Data for the paper „Precipitation change and biomass allocation in a temperate grassland: the role of intraspecific variation and species composition change” by Vörös et al. Global Ecology and Conservation (2026)

The analyses of the data are published in the following article: https://doi.org/10.1016/j.gecco.2026.e04160Study descriptionIn this paper, we studied whether typical species of a semiarid grassland differ in their root mass fractions and if these species respond similarly to the between-year differences in precipitation with respect to root mass fraction.We also investigated the effect of four years of chronic precipitation manipulation (water addition, ambient precipitation, moderate drought, severe drought) on community-level root mass fraction.To assess whether drought-induced shift in species composition alone can explain changes in community-level root mass fraction, we compared the realised community-level root mass fraction of the experimental plots with the community weighted mean of species-specific root mass fractions, based on individuals sampled from ambient conditions.File Descriptionscom_plot_19.JUN.csv file stores community-level aboveground and belowground plant biomass data measured in the experimental plots.speciesRMF.csv contains aboveground and belowground biomass data of species. Based on individuals growing under ambient conditions.sps_plot_19.JUN.csv stores the cover of species (i.e., species that were measured for species-specific root mass fraction) in the experimental plots.本数据集的相关分析成果已发表于以下论文：https://doi.org/10.1016/j.gecco.2026.e04160 研究概况 本研究旨在探究半干旱草原典型物种的根质量分数（root mass fraction）是否存在种间差异，以及这些物种在根质量分数方面对年际降水波动的响应是否具有一致性。同时，本研究还考察了四年长期降水调控处理——包括增水处理、自然降水、中度干旱、重度干旱——对群落水平根质量分数的影响。 为明确仅由干旱引发的物种组成变化能否解释群落水平根质量分数的改变，我们基于自然环境下采集的植株个体数据，将实验样地的实际群落水平根质量分数，与物种特异性根质量分数的群落加权均值进行了对比。 文件说明 com_plot_19.JUN.csv 存储了实验样地中实测的群落水平地上与地下植物生物量数据。 speciesRMF.csv 包含了在自然环境下生长的植株的物种特异性地上与地下生物量数据。 sps_plot_19.JUN.csv 存储了实验样地中目标物种（即开展过物种特异性根质量分数测定的物种）的盖度数据。