Table A2.

Model selection of fixed effects and interactions explaining the variation in bacterial and fungal In-Out beta-diversity.

In-Out beta-diversity	Model	p	AIC	deltaAIC
Bacteria	Dist.pH	2	−488.7	0
	Dist.env	2	−486.9	1.8
	Bedrock + alt	3	−483.9	4.8
	Bedrock	2	−482.9	5.8
	Alt + bedrock + alt: bedrock	4	−482.3	6.3
	Alt × bedrock	4	−482.3	6.3
	Dist.NO3	2	−480.9	7.8
	Dist.C	2	−475.5	13.2
	Alt	2	−475.2	13.5
	Dist.N	2	−474.7	14
	1	1	−471.8	16.9
	Dist.NH4	2	−470.3	18.4
	Dist.SWC	2	−469.9	18.8
Fungi	Bedrock + alt	3	−267.1	0
	Bedrock	2	−265.8	1.3
	Alt + bedrock + alt: bedrock	4	−265.1	2
	Alt × bedrock	4	−265.1	2
	Dist.NO3	2	−258.4	8.7
	1	1	−258.4	8.7
	Dist.pH	2	−258.1	9
	Alt	2	−258	9.1
	Dist.C	2	−257.7	9.4
	Dist.env	2	−257.3	9.8
	Dist.N	2	−256.9	10.2
	Dist.SWC	2	−256.7	10.4
	Dist.NH4	2	−256.4	10.7

Fixed effects are the bedrock, elevation, and the dissimilarities of total carbon content, total nitrogen content, soil water content, ammonium content, nitrate content, and soil pH. Models are ordered according to the AIC statistic. p is the number of parameters in the model.