Figure 1. Comparison of mean annual temperature (MAT) of origin for seed
source and planting locations within observed thermal niche of each
species (GBIF 2024). Boxplots show the MAT (1981-2010 CHELSA database
V.2.1) distribution throughout each species global native range
(occurrences obtained from GBIF, cleaned for errors, and spatially
thinned to 1km resolution). The black line is the median, with the grey
filled region equal to 1.5 × the interquartile range. Whiskers represent
the 25th and 75th percentile, and
outliers are not shown for clarity. The red and blue points represent
the MAT of origin for the seed source locations of the lowland and
upland provenances respectively. The three coloured vertical lines
represent the MAT at the common garden sites. Species are arranged in
order of their mean thermal niche.