Summary of plot locations in the ESSF zone, number of observations used in the analysis, and the age and height ranges of the sample trees.

a Subzones are designated by a two-character code. The first character denotes the precipitation regime (d = dry, m = moist, w = wet, x = xeric), the second character denotes the temperature regime (v = very cold, c = cold, k = cool, m = mild, w = warm) [2].b—indicates that no allocation was planned; subzone was sampled in the pilot phase.Summary of plot locations in the ESSF zone, number of observations used in the analysis, and the age and height ranges of the sample trees.