TABLE 4.

Results of the Mantel test correlating fungal taxonomic (Jaccard) and phylogenetic (MPD) beta diversity and various predictor variables

Diversity measure and factor (unit)	Mantel r	P valuea
Taxonomic diversity
No. of freezing days/yr	0.23	***
Wheat cultivar	0.23	***
Cropping history	0.21	***
Summer rainfall (mm)	0.11	*
Elevation (m)	0.07	*
pH	0.07	0.07
Geographic distance	0.06	0.1
CaCO3 (mg kg−1)	0.05	0.19
Mg (mg kg−1)	0.04	0.19
Pa (mg kg−1)	0.03	0.3
Ctot/Ptot ratio	0.03	0.3
Ctot/Ntot ratio	0.03	0.31
Ntot/Ptot ratio	0.03	0.34
Ntot (mg kg−1)	0.02	0.4
Corg (%)	0.02	0.38
K (mg kg−1)	0.02	0.41
Temp (°C)	0.02	0.31
Annual rainfall (mm)	0.02	0.31
Farming system	0.02	0.44
Ptot (mg kg−1)	0.001	0.51
Phylogenetic diversity
Farming system	0.17	**
No. of freezing days/yr	0.16	*
Ntot	0.12	0.05
CaCO3 (mg kg−1)	0.11	0.06
Ctot/Ptot ratio	0.11	0.07
Corg (%)	0.11	0.06
Ntot/Ptot ratio	0.08	0.1
Annual rainfall (mm)	0.08	0.09
K (mg kg−1)	0.06	0.19
Summer rainfall (mm)	0.05	0.15
Elevation (m)	0.04	0.21
Geographic distance	0.04	0.22
Ptot	0.04	0.2
Cropping history	0.04	0.26
Ctot/Ntot ratio	0.03	0.24
pH	0.02	0.39
Wheat cultivar	0.01	0.29
Mg (mg kg−1)	0.008	0.52
Temp (°C)	0.006	0.49
Pa (mg kg−1)	0.001	0.5

^a*, P < 0.05; **, P < 0.01; ***, P < 0.001.