Figure 8

Principal component analysis (PCA) showing the climatic profiles of 28 studied populations of Scots pine based on the five bioclimatic variables that had the greatest impact on the distribution of the species in the Caucasus ecoregion (bio5—Max Temperature of Warmest Month, bio6—Min Temperature of Coldest Month, bio8—Mean Temperature of Wettest Quarter, bio16—Precipitation of Wettest Quarter and bio18—Precipitation of Warmest Quarter). The population acronyms are given in Table 1.