Chen et al. (1) conclude that “the extraction error-corrected result tends to nullify support for ecohydrological separation as a globally widespread phenomenon” based on an extrapolation of results from a carefully designed experiment under controlled conditions. The extrapolation was performed using global precipitation offset data (2) compiled from field-based studies that showed “widespread occurrence of ecohydrological separation.” The precipitation offset describes the difference in the isotopic composition of groundwater, stream water, soil water, and xylem water from that of local (i.e., context-specific) precipitation, which has a precipitation offset of zero. However, the conclusion in Chen et al.’s reanalysis is not supported with context-specific statistical analysis, which, in turn, was the basis for the conclusion in the original study (2).

中文翻译：

---

对早期研究的茎水低温提取实验的影响没有得到稳健的特定背景统计评估的支持 [生物科学]

陈等人。( 1 ) 基于对受控条件下精心设计的实验结果的推断，得出“提取误差校正结果倾向于使生态水文分离作为全球普遍现象的支持无效”。外推是使用全球降水偏移数据进行的（2) 由实地研究汇编而成，这些研究表明“生态水文分离的广泛发生”。降水偏移量描述了地下水、河流水、土壤水和木质部水的同位素组成与局部（即特定环境）降水的同位素组成的差异，后者的降水偏移量为零。然而，Chen 等人再分析中的结论并没有得到特定背景统计分析的支持，而这反过来又是原始研究得出结论的基础 ( 2 )。