Table 3.
Coefficients for the best-fit Bayesian network model for tick abundance in Illinois by region, species, and lifestage using generalized linear models
| Observed variable | Region | Intercept | Precipitation | Tmax | DP | VPmax | VPmin | ||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Fall | Summer | Fall | Summer | Fall | Summer | Fall | Summer | Fall | Summer | Fall | Summer | ||
| Precip | All | 92.5 | 152 | ||||||||||
| Tmax | All | 8.57 | 6.02 | 0.0084 | 0.0056 | 1.33 | 1.16 | −1.4 | 1.49 | ||||
| DP | Central | −5.01 | 19.4 | 0.028 | −7.83E-05 | 16.8 | −0.93 | ||||||
| South | 16.4 | 19.9 | −0.051 | −0.0051 | 2.24 | 0.40 | |||||||
| VPmax | Central | 0.053 | −25.5 | 0.017 | 0.00078 | 0.415 | 2.28 | 0.419 | −1.32 | −0.55 | 0.81 | ||
| South | −15.9 | −19.7 | −0.0044 | −0.00031 | 2.03 | 1.68 | −1.29 | −0.653 | −1.02 | 1.06 | |||
| VPmin | Central | 0.80 | 0.00084 | ||||||||||
| South | 0.77 | −0.00050 | |||||||||||
|
Ixodes scapularis
Nymphs |
All | 0.22 | |||||||||||
|
Dermacentor Variabilis
Nymphs |
All | 0.050 | |||||||||||
|
Amblyomma Americanum
Nymphs |
All | 0.48 | 11.4 | ||||||||||
|
Ixodes scapularis
Adults |
All | 1.84 | 0.27 | −0.077 | −0.013 | ||||||||
|
Dermacentor Variabilis
Adults |
Central | −3.4 | 0.041 | 1.48 | |||||||||
| South | 15.1 | 0.028 | −19.44 | ||||||||||
|
Ixodes scapularis
Adults |
Central | −0.28 | 0.0065 | ||||||||||
| South | −0.41 | 0.031 | |||||||||||
Monthly climate variables were Tmax (average daily maximum temperature), DP (average daily dew point), VPmax (average daily maximum vapor pressure deficit), VPmin (average daily minimum vapor pressure deficit), and Precip (total precipitation).