Inferences about how an ecosystem has changed through time often rely on longitudinal records of species characteristics or niche parameters, and stable isotope analysis is a common tool employed to study changes in an organism’s niche. One of the most frequently used stable isotope measures is δ13C, a ratio of 13C to 12C. However, applying δ13C to historical samples comes with some methodological hurdles. One such hurdle is correcting for the 13C Suess effect or the change in atmospheric δ13C due to increased anthropogenic CO2 emissions. The change in the amount of carbon isotopes in the atmosphere through time can confound the study of historical shifts in species characteristics. No standard way of correcting for the 13C Suess effect has been suggested despite this problem. Here, I propose a standard 13C Suess correction model for the past ~1000 years using three prehistoric/historic records of atmospheric δ13C.

中文翻译：

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用于研究过去生态系统的约 1000 年 13C Suess 校正模型

关于生态系统如何随时间变化的推论通常依赖于物种特征或生态位参数的纵向记录，稳定同位素分析是研究生物体生态位变化的常用工具。最常用的稳定同位素测量之一是 δ13C，即 13C 与 12C 的比率。然而，将 δ13C 应用于历史样本会带来一些方法上的障碍。其中一个障碍是校正 13C Suess 效应或由于人为 CO2 排放增加导致的大气 δ13C 变化。大气中碳同位素数量随时间的变化可能会混淆对物种特征历史变化的研究。尽管存在这个问题，但没有提出校正 13C Suess 效应的标准方法。这里，