DOI: 10.1038/317806A0
关键词:
摘要: Since its introduction in 19771, stable isotope analysis of bone collagen has been widely used to reconstruct aspects of prehistoric human and animal diets2–11. This method of dietary analysis is based on two well-established observations, and on an assumption that has never been tested. The first observation is that bone collagen 13C/12C and 15N/14N ratios reflect the corresponding isotope ratio of an animal's diet1–5, 12. The second is that groups of foods have characteristically different 13C/12C and/or 15N/14N ratios13, 14 …