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Theoretical studies on hybridization and the evolution and maintenance of biodiversity

Research Project

Project/Area Number 19870022
Research Category

Grant-in-Aid for Young Scientists (Start-up)

Allocation TypeSingle-year Grants
Research Field Biodiversity/Systematics
Research InstitutionToho University

Principal Investigator

TAKIMOTO Gaku  Toho University, 理学部, 講師 (90453852)

Research Collaborator OGURA Naoko  東邦大学, 理学部, 生物学科4年
Project Period (FY) 2007 – 2008
Project Status Completed (Fiscal Year 2008)
Budget Amount *help
¥1,840,000 (Direct Cost: ¥1,600,000、Indirect Cost: ¥240,000)
Fiscal Year 2008: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2007: ¥800,000 (Direct Cost: ¥800,000)
Keywords雑種 / 種分化 / 生物多様性 / 超越分離 / 個体ベースモデル / 種分化の逆転
Research Abstract

外来種や生息環境の破壊がもたらす雑種形成が問題となっている。雑種形成により2種が融合して1種となる「種分化の逆転」が起こることもあるが、雑種が第3の種として新たな生息地で確立する「雑種種分化」が起こることもある。本研究ではコンピュータシミュレーションを用いて、生息環境の改変が近縁な2種の雑種形成をもたらした場合、雑種種分化ではなく種分化の逆転が起きてしまう可能性が高いことを明らかにした。

Report

(3 results)
  • 2008 Annual Research Report   Final Research Report ( PDF )
  • 2007 Annual Research Report
  • Research Products

    (13 results)

All 2009 2008 Other

All Journal Article (6 results) (of which Peer Reviewed: 6 results) Presentation (4 results) Book (2 results) Remarks (1 results)

  • [Journal Article] Timescale hierarchy determines the indirect effects of fluctuating subsidy inputs on in situ resources2009

    • Author(s)
      Gaku Takimoto, Tomoya Iwata, Masashi Murakami
    • Journal Title

      American Naturalist 173

      Pages: 200-211

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Early warning signals of demographic regime shifts in invading populations2009

    • Author(s)
      Gaku Takimoto
    • Journal Title

      Population Ecology 51

      Pages: 412-426

    • NAID

      10025310440

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Timescale hierarchy determines the indirect effects of fluctuating subsidy inputs on in situresources2009

    • Author(s)
      Gaku Takimoto, Tomoya Iwata, Masashi Murakami
    • Journal Title

      American Naturalist 173

      Pages: 200-211

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Ecosystem size, but not disturbance2008

    • Author(s)
      Gaku Takimoto, David A. Spiller, David M. Post
    • Journal Title

      determines food-chain length on islands of the Bahamas、Ecology 17

      Pages: 30-44

    • Related Report
      2008 Final Research Report
    • Peer Reviewed
  • [Journal Article] Ecosystem size, but not disturbance, determines food-chain length on islands of the Bahamas.2008

    • Author(s)
      Gaku Takimoto, David A. Spiller, David M. Post
    • Journal Title

      Ecology 17

      Pages: 30-44

    • Related Report
      2008 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Blackwell Publishing LtdSpeciation reversal and biodiversity dynamics with hybridization in changing environments2008

    • Author(s)
      O. Seehausen, G. Takimoto(共に主著者、アルファベット順)
    • Journal Title

      Molecular Ecology 17

      Pages: 30-44

    • Related Report
      2007 Annual Research Report
    • Peer Reviewed
  • [Presentation] アリー効果と外来生物の個体数増加警報2009

    • Author(s)
      瀧本岳
    • Organizer
      第56回日本生態学会
    • Place of Presentation
      盛岡
    • Year and Date
      2009-03-19
    • Related Report
      2008 Final Research Report
  • [Presentation] アリー効果と外来生物の個体数増加警報2009

    • Author(s)
      瀧本岳
    • Organizer
      日本生態学会第56回全国大会
    • Place of Presentation
      岩手県立大学
    • Year and Date
      2009-03-19
    • Related Report
      2008 Annual Research Report
  • [Presentation] ギルド内捕食系研究の現状と課題2008

    • Author(s)
      瀧本岳
    • Organizer
      第55回日本生態学会(企画集会「雑食 : 食物網における直接効果と間接効果をつなぐ」)
    • Place of Presentation
      福岡
    • Year and Date
      2008-03-16
    • Related Report
      2008 Final Research Report
  • [Presentation] ガンマ多様性はメタ群集の存続可能性を高めるか?2008

    • Author(s)
      瀧本岳
    • Organizer
      第55回日本生態学会(企画集会「メタ群集研究における理論的・実証的アプローチ」)
    • Place of Presentation
      福岡
    • Year and Date
      2008-03-14
    • Related Report
      2008 Final Research Report
  • [Book] メタ群集と空間スケール2008

    • Author(s)
      瀧本岳
    • Total Pages
      38
    • Publisher
      京都大学学術出版会
    • Related Report
      2008 Final Research Report
  • [Book] メタ群集と空間スケール2008

    • Author(s)
      瀧本岳(共著)
    • Publisher
      京都大学学術出版会
    • Related Report
      2008 Annual Research Report
  • [Remarks]

    • URL

      http://www.lab.toho-u.ac.jp/sci/bio/theoeco/

    • Related Report
      2008 Annual Research Report

URL: 

Published: 2007-04-01   Modified: 2016-04-21  

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