Research on Middle Holocene hunter-gatherers from the Cis-Baikal region of Eastern Siberia has yielded many insights into their dietary and mobility patterns. A large dataset of stable carbon (δ¹³C) and nitrogen (δ¹⁵N) isotope values, when paired with freshwater-reservoir corrected carbon-14 dates, allows us to conduct fine-scale investigations into dietary change. Our Small Cemeteries Project has increased the sample of Late Neolithic (LN) Serovo individuals, and Ol'khon Island burials, allowing for new investigations into changes between the Serovo and subsequent Early Bronze Age (EBA) Glazkovo mortuary traditions in the Little Sea Microregion. This is important because research exploring the extent and nature of cultural continuity and change between these mortuary traditions has received less attention than more pronounced earlier transitions. We use stable isotope data from 134 adolescents and adults to explore (1) temporal changes in δ¹³C and δ¹⁵N values across the Serovo and Glazkovo mortuary traditions, and (2) differences in stable isotope values between individuals buried on Ol'khon Island vs. the Mainland. During Serovo times, Islanders and Mainlanders were eating somewhat different diets, with the former consuming more seal and the latter more shallow-water fish. Glazkovo Islanders maintained a broadly similar diet to their Serovo Islander predecessors suggesting the continued existence of a specialized group of Island seal hunters. After ~4100 calBP, and the arrival of the Glazkovo mortuary tradition in the Little Sea Microregion, there is the appearance of a new group of Mainlanders consuming a diet with low δ¹⁵N (≤ 14.6‰) and/or low δ¹³C (≤ ˗19.0‰) values unlike anything seen previously. This diet included less lake fish and seal and more terrestrial herbivores. Previous research has shown that many Mainland Glazkovo individuals with this new diet were non-local. Our study finds that just over half of Glazkovo Mainlanders have a low δ¹³C or δ¹⁵N value and they are found in all cemeteries with multiple individuals. This suggests such individuals, many of which were non-local, were fully incorporated into local social groups. Further increasing the sample of LN and Island individuals is needed to better establish these findings; nonetheless, our research highlights the diversity in Middle Holocene adaptive strategies in the Little Sea Microregion.

对西伯利亚东部顺贝加尔地区的中全新世狩猎采集者的研究已经对他们的饮食和活动方式产生了许多见解。一个大的数据集稳定碳（δ的¹³ C）和氮（δ ¹⁵N）同位素值与淡水储层校正的碳14日期配对时，使我们能够进行饮食变化的精细调查。我们的小公墓项目增加了新石器时代晚期（LN）的Serovo个人和Ol'khon岛墓葬的样本，从而可以对Serovo和随后的小海微区青铜时代（EBA）的Glazkovo mort葬传统之间的变化进行新的调查。这一点很重要，因为探索这些these房传统之间的文化连续性和变化的程度和性质的研究受到的关注要少于更明显的早期过渡。我们使用134名青少年和成人稳定同位素数据，探讨（1）在δ时间变化¹³ C和δ ¹⁵Serovo和Glazkovo太平间传统的N值，以及（2）埋藏在Ol'khon岛与大陆之间的个体之间稳定同位素值的差异。在塞罗沃时期，岛民和内地人的饮食有所不同，前者消耗的海豹较多，后者消耗的浅水鱼类较多。Glazkovo Islanders的饮食与Serovo Islander的前辈大致相似，这表明仍存在一支专门的海岛海豹猎人集团。〜4100 calBP，并在小海微区的Glazkovo停尸传统的到来之后，有内地的消耗低δ饮食的新组的外观¹⁵ N（≤14.6‰）和/或低δ ¹³C（≤9.019.0‰）值不同于以前看到的任何值。这种饮食包括更少的湖鱼和海豹以及更多的陆生食草动物。先前的研究表明，许多采用这种新饮食方法的内地格拉茨科沃人不是本地人。我们的研究发现，超过一半Glazkovo内地的具有低δ ¹³ C或δ ¹⁵ N值及它们与多个人，所有坟场发现。这表明，这些人（其中许多是非本地人）已完全融入本地社会群体。需要进一步增加LN和岛屿个人的样本，以更好地确定这些发现；尽管如此，我们的研究突出了小海微区中全新世的适应策略的多样性。