Reconstructing herbivore diets: a multivariate statistical approach to interpreting amino acid nitrogen isotope values.
Reconstructing herbivore diets: a multivariate statistical approach to interpreting amino acid nitrogen isotope values.
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重建草食动物饮食：解释氨基酸氮同位素值的多变量统计方法。
DOI：
10.1007/s00442-023-05320-1
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发表时间：
2023
期刊：
影响因子：
2.7
通讯作者：
Chen MHY
中科院分区：
文献类型：
--
作者：
Chen MHY
最近的研究表明，陆生植物的氨基酸（AA）δ 15 N值存在显著的变异性，区分植物类型（即，豆类种子、草、树叶）以及同一植物的组织。我们首次研究了不同AA的δ 15 N值之间的间距来区分植物类型的潜力，从而阐明它们在食草动物饮食中的相对重要性。使用主成分分析，我们表明，这是可能的，以区分五种植物类别-谷物，轴，豆类种子，草本植物，木本植物，其消费有不同的影响，了解草食动物生态和管理措施。此外，我们能够正确地分类草本植物饮食的现代牛使用AAδ 15 N值的牙齿牙本质调整营养丰富。考古遗址中野生和家养食草动物的AAδ 15 N模式似乎与主要由草本植物组成的饮食一致，但AAδ 15 N值在个体之间存在差异，这可能反映了其他植物类型的不同输入。AAδ 15 N值的变化不一定反映草食动物散装胶原蛋白δ 13 C和δ 15 N值的变化，表明AAδ 15 N值与单独的散装组织同位素值相比，有可能提供对植物膳食来源的额外见解。未来的工作应侧重于确定更广泛的陆生食草动物的营养富集因子和扩大初级生产者AAδ 15 N值库。
Recent studies have demonstrated that there exists significant variability in amino acid (AA)δ15N values of terrestrial plants, discriminating among plant types (i.e., legume seeds, grasses, tree leaves) as well as tissues of the same plant. For the first time, we investigate the potential of the spacing between theδ15N values of different AAs to differentiate between plant types and thus elucidate their relative importance in herbivore diet. Using principal component analysis, we show that it is possible to distinguish among five plant categories—cereal grains, rachis, legume seeds, herbaceous plants, and woody plants—whose consumption has different implications for understanding herbivore ecology and management practices. Furthermore, we were able to correctly classify the herbaceous plant diet of modern cattle using AAδ15N values of their tooth dentine adjusted for trophic enrichment. The AAδ15N patterns of wild and domestic herbivores from archaeological sites seem to be consistent with diets comprised predominantly of herbaceous plants, but there is variation in AAδ15N values among individuals that may reflect differing inputs of other plant types. The variation in AAδ15N values does not necessarily reflect the variation in herbivore bulk collagenδ13C andδ15N values, indicating that AAδ15N values have the potential to provide additional insights into plant dietary sources compared to bulk tissue isotope values alone. Future work should focus on defining trophic enrichment factors for a wider range of terrestrial herbivores and expanding libraries of primary producer AAδ15N values.