Compound-specific amino acid isotopic proxies for distinguishing between terrestrial and aquatic resource consumption
Compound-specific amino acid isotopic proxies for distinguishing between terrestrial and aquatic resource consumption
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DOI：
10.1007/s12520-015-0309-5
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发表时间：
2018-02
影响因子：
2.2
通讯作者：
E. Webb;Noah V. Honch;P. Dunn;Anna Linderholm;Gunilla Eriksson;K. Lidén;R. Evershed
中科院分区：
文献类型：
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作者：
E. Webb;Noah V. Honch;P. Dunn;Anna Linderholm;Gunilla Eriksson;K. Lidén;R. Evershed
化合物特异性氨基酸碳同位素组成已显示出在复杂环境背景下阐明饮食行为的特别前景，并且也可能能够减轻古饮食重建所固有的许多限制的影响。在这里，我们调查化合物特异性氨基酸同位素代理的功效，在表征不同的膳食蛋白质来源的消费使用氨基酸碳同位素组成的人类和动物从Rössberga（早期到中期新石器时代），Köpingsvik（中石器时代和中期新石器时代），和维斯比（中世纪时期），瑞典。我们还评估了同位素混合模型的解释能力，当使用人类和当地动物的必需氨基酸碳同位素组成。所有三个同位素代理人之间的区别，从三个网站一致和信息，并能够提高广泛的解释使用散装同位素组成。混合模型palaeodietary重建显示相当大的多样性，相对蛋白质来源的贡献之间的个人在Köpingsvik和维斯比。比较散装的碳和氮同位素组成的混合模型的模型的必需氨基酸同位素组成的进一步证明了低估和高估的可能性海洋蛋白质的消耗水生为主的和混合的海洋-陆地饮食时，使用散装同位素组成。
Compound-specific amino acid carbon-isotope compositions have shown particular promise for elucidating dietary behaviors in complex environmental contexts, and may also be able to mitigate the effect of many of the limitations inherent to palaeodietary reconstructions. Here, we investigate the efficacy of compound-specific amino acid isotopic proxies in characterizing the consumption of different dietary protein sources using amino acid carbon-isotope compositions for humans and fauna from Rössberga (Early to Middle Neolithic), Köpingsvik (Mesolithic and Middle Neolithic), and Visby (Medieval Period), Sweden. We also assess the explanatory capabilities of an isotopic mixing model when used with essential amino acid carbon-isotope compositions of humans and local fauna. All three isotopic proxies distinguished among humans from the three sites consistently and informatively, and were able to enhance the broad interpretations made using bulk isotopic compositions. The mixing model palaeodietary reconstruction revealed considerable diversity in relative protein source contributions among individuals at both Köpingsvik and Visby. Comparing the mixing model for bulk carbon- and nitrogen-isotope compositions to the model for essential amino acid isotopic compositions further demonstrated the likelihood of underestimation and overestimation of marine protein consumption for both aquatic-dominant and mixed marine-terrestrial diets when using bulk isotopic compositions.