Tree-Ring Chronologies and Xylem Geochemical Time-Series of Pinus yunnanensis Across an Alpine Carbonatite-Hosted REE Gradient

This open-access repository contains the raw empirical datasets supporting the spatiotemporal causality analysis of biogeochemical forcing on alpine forest ecosystems. Dataset_S1_Xylem_Geochemical_Concentrations_ppb.csv: Contains high-resolution annual absolute concentrations (measured in parts per billion (ppb)) of 19 targeted geochemical elements (Sc, La, Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu, Rh, Pb, As, Cd) derived from community-level composite xylem samples spanning 1994–2024 (N = 124 observations). Dataset_S2_Raw_TreeRing_Widths_Trees.csv: Contains raw tree-ring width chronologies (measured with a precision of 1 μm) for 44 individual Pinus yunnanensis trees sampled across four continuous observational zones (Zone 1: Treated, N = 9; Zones 2–4: Control, N = 35), representing the elevation gradient (2,157–3,081 m a.s.l.) of localized sampling plots.