1995 Fiscal Year Annual Research Report

生態システムのグローバル動態に関する数理的研究

Research Project

Project/Area Number	07304079
Research Category	Grant-in-Aid for Co-operative Research (A)
Research Institution	Nara Women's University
Principal Investigator	重定南奈子奈良女子大学, 理学部, 教授 (70025443)
Co-Investigator(Kenkyū-buntansha)	松田裕之九州大学, 理学部, 助教授 (70190478) 東正彦京都大学, 生態研センター, 教授 (40183917) 巖佐庸九州大学, 理学部, 教授 (70176535) 中島久男立命館大学, 理工学部, 教授 (40113112) 山村則男佐賀医科大, 教授 (70124815)
Keywords	species diversity / gap dynamics / lattice model / indirect effect / ecological interaction / biological invasion / range expansion / CA model
Research Abstract	本研究は,地球環境の変化に直面して様々な形で進んでいる生態システムのグローバル変化を,システムの多様性の維持,創出,保全などの問題に焦点を当てながら,数理的手法を用いて多角的に研究することを目指している.そのため,本年度はまず,奈良女子大学で班会議を開催し,以下の問題について班員がこれまで行なってきた研究成果を交換し,数学的手法の関連性,独自性,有効性について多角的に討議した. 1.陸域生態系の環境変動に対する応答,人為的撹乱による自然環境の分断化,不規則な気象変動に伴う環境撹乱がシステムのグローバル動態にもたらす影響を評価する方法として,空間構造をもつ格子モデルや偏微分方程式を用いたモデルを構築した.とくに,ギャップサイズ分布や種子分散の詳しいデータをもとに,森林分布域の地理的移動の長期予測を行なう方法について議論した(巖佐,高田,中島,東,山村) 2.侵入生物の広がりと生態システムへの波及効果,外来種の新天地への侵入と既存種への波及効果について数理モデルを用いて考察した.とくにわが国で猛威を振るっているマツ枯れの伝播とそのメカニズムを明らかにする数理モデルを構築した(瀬野,川崎,重定) 4.海洋資源の長期予測.地球環境が変動するなかで漁獲、放流が生態システムの長期保全に及ぼす影響を数理モデルを用いて解析し,持続可能な資源管理の方法について考察した.(松田,原田,難波) これらの討議をもとに今後より密接な研究交流を行なうなかで本研究の推進を図ることを確認した.

Research Products
(21 results)

All Other

All Publications (21 results)

[Publications] N.Shigesada: "Modeling Stratified Diffusion in Biological Invasions." American Naturalist. 146. 229-251 (1995)
[Publications] I.Tayasua: "Predator-mediated coexistence of epiphtyic grass shrimps that compete for refuges." Ecological Modelling. 84. 1-11 (1996)
[Publications] T.Koyama: "A size-distribution-based model of forest dynamics over a thermal gradient along latitude." Vegetatio. (in press).
[Publications] K.Aoki: "Travelling wave solutions for the spread of farmers into a region occupied by hunter-gatherers" Theoretical Population Biology. (in press).
[Publications] N.Yamamura: "Optimal strategy of plant antiherbivore defense:Implication for apparency and resource availability theories." Ecological Research. 10. 19-30 (1995)
[Publications] N.Yamamura: "Compromised strategy resolves intersexual conflict over precopulatory mate guarding duration." Evolutionary Ecology. (in press).
[Publications] Higashi,M: "Indirect effects in ecological interactionnetworks(I):" MathematicalBioscience. 130. 99-128 (1995)
[Publications] Nakajima,H: "Indirect effects in ecological interaction networks(II) refuges." Mathematical Bioscience. 130. 129-150 (1995)
[Publications] Patten,B.C.: "Firstf passage flows in ecological networks:measurement by input-output flow analysis" Ecological Modelling. 79. 67-74 (1995)
[Publications] Iwasa,Y.: "Forest gap dynamics with partically synchronized disturbances and gap age distribution" Ecological Modelling. 77. 57-271 (1995)
[Publications] Iwasa,Y.: "Coupling of fermentation and foraging strategies of herbivorous mammals" Journal of theoretical Biology. 172. 1-11 (1995)
[Publications] Iwasa,Y.: "Continual change in mate preferences" Nature. 377. 420-422 (1995)
[Publications] Matsuda,H.: "Plant-Herbivore Interactions and Theory of Coevolution" Plant Species Biology. 9(3). 155-162 (1995)
[Publications] Matsuda,H.: "Runaway evolution to self-extinction under asymmetric competition" Evolution. 48. 1764-1772 (1996)
[Publications] Takada,T.: "Evolution of semelparous and iteroparous perennial plants." Journal of Theoretical Biology. 173. 51-60 (1995)
[Publications] H.Seno: "Stationary rank-size relation for community of logistically growing groups" Journal of Biological Systems. (in press).
[Publications] Harada,Y.: "Population persistence and spatially limited social interaction." Theoretical Population Biology. 48. 65-91 (1995)
[Publications] Iwasa,Y.: "Maintenance of forest species divesity and latitudinal gradient" Vegetatio. 121. 127-134. (1995)
[Publications] 松田裕之: "『共生』とは何か-搾取と競争をこえた生物どうしの第三の関係" 現代書館, 230 (1995)
[Publications] 山村則男: "寄生から共生へ-昨日の敵は今日の友" 平凡社, 194 (1995)
[Publications] 巖佐庸(分担執筆): "婚姻システムの生物学的基礎" 雄山閣出版, 269-293 (1995)

