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2011 Fiscal Year Annual Research Report

適応進化する生態系ダイナミックスの理論的研究

Research Project

Project/Area Number 21370012
Research InstitutionKyushu University

Principal Investigator

巌佐 庸  九州大学, 大学院・理学研究院, 教授 (70176535)

Keywords種の多様性 / 中立モデル / 伝統漁法 / 社会的関心の喚起 / 樹木の一斉開花 / 海藻の世代交代 / 形態形成 / 数理モデル
Research Abstract

地球上には非常に多様な生物が棲み、競争や、捕食、共生などのさまざまな関係を結ぶ。生息地の間を移動や分散し、個体数変動やときには局所的絶滅を示す。そしてその生活の結果、土壌をつくり気候を穏やかにし、水や元素などの循環をもたらす。生物がその生活を通じてつくりあげるシステムの全体を、生態系という。
今年度は、以下の課題において成果を挙げた:
(1)孤立する森林や島状の生息地(もしくは保護区)において、時間とともに種数が減少するプロセスに関する新しい公式を導いた。それによると面積および生育できる総個体数が、多様性保持に最も重要である。これは保護区を設定するに際してこれまで用いてきたクライテリアに疑問を呈するものである。論文はPNASに掲載された。
(2)韓国チェジュ島における伝統的漁法(海女)とエコツーリズムとの兼ね合いを生態経済学的に解析した。論文はEcol.Econ.い掲載。また保護区に対する住民への関心を高める活動(環境教育など)にどれだけの資源(人員)を割くべきかを議論する動的最適化理論の論文を執筆し投稿した。
(3)樹木の一斉開花結実の進化要因を解析する理論的研究を進めた。更新における実生集団の影響が改めて明確になり、捕食者の影響も調べた。J.Ecology, Theor.Popul.Biol.等に数編掲載した。
(4)そのほか、海藻の生活史(異形世代交代と同形世代交代)の進化の説明、捕食者と被食者の共進化と表現型可塑性がもたらすダイナミックスへの影響を解析した。(EER, JTB, Evolutionなど)
(5)加えて発生に置ける形態形成のモデル化も進めた。これは生態系の機能の多様性に深い関連がある。(Biophysical J., JTB, Phys.Rev.E, PNASなど)

  • Research Products

    (30 results)

All 2012 2011 Other

All Journal Article (15 results) (of which Peer Reviewed: 9 results) Presentation (14 results) Remarks (1 results)

  • [Journal Article] Evolutionary jumping and breakthrough in the trees' masting evolution2012

    • Author(s)
      Tachiki, Y. andY. Iwasa
    • Journal Title

      Theoretical Population Biology

      Volume: 81 Pages: 20-31

  • [Journal Article] Multiple feedback loops achieve robust localization of wingless expression in Drosophila notum development2012

    • Author(s)
      Hironaka, K., Y.Iwasa, Y.Morishita
    • Journal Title

      Journal of Theoretical Biology

      Volume: 292 Pages: 18-29

    • Peer Reviewed
  • [Journal Article] Burrowing in the bark or in the sapwood : a dynamic game between a mother and her offspring2012

    • Author(s)
      Uchinomiya, K, Y.Iwasa
    • Journal Title

      Evolutionary Ecology Researech

      Volume: (印刷中)

    • Peer Reviewed
  • [Journal Article] A stochastic model of chromatin modification : cell population coding of winter memory in plants2012

    • Author(s)
      Satake, A., Y.Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: (印刷中)

    • Peer Reviewed
  • [Journal Article] Coding design of positional information for robust morphogenesis2011

    • Author(s)
      Morishita, Y. and Y. Iwas
    • Journal Title

      Biophysical Journal

      Volume: 101 Pages: 2324-2335

  • [Journal Article] Tourists and traditional divers in a common fishing ground2011

    • Author(s)
      Lee, Joung-Hun and Y. Iwasa
    • Journal Title

      Ecological Economics

      Volume: 70 Pages: 2350-2360

  • [Journal Article] Green world maintained by adaptation2011

    • Author(s)
      Mougi, A., and Y. Iwasa
    • Journal Title

      Theoretical Ecology

      Volume: 4 Pages: 201-210

  • [Journal Article] Unique coevolutionary dynamics in a predator-prey system2011

    • Author(s)
      Mougi, A. and Y. Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: 277 Pages: 83-89

  • [Journal Article] T cell anergy as a strategy to reduce the risk of autoimmunity2011

    • Author(s)
      Saeki, K. and Y. Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: 277 Pages: 74-82

  • [Journal Article] Neutral theory as a predictor of avifaunal extinctions following habitat loss2011

    • Author(s)
      Halley, J.M., Y.Iwasa
    • Journal Title

      Proc.Nat.Acad.Sci.USA

      Volume: 108 Pages: 2316-2321

    • Peer Reviewed
  • [Journal Article] Coevolution of phenotypic plasticity in predator and prey : why inducible offense is rarer than inducible defense?2011

    • Author(s)
      Mougi, A., O.Kishida, Y.Iwasa
    • Journal Title

      Evolution

      Volume: 65 Pages: 1079-1081

    • Peer Reviewed
  • [Journal Article] Regime shift and robustness of organism-created environment : a model for microbial ecosystem2011

