Variable 1
Soil characteristics
Model 1
SOC
P (Variable)
***
Model 2
SOC
P (Variable)
***
Model 3
SOC
P (Variable)
***
Model 4
SOC
P (Variable)
***
Model 5
SOC
P (Variable)
***
Plant community characteristics
Model 6
SOC
P (Variable)
***
Model 7
SOC
P (Variable)
***
Root characteristics
Model 8
SOC
P (Variable)
***
Model 9
SOC
P (Variable)
***
Model 10
SOC
P (Variable)
***
Model 11
SOC
P (Variable)
Model 12
***
SOC
P (Variable)
Model 13
P (Variable)
Model 14
P (Variable)
***
SOC
***
SOC
***
Variable 2
Interaction between
Variable 1 and Variable 2
R2
CaCO3
*
Sodium
n.s
Sand
***
Silt
**
Clay
n.s
SOC x CaCO3
n.s
SOC x Sodium
n.s
SOC x Sand
**
SOC x Silt
**
SOC x Clay
n.s
0.48
***
0.46
***
0.57
***
0.55
***
0.45
***
Richness
*
Simpson
n.s
SOC x Simpson
n.s
SOC x Simpson
0.48
***
0.46
***
RMD
*
RLD
n.s
SRL
**
Mean root
diameter
**
Root diameter
diversity
*
Fine roots
*
Very fine roots
***
SOC x RMD
n.s
SOC x RLD
n.s
SOC x SRL
n.s
SOC x Mean root diameter
0.49
***
0.47
***
0.51
***
0.51
***
0.48
***
0.51
***
0.54
***
n.s
SOC x Root diameter
diversity
n.s
SOC x Fine roots
*
SOC x Very fine roots
n.s
P
Model