Table 5. Outlier SNP summaries. Number of outlier SNPs identified using PCAdapt and the number located within genomic islands and genomic valleys per population comparison.

Divergence timeframe	Mode of divergence	Comparison	No. outliers identified	No. outliers in genomic islands	No. outliers in genomic valleys
Early stage	Gene flow	SI vs. CI	14	0	0
Early stage	No-gene flow	SI vs. FP	28	4	0
Mid stage	Gene flow	ML vs. HI	235	4	0
Late stage	Gene flow	GT vs. LF	89	4	0
Late stage	No-gene flow	ML vs. LH	76	0	1