Sclerochronological stable isotope dataset and R-based analysis report for Early Pleistocene Viviparus gastropods from Kos Island, Eastern Mediterranean

This repository contains the sclerochronological stable isotope dataset and rendered R Markdown analysis report associated with the study “Seasonal variability during the Gelasian–Calabrian transition recorded by sclerochronological stable isotopes in lacustrine gastropods (Kos, Greece, Eastern Mediterranean)”. The dataset comprises high-resolution intra-shell δ¹⁸O and δ¹³C measurements from 21 Viviparus gastropod shells collected from six stratigraphically successive lacustrine units of the Early Pleistocene Kos palaeolake succession (Greece). A total of 2,271 microsamples were analysed to reconstruct seasonal hydroclimatic variability across the Gelasian–Calabrian transition. The rendered HTML report documents the R-based data processing, statistical analyses, and visualization workflow, including calculations of robust intra-annual δ¹⁸O ranges, isotope variability metrics, δ¹⁸O–δ¹³C relationships, etc. and the generation of figures presented in the manuscript and supplementary material.本仓库收录了与研究《湖相腹足类壳体年代学（sclerochronological）稳定同位素记录的格拉斯阶-卡拉布里亚阶过渡期季节变化（希腊东地中海科斯岛）》相关的壳体年代学稳定同位素数据集与渲染完成的R Markdown分析报告。 本数据集涵盖采自希腊早更新世科斯古湖沉积序列6个地层连续湖相单元的21个田螺属（Viviparus）腹足类壳体的高分辨率壳内δ¹⁸O与δ¹³C测量数据。共计分析2271个微样品，以重建格拉斯阶-卡拉布里亚阶过渡期的季节性水文气候变化。 本渲染完成的HTML报告详述了基于R语言的数据处理、统计分析与可视化工作流程，包括稳健年内δ¹⁸O变化范围的计算、同位素变化指标的测算、δ¹⁸O–δ¹³C相关性分析等内容，以及论文手稿与补充材料中所用图表的生成过程。