人类头发和自来水中的氧和氢同位素:现代墨西哥人口的建模关系

4区 生物学 Q2 Medicine
Chelsey A Juarez, R. Ramey, David T. Flaherty, Belinda S. Akpa
{"title":"人类头发和自来水中的氧和氢同位素:现代墨西哥人口的建模关系","authors":"Chelsey A Juarez, R. Ramey, David T. Flaherty, Belinda S. Akpa","doi":"10.1353/hub.2017.0054","DOIUrl":null,"url":null,"abstract":"This study investigated the relationship between <sup>18</sup>O and <sup>2</sup>H isotopes in samples of Mexican hair and drinking water. The purpose of this study was twofold: to quantify the relationship between isotopes in Mexican hair and tap water, in order to understand the impact of water stress and differing socioeconomic status on accurate predictions of drinking water; and to determine whether currently existing semimechanistic models can accurately represent the relationship between hair and tap water. This study used a subset of paired samples of human hair (<em>n</em> = 62) and tap water (<em>n</em> = 76). Isotope values in tap water ranged from –11.4‰ to –4.3‰ and –79.1‰ to –22.5‰, and in hair from +9.5‰ to +16.1‰ and –90.8‰ to –53.7‰, for δ<sup>18</sup>O and δ<sup>2</sup>H, respectively. The most depleted δ<sup>18</sup>O and δ<sup>2</sup>H hair values came from individuals in the state of Morelos. For modern Mexican populations, positive correlations between isotopes in hair and water were not significant, with correlation coefficients <em>r</em> = 0.61 (<em>p</em> = 0.05) and <em>r</em> = 0.60 (<em>p</em> = 0.06) for <sup>18</sup>O and <sup>2</sup>H, respectively. Error-in-variables regression yielded linear fits that were somewhat better for <sup>2</sup>H relative to <sup>18</sup>O: δ<sup>18</sup>O<sub>h</sub> = 0.183 [±0.132] δ<sup>18</sup>O<sub>tw</sub> + 15.7 [±0.9]‰ (r<sup>2</sup> = 0.23); δ<sup>2</sup>H<sub>h</sub> = 0.181 [±0.076] δ<sup>2</sup>H<sub>tw</sub> – 64.0 [±3.0]‰ (r<sup>2</sup> = 0.34). In short, data from this Mexican population did not exhibit the strong relationships between isotope values of <sup>18</sup>O and <sup>2</sup>H in tap water and hair that have been characteristic of other populations studied to date. Given the economic stratification of this region and the poor correlation between hair and water samples, the authors considered the possibility that <em>l</em>, the fraction of the diet derived from local sources, and <em>f</em><sub>s</sub>, the fraction of nonexchangeable H in keratin that was fixed in vivo, are local rather than global parameters for this population. The authors estimated different values of <em>l</em> and <em>f</em><sub>s</sub> for each location. Given the anticipated importance of the nonlocal dietary contribution, they treated the isotopic content of nonlocal food and the offset parameters for predicting isotopes in locally derived food as tuning parameters and compared the results with parameters based on the American supermarket diet. They found that, although O and H isotopes in water and hair maintained similar geographic distributions, O and H isotopes in tap water explained only a small part of the variation observed in hair samples. Compared to the standard American supermarket diet, the Mexican estimates for nonlocal diet and local diet offsets predicted regional distributions of <em>l</em> and <em>f</em><sub>s</sub> that cleanly segregated urban areas from rural towns.","PeriodicalId":13053,"journal":{"name":"Human Biology","volume":"243 1","pages":"-"},"PeriodicalIF":0.0000,"publicationDate":"2019-05-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Oxygen and Hydrogen Isotopes in Human Hair and Tap Water: Modeling Relationships in a Modern Mexican Population\",\"authors\":\"Chelsey A Juarez, R. Ramey, David T. Flaherty, Belinda S. Akpa\",\"doi\":\"10.1353/hub.2017.0054\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"This study investigated the relationship between <sup>18</sup>O and <sup>2</sup>H isotopes in samples of Mexican hair and drinking water. The purpose of this study was twofold: to quantify the relationship between isotopes in Mexican hair and tap water, in order to understand the impact of water stress and differing socioeconomic status on accurate predictions of drinking water; and to determine whether currently existing semimechanistic models can