Keys to the global treeline formation: thermal limit for its position and moisture for the taxon-specific variation

Process datasets and R codes for "Keys to the global treeline formation: thermal limit for its position and moisture for the taxon-specific variation".In the "data" folder:Treeline_taxa. csv: core analytical data, conducted based on the dataset of over 2,000 treeline species records, including the extraction of required environmental indicators and PCA-based environmental dimension scores from the original treeline locations and species records.ALL_Genus_GBIF. csv: the global occurrence records of all treeline species found in the GBIF database (as of January 2024), including the extraction of required environmental indicators.TL_and_GBIF_PCA. csv: the integration of treeline point data and their respective global occurrence records in GBIF, including the extraction of required environmental indicators and PCA-based environmental dimension scores from the original treeline locations and species records.pts_around_TL. csv: the sample point data constructed within the buffer zone around the treeline points for analysis using the Generalized Linear Mixed Model. including the extraction of required environmental indicators.pts_around_TL_PCA_RDO. csv: the sample point data constructed within the buffer zone around the treeline points as the dataset above. including the extraction of required environmental indicators, PCA-based environmental dimension scores and the RDO value at both genus and species levels.mountain_stat. csv: summary statistics at the mountain scale.RDO threshold point_genus. csv: intermediate results of genus-level RDO threshold calculation.Treeline_taxa_3theoretical_thres. csv: based on "Treeline_taxa. csv", integrates the potential treeline elevation defined by growing season temperature for each treeline point, elevation of the growth boundary defined by the ecological niche model, and the theoretical treeline elevation defined by the RDO.Tree_TLSP. tre: phylogenetic tree of all species.Tree_TLSP_GENUS. tre: phylogenetic tree at genus level.RDO_treeline_raster_pts folder: point shapefile for calculation theoretical treeline elevation defined by the RDO.RDO-defind folder: results for theoretical treeline elevation defined by the RDO for each genus.maxent_result folder: results for ecological niche model for each genus.potential treeline range. tif: potential treeline range defined by growing season temperature.<br>