| Project/Area Number |
21770091
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Biodiversity/Systematics
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| Research Institution | Toho University |
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Principal Investigator |
TAKIMOTO Gaku Toho University, 理学部, 講師 (90453852)
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| Research Collaborator |
KAGAWA Koutarou 東邦大学, 理学部・生物学科4年
ARMSTRONG Doug Massey University, Conservation Biology, Professor
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|---|
| Project Period (FY) |
2009 – 2010
|
| Project Status |
Completed (Fiscal Year 2010)
|
| Budget Amount *help |
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2010: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2009: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000)
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| Keywords | 数理モデル / ギルド内捕食 / 一次生産性 / 撹乱 / 生態系サイズ / 食物連鎖長 / ギルド内補食 / 進化生物学 |
|---|
| Research Abstract |
What environmental factors determine food-chain length (the number of trophic levels in food webs)? While previous hypotheses consider primary productivity, disturbance, or ecosystem size as an important determinant, recent empirical works tend to find a strong effect of ecosystem size. We used a mathematical model incorporating all three potential determinants to show the strongest influence of ecosystem size. This theory explains the existing empirical pattern, and may be useful for the management of fishery and agricultural ecosystems.
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