accurately represent the relationship between hair and tap water. This study used a subset of paired samples of human hair (<em>n</em> = 62) and tap water (<em>n</em> = 76). Isotope values in tap water ranged from –11.4‰ to –4.3‰ and –79.1‰ to –22.5‰, and in hair from +9.5‰ to +16.1‰ and –90.8‰ to –53.7‰, for δ<sup>18</sup>O and δ<sup>2</sup>H, respectively. The most depleted δ<sup>18</sup>O and δ<sup>2</sup>H hair values came from individuals in the state of Morelos. For modern Mexican populations, positive correlations between isotopes in hair and water were not significant, with correlation coefficients <em>r</em> = 0.61 (<em>p</em> = 0.05) and <em>r</em> = 0.60 (<em>p</em> = 0.06) for <sup>18</sup>O and <sup>2</sup>H, respectively. Error-in-variables regression yielded linear fits that were somewhat better for <sup>2</sup>H relative to <sup>18</sup>O: δ<sup>18</sup>O<sub>h</sub> = 0.183 [±0.132] δ<sup>18</sup>O<sub>tw</sub> + 15.7 [±0.9]‰ (r<sup>2</sup> = 0.23); δ<sup>2</sup>H<sub>h</sub> = 0.181 [±0.076] δ<sup>2</sup>H<sub>tw</sub> – 64.0 [±3.0]‰ (r<sup>2</sup> = 0.34). In short, data from this Mexican population did not exhibit the strong relationships between isotope values of <sup>18</sup>O and <sup>2</sup>H in tap water and hair that have been characteristic of other populations studied to date. Given the economic stratification of this region and the poor correlation between hair and water samples, the authors considered the possibility that <em>l</em>, the fraction of the diet derived from local sources, and <em>f</em><sub>s</sub>, the fraction of nonexchangeable H in keratin that was fixed in vivo, are local rather than global parameters for this population. The authors estimated different values of <em>l</em> and <em>f</em><sub>s</sub> for each location. Given the anticipated importance of the nonlocal dietary contribution, they treated the isotopic content of nonlocal food and the offset parameters for predicting isotopes in locally derived food as tuning parameters and compared the results with parameters based on the American supermarket diet. They found that, although O and H isotopes in water and hair maintained similar geographic distributions, O and H isotopes in tap water explained only a small part of the variation observed in hair samples. Compared to the standard American supermarket diet, the Mexican estimates for nonlocal diet and local diet offsets predicted regional distributions of <em>l</em> and <em>f</em><sub>s</sub> that cleanly segregated urban areas from rural towns.\",\"PeriodicalId\":13053,\"journal\":{\"name\":\"Human Biology\",\"volume\":\"243 1\",\"pages\":\"-\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2019-05-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Human Biology\",\"FirstCategoryId\":\"99\",\"ListUrlMain\":\"https://doi.org/10.1353/hub.2017.0054\",\"RegionNum\":4,\"RegionCategory\":\"生物学\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q2\",\"JCRName\":\"Medicine\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Human Biology","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.1353/hub.2017.0054","RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"Medicine","Score":null,"Total":0}
引用次数: 0

摘要

本研究调查了墨西哥头发和饮用水样品中18O和2H同位素之间的关系。这项研究的目的有两个:量化墨西哥头发和自来水中同位素之间的关系,以便了解水压力和不同社会经济地位对饮用水准确预测的影响;并确定目前现有的半力学模型是否能准确地代表头发和自来水之间的关系。这项研究使用了人类头发(n = 62)和自来水(n = 76)的配对样本子集。自来水中δ18O和δ2H的同位素值分别为-11.4‰~ -4.3‰和-79.1‰~ -22.5‰,头发中δ18O和δ2H的同位素值分别为+9.5‰~ +16.1‰和-90.8‰~ -53.7‰。最耗尽的δ18O和δ2H值来自莫雷洛斯州的个体。在现代墨西哥人群中,头发和水中的同位素之间的正相关不显著,在18O和2H的相关系数分别为r = 0.61 (p = 0.05)和r = 0.60 (p = 0.06)。变量误差回归显示2H相对于18O有更好的线性拟合:δ18Oh = 0.183[±0.132]δ18Otw + 15.7[±0.9]‰(r2 = 0.23);δ2 hh = 0.181(±0.076)δ2 htw - 64.0(±3.0)‰(r2 = 0.34)。简而言之,来自墨西哥人口的数据并没有显示自来水中18O和2H的同位素值与头发之间的强烈关系,而这是迄今为止研究的其他人口的特征。考虑到该地区的经济分层以及头发和水样之间的相关性较差,作者认为,l(来自当地来源的饮食比例)和fs(体内固定的角蛋白中不可交换H的比例)可能是该人群的局部参数,而不是全局参数。作者估计了每个位置的l和fs的不同值。考虑到非本地饮食贡献的预期重要性,他们将非本地食物的同位素含量和用于预测本地衍生食物同位素的偏移参数作为调整参数,并将结果与基于美国超市饮食的参数进行比较。他们发现,尽管水和头发中的O和H同位素保持着相似的地理分布,自来水中的O和H同位素只能解释头发样本中观察到的一小部分差异。与标准的美国超市饮食相比,墨西哥对非本地饮食和本地饮食抵消的估计预测了l和fs的区域分布,将城市地区与农村城镇清晰地隔离开来。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Oxygen and Hydrogen Isotopes in Human Hair and Tap Water: Modeling Relationships in a Modern Mexican Population
