Emery Matthew V, Stark Robert J, Murchie Tyler J, Elford Spencer, Schwarcz Henry P, Prowse Tracy L
Department of Anthropology, McMaster University, Hamilton, Ontario, L8S 4L9, Canada.
School of Geography and Earth Sciences, McMaster University, Hamilton, Ontario L8S 4K1, Canada.
Am J Phys Anthropol. 2018 Aug;166(4):837-850. doi: 10.1002/ajpa.23473. Epub 2018 Apr 18.
We obtained the oxygen and strontium isotope composition of teeth from Roman period (1st to 4th century CE) inhabitants buried in the Vagnari cemetery (Southern Italy), and present the first strontium isotope variation map of the Italian peninsula using previously published data sets and new strontium data. We test the hypothesis that the Vagnari population was predominantly composed of local individuals, instead of migrants originating from abroad.
We analyzed the oxygen ( O/ O) and strontium ( Sr/ Sr) isotope composition of 43 teeth. We also report the Sr/ Sr composition of an additional 13 molars, Sr/ Sr values from fauna (n = 10), and soil (n = 5) samples local to the area around Vagnari. The Sr/ Sr variation map of Italy uses Sr/ Sr values obtained from previously published data sources from across Italy (n = 199).
Converted tooth carbonate (δ O ) and Sr/ Sr data indicate that the majority of individuals buried at Vagnari were local to the region. ArcGIS bounded Inverse Distance Weighting (IDW) interpolation of the pan-Italian Sr/ Sr data set approximates the expected Sr/ Sr range of Italy's geological substratum, producing the first strontium map of the Italian peninsula.
Results suggest that only 7% of individuals buried at Vagnari were born elsewhere and migrated to Vagnari, while the remaining individuals were either local to Vagnari (58%), or from the southern Italian peninsula (34%). Our results are consistent with the suggestion that Roman Imperial lower-class populations in southern Italy sustained their numbers through local reproduction measures, and not through large-scale immigration from outside the Italian peninsula.
我们获取了埋葬在瓦尼亚里墓地（意大利南部）的罗马时期（公元1世纪至4世纪）居民牙齿的氧和锶同位素组成，并利用先前发表的数据集和新的锶数据绘制了意大利半岛首张锶同位素变化图。我们检验了这样一个假设，即瓦尼亚里人群主要由当地个体组成，而非来自国外的移民。
我们分析了43颗牙齿的氧（¹⁸O/¹⁶O）和锶（⁸⁷Sr/⁸⁶Sr）同位素组成。我们还报告了另外13颗磨牙的⁸⁷Sr/⁸⁶Sr组成、来自瓦尼亚里周边地区动物群（n = 10）和土壤（n = 5）样本的⁸⁷Sr/⁸⁶Sr值。意大利的⁸⁷Sr/⁸⁶Sr变化图使用了从意大利各地先前发表的数据来源获得的⁸⁷Sr/⁸⁶Sr值（n = 199）。
转化后的牙齿碳酸盐（δ¹⁸O）和⁸⁷Sr/⁸⁶Sr数据表明，埋葬在瓦尼亚里的大多数个体是该地区本地人。对全意大利⁸⁷Sr/⁸⁶Sr数据集进行的ArcGIS反距离加权（IDW）插值近似于意大利地质基底预期的⁸⁷Sr/⁸⁶Sr范围，从而绘制出了意大利半岛的首张锶图。
结果表明，埋葬在瓦尼亚里的个体中只有7%出生在其他地方并迁移到了瓦尼亚里，而其余个体要么是瓦尼亚里本地人（58%），要么来自意大利半岛南部（34%）。我们的结果与以下观点一致，即意大利南部罗马帝国的下层人口通过当地的生育措施维持其数量，而非通过从意大利半岛以外的大规模移民。
