Summer maximum value of daily

 

Minimum temperature

 

Mean temperature

 

Maximum temperature

 

AIC of each model

 

 

 

 

 

 

Null model

135.7

 

138.5

 

145.8

 

Linear regression as a function of altitude

76.3

 

110.2

 

142.6

 

Quadratic regression as a function of altitude

74.9

 

108.4

 

140.9

 

Estimates in the best-fit model

 

 

 

 

 

 

Intercept

2.78E+01

***

3.20E+01

***

3.96E+01

***

Altitude

-6.92E-03

***

-9.17E-03

**

-1.23E-02

*

Altitude2

6.02E-07

+

1.36E-06

+

2.83E-06

+


***, P < 0.001; **, P < 0.01; *, P < 0.05; +, P < 0.10.
Table 3: AIC values and estimates of parameters for the models used to fit soil (5-cm depth) temperature to altitude.