This study investigated the relationship between 18O and 2H isotopes in samples of Mexican hair and drinking water. The purpose of this study was twofold: to quantify the relationship between isotopes in Mexican hair and tap water, in order to understand the impact of water stress and differing socioeconomic status on accurate predictions of drinking water; and to determine whether currently existing semimechanistic models can accurately represent the relationship between hair and tap water. This study used a subset of paired samples of human hair (n = 62) and tap water (n = 76). Isotope values in tap water ranged from –11.4‰ to –4.3‰ and –79.1‰ to –22.5‰, and in hair from +9.5‰ to +16.1‰ and –90.8‰ to –53.7‰, for δ18O and δ2H, respectively. The most depleted δ18O and δ2H hair values came from individuals in the state of Morelos. For modern Mexican populations, positive correlations between isotopes in hair and water were not significant, with correlation coefficients r = 0.61 (p = 0.05) and r = 0.60 (p = 0.06) for 18O and 2H, respectively. Error-in-variables regression yielded linear fits that were somewhat better for 2H relative to 18O: δ18Oh = 0.183 [±0.132] δ18Otw + 15.7 [±0.9]‰ (r2 = 0.23); δ2Hh = 0.181 [±0.076] δ2Htw – 64.0 [±3.0]‰ (r2 = 0.34). In short, data from this Mexican population did not exhibit the strong relationships between isotope values of 18O and 2H in tap water and hair that have been characteristic of other populations studied to date. Given the economic stratification of this region and the poor correlation between hair and water samples, the authors considered the possibility that l, the fraction of the diet derived from local sources, and fs, the fraction of nonexchangeable H in keratin that was fixed in vivo, are local rather than global parameters for this population. The authors estimated different values of l and fs for each location. Given the anticipated importance of the nonlocal dietary contribution, they treated the isotopic content of nonlocal food and the offset parameters for predicting isotopes in locally derived food as tuning parameters and compared the results with parameters based on the American supermarket diet. They found that, although O and H isotopes in water and hair maintained similar geographic distributions, O and H isotopes in tap water explained only a small part of the variation observed in hair samples. Compared to the standard American supermarket diet, the Mexican estimates for nonlocal diet and local diet offsets predicted regional distributions of l and fs that cleanly segregated urban areas from rural towns.
求助全文
通过发布文献求助,成功后即可免费获取论文全文。 去求助
来源期刊
Human Biology
Human Biology 生物-生物学
CiteScore
1.90
自引率
0.00%
发文量
88
审稿时长
>12 weeks
期刊介绍: Human Biology publishes original scientific articles, brief communications, letters to the editor, and review articles on the general topic of biological anthropology. Our main focus is understanding human biological variation and human evolution through a broad range of approaches. We encourage investigators to submit any study on human biological diversity presented from an evolutionary or adaptive perspective. Priority will be given to interdisciplinary studies that seek to better explain the interaction between cultural processes and biological processes in our evolution. Methodological papers are also encouraged. Any computational approach intended to summarize cultural variation is encouraged. Studies that are essentially descriptive or concern only a limited geographic area are acceptable only when they have a wider relevance to understanding human biological variation. Manuscripts may cover any of the following disciplines, once the anthropological focus is apparent: human population genetics, evolutionary and genetic demography, quantitative genetics, evolutionary biology, ancient DNA studies, biological diversity interpreted in terms of adaptation (biometry, physical anthropology), and interdisciplinary research linking biological and cultural diversity (inferred from linguistic variability, ethnological diversity, archaeological evidence, etc.).
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信