Genetic summary statistics
Genetic summary statistics were calculated for each of the twelve local
populations. Variant sites, polymorphic sites, private alleles, and
nucleotide diversity (πT) were calculated using thepopulation program (Catchen et al., 2013). Overall summary
statistics per loci and gene diversity (h ) by population were
calculated using the function basic.stats, as well as allelic richness
estimates (Ar) by rarefying allelic counts per
population with the allelic.richness with the hierfst version
0.5-11 R package (Goudet & Jombart, 2022). Genotype diversity (MLG) and
the richness indexes: Shannon-Weiner Diversity index (H), Stoddard and
Taylor’s Index (G), and Simpson’s index (lambda) were calculated using
the function poppr with the poppr 2.9.3 R package (Kamvar
et al., 2014, 2015). Linear regressions were fitted with the functionlm in the stats package (R Core Team, 2022) to explore
differences between the genetic diversity metrics calculated above and
with forest fragment sizes (1-, 10-, 100-ha and continuous forests) and
size class (small and large patches).