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A biodiversity theory incorporating intra- and inter specific effects

Research Project

Project/Area Number 26840143
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Ecology/Environment
Research InstitutionThe Graduate University for Advanced Studies

Principal Investigator

Ohtsuki Hisashi  総合研究大学院大学, 先導科学研究科, 講師 (50517802)

Project Period (FY) 2014-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2016: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000)
Fiscal Year 2015: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Keywords生物多様性 / 理論モデル / 共生 / 被食捕食 / 競争 / 中立モデル / 群集の中立説 / シミュレーション / ランダム群集モデル / 進化ゲーム理論 / 検定 / 中立説 / 群集生態学 / 負の密度依存 / 負の頻度依存
Outline of Final Research Achievements

Biodiversity is an important issue in ecology, and the mechanism of its maintenance needs to be clarified. A previous "neutral model" of biodiversity paid particular attention to the balance between immigration and local extinction to explain the diversity, while the role of intra specific effects have been underrepresented. I have developed a new theoretical model that incorporates those effects as the third factor to reveal their role in the maintenance of biodiversity. I have found that mutualism and competition produce a few dominant species and many rare ones, and that prey-predator relations produce many intermediate ones. I also found that the deviation from neutrality is detected effectively by the species-frequency-weighted measures of biodiversity, not by the bare total number of species.

Report

(4 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • Research Products

    (2 results)

All 2017 2015

All Presentation (2 results) (of which Invited: 1 results)

  • [Presentation] 自然選択がもたらす中立群集からのずれ:進化ゲーム理論からの試み2017

    • Author(s)
      大槻 久
    • Organizer
      第64回日本生態学会
    • Place of Presentation
      早稲田大学早稲田キャンパス
    • Related Report
      2016 Annual Research Report
  • [Presentation] デモグラフィーから見た群集中立性の再検討2015

    • Author(s)
      大槻 久・竹内やよい
    • Organizer
      第62回日本生態学会大会
    • Place of Presentation
      鹿児島大学
    • Year and Date
      2015-03-19
    • Related Report
      2014 Research-status Report
    • Invited

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Published: 2014-04-04   Modified: 2018-03-22  

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