    • Author(s)
      Seto, M., Y.Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: 269 Pages: 297-306

    • Peer Reviewed
  • [Journal Article] Long-term effect of coral transplantation : Restoration-goals and the choice of species2011

    • Author(s)
      Muko, S., Y.Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: 280 Pages: 127-138

    • Peer Reviewed
  • [Journal Article] Evolutionary dynamics of tumor diversity2011

    • Author(s)
      Iwasa, Y., F.Michor
    • Journal Title

      PLoS ONE

      Volume: 6 Pages: e17866

    • Peer Reviewed
  • [Journal Article] Optimal choice of species and size classes for transplantation of coral community2011

    • Author(s)
      Muko, S., Y.Iwasa
    • Journal Title

      Journal of Theoretical Biology

      Volume: 273 Pages: 130-137

    • Peer Reviewed
  • [Presentation] Mathematical Models of Biological Phenomena and their Analysis" "Evolution of synchronized and intermittent reproduction of trees2012

    • Author(s)
      Yoh Iwasa
    • Organizer
      Mathematical Models of Biological Phenomena and their Analysis : Interdisciplinary Mathematics toward Smart Innovations
    • Place of Presentation
      Sendai
    • Year and Date
      2012-11-23
  • [Presentation] Graduated punishmentはどうして望ましいのか?2012

    • Author(s)
      巌佐庸
    • Organizer
      ゲーム理論ワークショップ2012
    • Place of Presentation
      静岡大学浜松キャンパス
    • Year and Date
      2012-03-06
  • [Presentation] Plenary Talk. "Evolution of masting : synchronized and intermittent reproduction of trees."2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Fifth International Congress on Mathematical Biology. Chinese Society for Mathematical Biology
    • Place of Presentation
      Nanjing, China
    • Year and Date
      20110603-20110605
  • [Presentation] Neutral theory as a predictor of avifaunal extinctions after habitat loss2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Symposium for the 100 years Anniversary of Kyushu University, "Asian Conservation Ecology."
    • Place of Presentation
      Inamori Hall, Kyushu University
    • Year and Date
      2011-11-19
  • [Presentation] 「数理生物学とは--発ガンを進化過程とみて」東京2011

    • Author(s)
      巌佐庸
    • Organizer
      慶応大学医学部発生分化研究室セミナー
    • Place of Presentation
      慶応大学医学部
    • Year and Date
      2011-10-29
  • [Presentation] 生息地削減後の種数減少の新公式と鳥類種数のデータによる検証2011

    • Author(s)
      巌佐庸
    • Organizer
      明治大学先端数理科学研究科開設記念講演会「現象数理学の将来の展望」
    • Place of Presentation
      明治大学
    • Year and Date
      2011-10-05
  • [Presentation] 樹木の一斉開花・結実の進化2011

    • Author(s)
      巌佐庸
    • Organizer
      北海道大学大学院理学研究科行動知能特別セミナー
    • Place of Presentation
      北海道大学理学研究科
    • Year and Date
      2011-09-29
  • [Presentation] Evolution of masting : synchronized and intermittent reproduction of trees2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Special Seminar, Institute of Science and Technology, Austria
    • Place of Presentation
      IST, Klosterneuburg, Austria
    • Year and Date
      2011-09-14
  • [Presentation] Evolution of masting : synchronized and intermittent reproduction of trees2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Keynote Speaker, European Conference on Complex Systems 2011 (ECCS'11 Vienna)
    • Place of Presentation
      Univ.Vienna, Austria
    • Year and Date
      2011-09-13
  • [Presentation] Neutral theory as a predictor of avifaunal extinctions after habitat loss2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Special seminar, In the joint seminar between Dept of Mathematical and Biology, Pusan National University
    • Place of Presentation
      Pusan National Univ., Korea
    • Year and Date
      2011-08-27
  • [Presentation] Modeling morphogenesis in development2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      International Congress of Natural Sciences, Pukyeon National University
    • Place of Presentation
      Pukyeon Natl.Univ., Busan, Korea
    • Year and Date
      2011-08-26
  • [Presentation] 生物を数学モデルで理解する2011

    • Author(s)
      巌佐庸
    • Organizer
      九州大学理学部生物学科公開講演会
    • Place of Presentation
      国際ホール
    • Year and Date
      2011-08-13
  • [Presentation] Neutral theory as a predictor of avifaunal extinctions after habitat loss2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      6th Asian Conservation Ecology International seminar
    • Place of Presentation
      Kyushu University
    • Year and Date
      2011-08-12
  • [Presentation] Invited speaker, "Evolution of masting : synchronized and intermittent reproduction of trees."2011

    • Author(s)
      Yoh Iwasa
    • Organizer
      Seventh International Congress on Industrial and Applied Mathematics (ICIAM 2011)
    • Place of Presentation
      Vancouver, Canada
    • Year and Date
      2011-07-20
  • [Remarks]

    • URL

      http://bio-math10.biology.kyushu-u.ac.jp/~iwasa/

URL: 

Published: 2013-06-26  

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