1995 Fiscal Year Annual Research Report

生態システムのグローバル動態に関する数理的研究

Principal Investigator

重定 南奈子 奈良女子大学, 理学部, 教授 (70025443)

Research Products

[Publications] N.Shigesada: "Modeling Stratified Diffusion in Biological Invasions." American Naturalist. 146. 229-251 (1995)

[Publications] I.Tayasua: "Predator-mediated coexistence of epiphtyic grass shrimps that compete for refuges." Ecological Modelling. 84. 1-11 (1996)

[Publications] T.Koyama: "A size-distribution-based model of forest dynamics over a thermal gradient along latitude." Vegetatio. (in press).

[Publications] K.Aoki: "Travelling wave solutions for the spread of farmers into a region occupied by hunter-gatherers" Theoretical Population Biology. (in press).

[Publications] N.Yamamura: "Optimal strategy of plant antiherbivore defense:Implication for apparency and resource availability theories." Ecological Research. 10. 19-30 (1995)

[Publications] N.Yamamura: "Compromised strategy resolves intersexual conflict over precopulatory mate guarding duration." Evolutionary Ecology. (in press).

[Publications] Higashi,M: "Indirect effects in ecological interactionnetworks(I):" MathematicalBioscience. 130. 99-128 (1995)

[Publications] Nakajima,H: "Indirect effects in ecological interaction networks(II) refuges." Mathematical Bioscience. 130. 129-150 (1995)

[Publications] Patten,B.C.: "Firstf passage flows in ecological networks:measurement by input-output flow analysis" Ecological Modelling. 79. 67-74 (1995)

[Publications] Iwasa,Y.: "Forest gap dynamics with partically synchronized disturbances and gap age distribution" Ecological Modelling. 77. 57-271 (1995)

[Publications] Iwasa,Y.: "Coupling of fermentation and foraging strategies of herbivorous mammals" Journal of theoretical Biology. 172. 1-11 (1995)

[Publications] Iwasa,Y.: "Continual change in mate preferences" Nature. 377. 420-422 (1995)

[Publications] Matsuda,H.: "Plant-Herbivore Interactions and Theory of Coevolution" Plant Species Biology. 9(3). 155-162 (1995)

[Publications] Matsuda,H.: "Runaway evolution to self-extinction under asymmetric competition" Evolution. 48. 1764-1772 (1996)

[Publications] Takada,T.: "Evolution of semelparous and iteroparous perennial plants." Journal of Theoretical Biology. 173. 51-60 (1995)

[Publications] H.Seno: "Stationary rank-size relation for community of logistically growing groups" Journal of Biological Systems. (in press).

[Publications] Harada,Y.: "Population persistence and spatially limited social interaction." Theoretical Population Biology. 48. 65-91 (1995)

[Publications] Iwasa,Y.: "Maintenance of forest species divesity and latitudinal gradient" Vegetatio. 121. 127-134. (1995)

[Publications] 松田裕之: "『共生』とは何か-搾取と競争をこえた生物どうしの第三の関係" 現代書館, 230 (1995)

[Publications] 山村則男: "寄生から共生へ-昨日の敵は今日の友" 平凡社, 194 (1995)

[Publications] 巖佐 庸(分担執筆): "婚姻システムの生物学的基礎" 雄山閣出版, 269-293 (1995)

重定南奈子奈良女子大学, 理学部, 教授 (70025443)

[Publications] 巖佐庸(分担執筆): "婚姻システムの生物学的基礎" 雄山閣出版, 269-293 (1995)