Population Uncertainty in Model Ecosystem : Analysis by Stochastic Differential Equation(Cross-disciplinary physics and related areas of science and technology)
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概要
- 論文の詳細を見る
Perturbation experiments are carried out by the numerical simulations of a contact process and its mean-field version. Here, the mortality rate increases or decreases suddenly. It is known that fluctuation enhancement (FE) occurs after perturbation, where FE indicates population uncertainty. In the present paper, we develop a new theory of stochastic differential equation. The agreement between the theory and the mean-field simulation is almost perfect. This theory enables us to find a much stronger FE than that reported previously. We discuss the population uncertainty in the recovering process of endangered species.
- 社団法人日本物理学会の論文
- 2008-09-15
著者
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MORITA Satoru
Department of Radiology, Tokyo Womens Medical University Medical Center East
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Tainaka Kei-ichi
Department Of Systems Engineering Shizuoka University
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Yoshimura Jin
Department Of Systems Engineering Shizuoka University
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Morita Satoru
Department Of Gastroenterology Hamamatsu Medical Center Hamamatsu University School Of Medicine
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NAGATA Hiroyasu
Department of Systems Engineering, Shizuoka University
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Tainaka Kei-ichi
Department Of Mathematical Science Ibaraki University
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Nagata Hiroyasu
Department Of Systems Engineering Shizuoka University
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Yoshimura Jin
Marine Biosystems Research Center Chiba University
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Morita Satoru
Department Of Cardiovascular Surgery National Hospital Organization Higashihiroshima Medical Center
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