Structure and dynamics of biological communities determined by synergy of top-down and bottom-up effects
| Project/Area Number |
26440247
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Ecology/Environment
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
Namba Toshiyuki 大阪府立大学, 理学(系)研究科(研究院), 客員研究員 (30146956)
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| Project Period (FY) |
2014-04-01 – 2018-03-31
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| Project Status |
Completed (Fiscal Year 2017)
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| Budget Amount *help |
¥5,070,000 (Direct Cost: ¥3,900,000、Indirect Cost: ¥1,170,000)
Fiscal Year 2016: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2015: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2014: ¥2,210,000 (Direct Cost: ¥1,700,000、Indirect Cost: ¥510,000)
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| Keywords | 生物群集 / 構造 / 安定性 / ボトムアップ効果 / トップダウン効果 / 食物網 / ギルド内捕食 / 植食者 |
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| Outline of Final Research Achievements |
In order to elucidate the synergistic effect of top-down and bottom-up effects, two mathematical models were mainly analyzed. In the system consisting of herbivore and two species of plants, the extreme differences in preference of the herbivore and the eutrophication of the system produce violent population fluctuations, but the variation in populations caused by the circulation of nutrient through excrement of the herbivore turns out to be milder. In the intraguild predation model, in which one of the two predators sharing a common prey feeds on the other, three models are proposed to resolve the contradiction that the extinction of the intermediate predator predicted by theory is not supported by empirical observations, and further the top down effect by higher predators are clarified.
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Report
(5 results)
Research Products
(29 results)
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[Presentation] 栽培管理が生物的防除の効率に与える影響2016
Author(s)
池川雄亮, 森光太郎, 大朝真喜子, 藤田一平, 渡邊丈夫, 江副日出夫, 難波利幸
Organizer
日本昆虫学会第76回大会・第60回日本応用動物昆虫学会大会合同大会
Place of Presentation
大阪府立大学（大阪府堺市）
Year and Date
2016-03-27
Related Report
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