2012 Fiscal Year Final Research Report
A synthesis of metabolic theory of ecology: Toward an integration of allometric scaling and ecological stoichiometry
| Project/Area Number |
23657019
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Multi-year Fund |
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| Research Field |
Ecology/Environment
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| Research Institution | Kyoto University |
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Principal Investigator |
OKUDA Noboru 京都大学, 生態学研究センター, 准教授 (30380281)
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| Co-Investigator(Kenkyū-buntansha) |
KONDOH Michio 龍谷大学, 理工学部, 准教授 (30388160)
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| Project Period (FY) |
2011 – 2012
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| Keywords | 群集 |
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| Research Abstract |
The rate of metabolism which is a fundamental biochemical reaction shared among all organisms scales with the power function of their body mass. Focusing on this size-scaling law, we aimed at constructing a conceptual framework of “ecosystem metabolism” to formulate a relationship between size structure and ecosystem-level metabolism of biological communities. We examined what determines the ecosystem metabolism of plankton communities in resource-controlled lake mesocosms. Our experimental results did not support the prediction deduced from the size-scaling law in that mass-specific ecosystem metabolism would be higher in communities with smaller-sized plankton. Instead, wefound that plankton stoichiometry (i.e., C:N:P) was the most influential factor for the ecosystem metabolism. We suggest that the availability of least nutrients can limit the rate of transferring metabolites to all member of community under trophic interactions, consequently regulating the metabolic rate of whole community. To understand controlling mechanisms for ecosystem metabolism, we emphasize the importance of synthetic model in which ecological stoichiometry as well as allometric scaling is integrated into the metabolic theory.
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[Journal Article]2012
Author(s)
Kuwae T., E. Miyoshi, S. Hosokawa, K. Ichimi, J. Hosoya, T. Amano, T. Moriya, M. Kondoh, R. C. Ydenberg, R. W. Elner
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Journal Title
Ecology Letters
Volume: 15巻
Pages: 347-356
DOI
Peer Reviewed
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[Book] A food web and its long-term dynamics in Lake Biwa: a stable isotope approach In: Lake Biwa: Interactions between Nature and People2012
Author(s)
Okuda, N., T. Takeyama, T. Komiya, Y. Kato, Y. Okuzaki, Z. Karube, Y. Sakai, M. Hori, I. Tayasu, T. Nagata
Total Pages
205-210
Publisher
Springer
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