Document Type
Article
Publication Date
4-2021
Abstract
- Stable hydrogen and oxygen isotopic compositions (δ2H and δ18O, respectively) of animal tissues have been used to infer geographical origin or mobility based on the premise that the isotopic composition of tissue is systematically related to that of local water sources. Isotopic data for known-origin samples are required to quantify these tissue–environment relationships. Although many of such data have been published and could be reused by researchers, differences in the standards used for calibration and analytical procedures for different datasets limit the comparability of these data.
- We develop an algorithm that uses results from comparative analysis of secondary standards to transform data among reference scales and estimate the uncertainty inherent in these transformations. We apply the algorithm to a compilation of known-origin keratin data published over the past ~20 years.
- We show that transformation improves the comparability of data from different laboratories, and that the transformed data suggest ecophysiologically meaningful differences in keratin–water relationships among different animal groups and taxa.
- The compiled data and algorithms are freely available in the ASSIGNR r-package to support geographical provenance research, and more generally offer a methodology overcoming several challenges in geochemical data integration and reuse.
Recommended Citation
Magozzi, Sarah, Clement P. Bataille, Keith A. Hobson, Michael B. Wunder, John D. Howa, Andrea Contina, Hannah B. Vander Zanden, and Gabriel J. Bowen. "Calibration chain transformation improves the comparability of organic hydrogen and oxygen stable isotope data." Methods in Ecology and Evolution 12, no. 4 (2021): 732-747. https://doi.org/10.1111/2041-210X.13556
Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.
Publication Title
Methods in Ecology and Evolution
DOI
https://doi.org/10.1111/2041-210X.13556
Comments
© 2021 The Authors. Methods in Ecology and Evolution published by John Wiley & Sons Ltd on behalf of British Ecological Society
This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.