Stable isotopes of the endangered turtle Dermatemys mawii, fish, and basal resources in an oxbow lake, Mexico

This dataset contains stable isotope ratios (d13C and d15N) for the critically endangered Central American river turtle (Dermatemys mawii), dominant fish species, and potential basal resources collected from an oxbow lake in the Usumacinta River Basin, Mexico. The data includes isotopic values categorized by age and sex for D. mawii, as well as signatures for primary producers such as aquatic macrophytes (e.g., Pistia stratiotes), riparian plants, and seston. These data were used to analyze inter- and intraspecific trophic relationships, niche partitioning, and energy pathways within the aquatic community. This data supports the findings published in 'Stable isotope analysis reveals inter- and intraspecific trophic relationships of the endangered Central American river turtle in southern Mexico' (Limnologica, 2025).本数据集涵盖采自墨西哥乌苏马辛塔河流域某牛轭湖的极危（critically endangered）中美洲河龟（Dermatemys mawii）、优势鱼类物种及潜在基础资源的稳定同位素比值（stable isotope ratios，即d¹³C与d¹⁵N）。该数据集包含中美洲河龟按年龄与性别分类的同位素值，以及水生大型植物（aquatic macrophytes，如大薸Pistia stratiotes）、河岸植物与浮游碎屑（seston）等初级生产者的同位素特征。本数据集被用于解析水生群落内的种间与种内营养关系、生态位分化及能量通路，其支撑了发表于《湖沼学（Limnologica）》2025年的论文《稳定同位素分析揭示墨西哥南部濒危中美洲河龟的种间与种内营养关系》中的研究结论。