2012 Fiscal Year Final Research Report
IsoWeb: a Bayesian isotope mixing model for diet analysis of the whole food web
| Project/Area Number |
22510249
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Resource conservation science
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| Research Institution | National Institute for Environmental Studies |
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Principal Investigator |
KADOYA Taku 独立行政法人国立環境研究所, 生物・生態系環境研究センター, 研究員 (40451843)
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| Co-Investigator(Kenkyū-buntansha) |
TAKIMOTO Gaku 東邦大学, 理学部, 准教授 (90453852)
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| Project Period (FY) |
2010 – 2012
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| Keywords | 生態系機能 / 生物多様性 / 群集生態学 / 安定同位体 / 食性分析 |
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| Research Abstract |
We developed a novel mixing model (IsoWeb) that estimates diet proportions of all consumers in a food web based on stable isotope information. IsoWeb requires a topological description of a food web, and stable isotope signatures of all consumers and resources in the web. A merit of IsoWeb is that it takes into account variation in trophic enrichment factors among different consumer-resource links. Sensitivity analysis using real and hypothetical food webs suggests that IsoWeb is applicable to a wide variety of food webs differing in the number of species, connectance, sample size, and data uncertainty. Moreover, using an illustrative application to a real food web, we demonstrated that IsoWeb can compare the plausibility of different candidate topologies for a focal web
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