Table 5. Summary of model selection on constrained ordination models (RDA and dbRDA) that describe the influence of spatial heterogeneity on beetle and fungal genetic variation.

RDA	Region	Species	Model	F	p-value	R2	R2adj
	ALL	Beetle	∼Euclidean Distance	2.804	0.034	0.177	0.114
	n = 15	Fungus	∼Euclidean Distance	2.680	0.007	0.171	0.107
	NORTH	Beetle	∼CSI+Pine Volume	2.614	0.005	0.511	0.316
	n = 8	Fungus	-	-	-	-	-
	SOUTH	Beetle	∼Fungi PC2	1.743	0.025	0.258	0.110
	n = 7	Fungus	-	-	-	-	-

For each species, forward selection was applied to identify which variables best described variation in allele frequencies using an inclusion threshold of α = 0.05. Significant correlations are in bold. Dashes indicate that no variables were selected.