Table 2 GAM results for the test of Hypothesis B

Longitude

0.00002

2.94%

Latitude

<0.00001

11.3%

Elevation

<0.00001

5.54%

Heat index

0.91

0.002%

Mean annual precipitation

<0.00001

3.95%

Mean maximum temperature in July

<0.00001

3.26%

Mean minimum temperature in January

0.00004

2.18%

Mean temperature of dew point in 2010

0.0003

2.63%

Cattle disturbance ranks

<0.00001

4.72%

Salt cover

0.06

0.39%

Rock cover

<0.00001

3.36%

Bare soil

<0.00001

2.86%

Longitude

<0.00001

27.8%

Latitude

<0.00001

Elevation

<0.00001

Mean maximum temperature in July

0.00002

Cattle disturbance ranks

<0.00001

Rock cover

0.00001

Bare soil

<0.00001