佑弥
    • Organizer
      日本生態学会
    • Related Report
      2018 Research-status Report
    • Invited
  • [Presentation] The evolution of a geographic cline in flowering time in bamboos.2018

    • Author(s)
      Yuuya Tachiki
    • Organizer
      2018 Annual Meeting of the Society for Mathemtaical Biology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] The evolution of rhizome system in bamboos under spatial heterogeneities.2018

    • Author(s)
      Yuuya Tachiki
    • Organizer
      11th European Conference on Mathematical and Theoretical Biology
    • Related Report
      2018 Research-status Report
    • Int'l Joint Research
  • [Presentation] 集団免疫が駆動するウイルス進化動態2017

    • Author(s)
      立木 佑弥
    • Organizer
      日本数理生物学会
    • Related Report
      2017 Research-status Report
  • [Presentation] A spatially explicit model for the evolution of rhizome system in bamboos2017

    • Author(s)
      Yuuya Tachiki
    • Organizer
      Ecology Across Borders
    • Related Report
      2017 Research-status Report
    • Int'l Joint Research
  • [Book] 遺伝子・多様性・循環の科学2019

    • Author(s)
      門脇 浩明、立木 佑弥
    • Total Pages
      446
    • Publisher
      京都大学学術出版会
    • ISBN
      4814001908
    • Related Report
      2018 Research-status Report
  • [Remarks] Research Map

    • URL

      https://researchmap.jp/yuuya_tachiki/

    • Related Report
      2019 Annual Research Report
  • [Remarks] Researchmap

    • URL

      https://researchmap.jp/yuuya_tachiki/

    • Related Report
      2018 Research-status Report

URL: 

Published: 2017-04-28   Modified: 2021-02-19  

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