Bayesian stable isotope mixing models
نویسندگان
چکیده
منابع مشابه
Recent Bayesian stable-isotope mixing models are highly sensitive to variation in discrimination factors.
Stable isotopes are now used widely in ecological studies, including diet reconstruction, where quantitative inferences about diet composition are derived from the use of mixing models. Recent Bayesian models (MixSIR, SIAR) allow users to incorporate variability in discrimination factors (delta13C or delta15N), or the amount of change in either delta13C or delta15N between prey and consumer, bu...
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Reconstructing the diet of top marine predators is of great significance in several key areas of applied ecology, requiring accurate estimation of their true diet. However, from conventional stomach content analysis to recent stable isotope and DNA analyses, no one method is bias or error free. Here, we evaluated the accuracy of recent methods to estimate the actual proportion of a controlled d...
متن کاملQuantifying Inter- and Intra-Population Niche Variability Using Hierarchical Bayesian Stable Isotope Mixing Models
Variability in resource use defines the width of a trophic niche occupied by a population. Intra-population variability in resource use may occur across hierarchical levels of population structure from individuals to subpopulations. Understanding how levels of population organization contribute to population niche width is critical to ecology and evolution. Here we describe a hierarchical stabl...
متن کاملIncorporating uncertainty and prior information into stable isotope mixing models.
Stable isotopes are a powerful tool for ecologists, often used to assess contributions of different sources to a mixture (e.g. prey to a consumer). Mixing models use stable isotope data to estimate the contribution of sources to a mixture. Uncertainty associated with mixing models is often substantial, but has not yet been fully incorporated in models. We developed a Bayesian-mixing model that ...
متن کاملStatistical basis and outputs of stable isotope mixing models: Comment on Fry (2013)
Fry (2013; Mar Ecol Prog Ser 472:1−13) reviewed approaches to solving under determined stable isotope mixing systems, and presented a novel approach based on graphi cal summaries. He inaccurately characterized the statistics and interpretation of outputs from IsoSource and more recent Bayesian mixing model tools (e.g. SIAR, MixSIR), however, and as an alternative promoted an approach — not base...
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ژورنال
عنوان ژورنال: Environmetrics
سال: 2013
ISSN: 1180-4009
DOI: 10.1002/env.2221