https://doi.org/10.5061/dryad.tqjq2bw8f

Description of the data and file structure

Aim: We examined whether tree mortality related to hot-drought is predominantly occurring in niche edge or niche core populations and assessed whether mortality patterns in niche space are consistent with species drought tolerance.

Methods: We estimated species climatic niche based on global occurrences and annual time series of climate and compared it with a null model of random distribution of tree mortality. We assessed how loss of xylem conductance and hydraulic safety margin relate to position in niche space (marginality-centrality) and to the degree of climate anomaly during mortality.

Files and variables

File: Species_Conservation_Status_IUCN.pdf

Description: Conservation status of the species included in the drought-mortality analysis. Note that for all species with a conservation status within Conservation concern, Endangered, Near Threatened, and Vulnerable (highlighted in red) the coordinates of the mortality sites in the xysp.RData file have been generalized and are provided with a precision of 0.1 decimal degrees for Near Threatened and Vulnerable species, and rounded to 1 degree for Conservation concern and Endangered species.

File: xysp.RData

Description: Coordinates (longitude and latitude), Species, and Mortality year of the tree mortality dataset used in the analyses

File: Niche_DroughtMortality_Code_GEB.R

Description: Basic code (simplified) used to perform climatic niche characterization and computation of niche metrics for the species in the 'xysp' file

Code/software

R Core Team

Access information

Data was derived from the following sources:

• https://doi.org/10.1038/s41467-022-29289-2
• https://doi.org/10.1038/s41559-023-02180-z
• https://xylemfunctionaltraits.org/
• https://chelsa-climate.org/
• https://www.gbif.org/; see https://doi.org/10.15468/dd.ymx22h for the GBIF derived dataset