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Título: | Using MixSIAR to quantify mixed contributions of primary producers from amino acid δ15N of marine consumers |
Autor: | García Seoane, Rita; Viana, Inés G.; Bode, Antonio CSIC ORCID CVN | Palabras clave: | Amino acids Beta value Compound-specific isotope analysis Food web MixSIAR Nitrogen sources Trophic discrimination factor Trophic position |
Fecha de publicación: | ene-2023 | Editor: | Elsevier | Citación: | Marine Environmental Research 183 : 105792 (2023) | Resumen: | Estimations of the trophic position and the food web nitrogen baseline from compound-specific isotope analysis of individual amino acids (CSIA-AA) are challenged when the diet of consumer organisms relies on different proportions of vascular and non-vascular primary producers. Here we propose a method to infer such proportions using mixing models and the ¿15N CSIA-AA values from marine herbivores. Combining published and new data, we first characterized CSIA-AA values in phytoplankton, macroalgae and vascular plants, and determined their characteristic ß values (i.e. the isotopic difference between trophic and source AA). Then, we applied MixSIAR Bayesian isotope mixing models to investigate the transfer of these isotopic signals to marine herbivores (molluscs, green turtles, zooplankton and fish), and their utility to quantify autotrophic sources. We demonstrated that primary producer groups have distinct ¿15NAA fingerprints that can be tracked into their primary consumers, thus offering a rapid solution to quantify resource utilization and estimate ßmix values in mixed-sourced environments. | Versión del editor: | http://dx.doi.org/10.1016/j.marenvres.2022.105792 | URI: | http://hdl.handle.net/10261/340884 | DOI: | 10.1016/j.marenvres.2022.105792 | Identificadores: | doi: 10.1016/j.marenvres.2022.105792 issn: 0141-1136 e-issn: 1879-0291 |
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Seoane_Using MixSIAR to quantify mixed_2023.pdf | 1,28 MB | Adobe PDF | Visualizar/Abrir | |
1-s2.0-S0141113622002379-mmc1.docx | 1,26 MB | Microsoft Word XML | Visualizar/Abrir |
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