Variations in human body water isotope composition across the United States
| Autor: | Shannon P. O'Grady, James R. Ehleringer, Luciano O. Valenzuela |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Adult
Male Body water Oxygen Isotopes Models Biological Pathology and Forensic Medicine Fluid intake Animal science Body Water Water model Humans Cities Community level Biological Variation Individual Isotope Stable isotope ratio Drinking Water Biogeochemistry Middle Aged Deuterium United States Biological Variation Population Body Composition Environmental science Composition (visual arts) Female Law |
| Zdroj: | Forensic science international. 327 |
| ISSN: | 1872-6283 |
| Popis: | Accurate human provenancing using stable isotopes depends directly on solid understandings of the geographic and individual factors affecting isotope variability and incorporation into human tissues. Transfer of isotopic, and therefore spatial, information between environmental water and biological tissues is mediated by the isotopic composition of body water. Thus, there is a need to study body water isotope ratios at a population level and over a large isotopic and geographic range. We evaluated oxygen (δ18Obw) and hydrogen (δ2Hbw) isotope values of body water from 72 volunteers in 10 different cities across the US, and over a 5-10-day period. We analyzed covariates (e.g., water intake, physical activity, biometrics, gender) that might explain individual stable isotope ratio variations and tested a predictive model that incorporates the δ-values of drinking water, food, and O2 as well as individual variables to predict the δ-values of body water. The individual variability in body water isotope values overtime (mean 0.3‰ for δ18Obw and 2.3‰ for δ2Hbw) was lower than the intra-city variability (mean 0.9‰ for δ18Obw and 6.9‰ for δ2Hbw). Body water isotope values differed among cities (ANOVA: δ18ObwF = 97.2, p |
| Databáze: | OpenAIRE |
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