科研之友
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摘要
This study examines the diet consumed by the population at the neighborhood center of Teopancazco, Teotihuacan, in the basin of Mexico. We used stable isotope analysis of delta 13C and delta 15N of the dentine collagen as well as the delta 13C from enamel bioapatite from teeth (M2 and M3) of 39 of excavated burials. The results show that the diet consumed by the majority of the population during childhood and adolescence had high 13C enriched values in both dietary components: delta 13C enamel_bioapatite = -2.0 parts per thousand +/- 1.5 for the whole diet and delta 13C dentine_collagen = - 9.4 parts per thousand +/- 2.1 for the protein component. According to the bi-variable and multivariable models, some individuals consumed higher amounts of C4/CAM resources than those specified in cluster #2 (70 % C4 diet; >= 50 % C4/CAM protein). An inter-tissue adjustment of 2.3 parts per thousand was used to relate the enamel bioapatite data to the bone bioapatite of the models. Average delta 15Ndentine_collagen was 10.2 parts per thousand +/- 2.8 with high variability especially for four individuals, three of which belong to special burials, suggesting different access to meat or marine products due to their social or migration status and/or to pathological conditions. The data suggest that maize was the staple crop of the population not only at Teopancazco but for Teotihuacan as a whole, in the form of tortillas, tamales, atole, and protein from maize-fed animals with the inclusion of other CAM, C4, and C3 resources probably from the bountiful ecosystem of the basin of Mexico or from the wide trade system that Teotihuacan had with Mesoamerica.
- 出版日期2017-2
