中 Holocene 南美贝堆中的饮食变化:来自同位素分析和适应的贝叶斯混合SIAR模型的见解
Marina Di Giusto1,2, André Fumis3, Murilo Bastos4
1CNRS, Géosciences Environnement Toulouse, Observatoire Midi Pyrénées, Toulouse, France.
PloS one
|December 3, 2025
概括
对巴西贝堆的饮食分析显示,在Piaçaguera有大量的海洋鱼类消费,在Moraes有陆地动物的使用. 同位素数据显示,埋葬群体之间的微妙饮食差异和莫雷斯亚成年人中较高的淡水鱼类摄入量.
科学领域:
- 考古学科学 考古学科学
- 古代饮食学研究
- 同位素地球化学 同位素地球化学
背景情况:
- 巴西贝山 (sambaqui) 种群的饮食的一致性受到争议.
- 同位素分析为记录群体内和群体之间饮食变异提供了潜在的可能性.
- 贝叶斯混合模型是用于饮食重建的定量工具.
研究的目的:
- 为了研究两个巴西的贝堆:Piaçaguera和Moraes的内部饮食变化.
- 应用和调整贝叶斯混合SIAR模型来整合骨和牙同位素数据.
- 为了重建桑巴奎种群的古饮食模式.
主要方法:
- 对人类和动物骨原蛋白和人类牙原蛋白中稳定同位素 (δ13C和δ15N) 的分析.
- 整合新的同位素数据与以前发表的巴西贝堆数据.
- 贝叶斯混合SIAR模型的调整,以结合多种原源并确保样本的独立性.
主要成果:
- 在Piaçaguera,海洋鱼类占饮食的30-50%;在Moraes,陆地动物占16-45%.
- 在Piaçaguera的埋葬群体之间观察到微小的饮食差异.
- 莫雷斯的亚成年人表现出更高的淡水鱼类消费.
- 新的放射性碳年代测定证实了Piaçaguera的同时代埋葬团体.
结论:
- 巴西的贝堆种群的饮食模式并不统一.
- 经过调整的MixSIAR模型有效地划分了古饮食模式.
- 考古学和同位素数据的整合对于对过去饮食的可靠解释至关重要.
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