An archaeological strontium isoscape for the prehistoric Andes: Understanding population mobility through a geostatistical meta-analysis of archaeological 87Sr/86Sr values from humans, animals, and artifacts
An archaeological strontium isoscape for the prehistoric Andes: Understanding population mobility through a geostatistical meta-analysis of archaeological 87Sr/86Sr values from humans, animals, and artifacts
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DOI：
10.1016/j.jas.2020.105121
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发表时间：
2020-05
影响因子：
2.8
通讯作者：
Beth K. Scaffidi;K. Knudson
中科院分区：
文献类型：
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作者：
Beth K. Scaffidi;K. Knudson
考古学和生物考古学中关于迁徙和流动性的生物地理研究依赖于通过基线研究或通过对给定地点的考古结果进行统计分析，准确地确定当地87Sr/86Sr范围的特征。然而，当基线材料很难获得或怀疑偏离史前同位素集水区时，考古数据可以提供对当地范围的准确描述。通过对来自45个出版物的考古人类、动物和文物样品(n=11658)的87Sr/86Sr值的空间荟萃分析，本研究旨在量化和比较生物可利用锶的变化，并建立史前安第斯山脉87Sr/86Sr值的第一个预测同位素模型(或等角图)。描述性统计数据，包括变异系数，在不同时间类别的站点之间以及沿海、云加斯和高原站点之间进行了比较。比较了人类牙釉质和骨样本，以及顺序形成的牙釉质和骨样本的男性和女性生物性别类别的87Sr/86Sr值的地区差异。研究发现，剔除离群值的考古数据集提供了一个可靠的局部范围模型。然而，我们警告说，当被调查的迁徙和贸易网络位于同类等景观区域内，或者在相邻的邻居之间，多个同位素特征应该被纳入物源估计中。
Biogeographical studies of migration and mobility in archaeology and bioarchaeology rely on accurately characterizing local87Sr/86Sr ranges, either through baseline studies or by statistically parsing archaeological results at a given site. However, when baseline materials are difficult to obtain or suspected to deviate from prehistoric isotopic catchments, archaeological data may provide an accurate characterization of local ranges. Through a spatial meta-analysis of87Sr/86Sr values from archaeological human, faunal, and artifact samples (n = 1658) from 45 publications, this study aims to quantify and compare variation in bioavailable strontium and create the first predictive isotope model (or isoscape) for87Sr/86Sr values in the prehistoric Andes. Descriptive statistics, including the coefficient of variation, are compared between sites from different temporal categories, and between coastal, yungas, and highland sites. Regional differences in the87Sr/86Sr values of male and female biological sex categories are compared for human enamel and bone samples, and between sequentially-forming enamel and bone samples. The study finds that the archaeological dataset trimmed of outliers provides a reliable model of local ranges. However, we caution that when migration and trade networks being investigated are within homogeneous isoscape regions, or between contiguous neighbors, multiple isotopic signatures should be incorporated into provenience estimations.