Isotopic, Morphological, and Environmental Dataset for Eriosyce Cacti

This dataset assembles coordinated isotopic, morphological, geographic, and environmental information for Eriosyce cacti sampled along a 1200-km transect spanning the arid to hyperarid zones of the Atacama Desert. The database integrates individual-level root water isotope measurements (δ¹⁸O, δ²H, D-excess), root architectural traits, and georeferenced climate and topographic covariates. It is designed to support analyses of hydrological niche differentiation, root functional adaptations, and eco-evolutionary responses to extreme moisture limitation. The decimal components of the latitude coordinates were removed to protect the species from extraction and illegal trafficking. 1_Eriosyce_data.csv — Individual isotopic, morphological, geographic and climatic data for all sampled plants. 2_Fibrous.csv — Isotopic niche metrics for fibrous-root populations. 3_Taproot.csv — Isotopic niche metrics for taproot populations. 4_Tuberous.csv — Isotopic niche metrics for tuberous-root populations. Eriosyce_spp.csv — Species-level δ18O, δ2H and D-excess records. Map.csv — Coordinates and IDs of sampled populations. water_sources.csv — Combined isotopic data for fog, rainfall and snow. sources_Fog.csv — Fog-water isotopic measurements. sources_Precipitation_Snow.csv — Rain and snow isotopic measurements. tef.csv — TEF parameters for MixSIAR. Eriosyce_North.tre — Phylogenetic tree for PGLS analyses. 1_MixSiar_Eriosyce.R — Script for MixSIAR water-source models. ANOVA.R — Script for isotopic ANOVA tests. Distribution_Eriosyce.R — Script for spatial distribution plots. LMWL vs GMWL.R — Script for meteoric and fog water line calculations. PGLS_Eriosyce.R — Script for phylogenetic regression analyses.