Time
|
Elevation
|
Elevation*Time
|
AIC 2011
|
AIC 2012
|
---|
df = 1
| | |
3728
|
2834
|
df = 2
| | |
3723
|
2813
|
df = 3
| | |
3715
|
2814
|
df = 4
| | |
3718
|
2816
|
df = 5
| | |
3715
|
2817
|
df = 5
|
X
| |
3687
|
2809
|
df = 4
|
X
| |
3693
|
2808
|
df = 3
|
X
| |
3690
|
2806
|
df = 5
|
X
|
X
|
3614
|
2799
|
df = 4
|
X
|
X
|
3640
|
2798
|
df = 3
|
X
|
X
|
NC
|
2796
|
- All the models use the total tick abundance from each 20-m2 flagging as the response. Time as a natural cubic spline term, and elevation as a two level factor variable where high or low are predictors. df = degrees of freedom in the spline function; * = interaction term; NC = model did not converge. The chosen descriptive model is in bold, for 2012 it was chosen over the best model as visual inspection indicated a better fit.