zhxianliang/Hydraulic-Trait-Governs-Opposing-Range-Shifts-of-Montane-Trees-Under-Warming: Hydraulic Traits Governs Opposing Range Shifts of Montane Trees Under Warming

Hydraulic Trait Governs Opposing Range Shifts of Montane Trees Under Warming Repository Overview This repository contains all scripts used to generate the analyses and figures presented in the manuscript: Hydraulic Trait Governs Opposing Range Shifts of Montane Trees Under Warming The study investigates how hydraulic traits regulate species-specific elevational range shifts across global mountain forests under recent climate warming. Using tree-ring records, climatic data, hydraulic trait databases, and species distribution information, we quantify: species-specific climate sensitivity; elevational variation in climate-growth relationships; hydraulic controls on climate adaptation; hydraulic determinants of range-shift rates. Scientific Background Mountain ecosystems are experiencing rapid warming and widespread redistribution of species. Although upslope migration is often expected, observed responses vary substantially among species, with some species expanding upslope while others show limited movement or even downslope shifts. Functional traits are increasingly recognized as important predictors of these heterogeneous responses. This study evaluates whether hydraulic traits provide a mechanistic explanation for these contrasting range-shift responses. Required packages: ggplot2 tidyverse reshape2 openxlsx readxl plantlist FactoMineR factoextra ggrepel patchwork R.matlab MATLAB Version ≥ R2022a Required toolboxes: Mapping Toolbox Statistics and Machine Learning Toolbox Reproducibility Statement All figures reported in the manuscript can be reproduced directly using the scripts provided in this repository after updating local file paths to the corresponding datasets. Code Availability All code necessary to reproduce the analyses and figures is publicly available in this repository. Citation If you use these scripts or derived products, please cite: Zhang X., et al. Hydraulic Trait Governs Opposing Range Shifts of Montane Trees Under Warming. Nature Climate Change (Accepted). Contact Xianliang Zhang Faculty of Forestry, University of British Columbia College of Forestry, Hebei Agricultural University Email: zhxianliang85@gmail.com