TABLE 1.

Soil effects on OTU Shannon diversity by marker

Marker	Soil layer	Variable	Mean	SD	0.025	0.5	0.975
18S	Litter	Intercept	3.871	11.000	−19.413	4.034	25.957
		pH	0.067	0.061	−0.054	0.067	0.187
		Carbon	−0.057	0.077	−0.209	−0.056	0.089
		Chemical	0.109	0.090	−0.069	0.109	0.278
		Physical	0.017	0.043	−0.070	0.018	0.100
	Soil	Intercept	3.393	0.703	1.804	3.456	4.653
		pH	−0.019	0.045	−0.108	−0.019	0.070
		Carbon	−0.287	0.048	−0.384	−0.287	−0.194
		Chemical	0.049	0.034	−0.011	0.048	0.122
		Physical	0.029	0.031	−0.033	0.030	0.089
COI	Litter	Intercept	3.871	11.000	−19.413	4.034	25.957
		pH	0.067	0.061	−0.054	0.067	0.187
		Carbon	−0.057	0.077	−0.209	−0.056	0.089
		Chemical	0.109	0.090	−0.069	0.109	0.278
		Physical	0.017	0.043	−0.070	0.018	0.100
	Soil	Intercept	−1.670	12.588	−26.767	−1.834	24.665
		pH	0.085	0.055	−0.022	0.085	0.192
		Carbon	0.109	0.074	−0.037	0.109	0.253
		Chemical	0.620	0.082	0.460	0.619	0.782
		Physical	−0.019	0.035	−0.087	−0.019	0.050
ITS	Litter	Intercept	3.871	11.000	−19.413	4.034	25.957
		pH	0.067	0.061	−0.054	0.067	0.187
		Carbon	−0.057	0.077	−0.209	−0.056	0.089
		Chemical	0.109	0.090	−0.069	0.109	0.278
		Physical	0.017	0.043	−0.070	0.018	0.100
	Soil	Intercept	−1.400	10.548	−22.631	−1.470	20.545
		pH	−0.114	0.058	−0.229	−0.114	0.000
		Carbon	−0.389	0.085	−0.557	−0.388	−0.224
		Chemical	0.319	0.081	0.161	0.319	0.480
		Physical	−0.046	0.037	−0.119	−0.046	0.027

The table shows the coefficients of each predictor in four Bayesian general multivariate regression models using stochastic partial differential equations (SPDE) that explicitly consider spatial correlation, modeling OTU diversity dependent on soil properties for Amazonian fungi in litter and soil. Since the organic carbon content and pH are considered important variables for soil biota, we use them as independent variables. Bold indicates important predictor variables (credible intervals not crossing zero). The importance of soil properties differed between markers and were significant only for the soil diversity. Carbon content was important for 18S and ITS soil, and chemical PC1 was important for COI and ITS.