Table 3.

Site variables reported with coordinates (NMDS1 and NMDS2 axes) and with both the r² and p-values that explain the strength of the relationship between ECM fungal species sampled from the roots of eight-year-old chestnuts and the associated environmental variables across the sites. Significant (p ≤ 0.05) are designated by single asterisks.

Variables	NMDS1	NMDS2	_r2	p-value
Chestnut height (cm)	0.07244	−0.07338	0.65	0.006	_*
Chestnut basal diameter (mm)	0.26412	−0.96449	0.64	0.005	_*
Percent vegetation cover	0.88985	−0.45625	0.34	0.16
Percent bare ground	−0.88985	0.45625	0.34	0.16
Soil organic matter (%)	0.66208	0.74944	0.60	0.01	_*
Number of plant species	−0.18420	0.98289	0.62	0.02	_*
Lespedeza cover	0.22409	−0.97457	0.51	0.04	_*
Sweet clover	−0.01451	0.99989	0.62	0.01	_*
Soil pH	−0.97618	0.21696	0.28	0.24
Soil moisture	−0.18892	0.98199	0.12	0.56
NO3-ppm	0.68609	0.72752	0.22	0.32
P ppm	−0.71566	−0.69845	0.80	0.002	_*
K ppm	−0.66499	0.74685	0.57	0.02	_*
Ca ppm	0.54864	−0.83606	0.05	0.79
Mg ppm	−0.78874	−0.61472	0.81	0.001	_*
Zn ppm	−0.32689	−0.94506	0.64	0.006	_*
Mn ppm	−0.57164	−0.82051	0.72	0.004	_*
Cu ppm	−0.83760	−0.54629	0.78	0.001	_*
B ppm	0.16723	−0.98592	0.32	0.17
Na ppm	−0.75856	−0.65160	0.27	0.24
Cation exchange capacity	0.45062	−0.89271	0.05	0.81