TABLE 5.
BLR results for 16S rRNA gene and non-16S rRNA gene markers in WS1 and WS2
| Response variable | Explanatory variablea | P | Odds ratio 95% confidence interval
|
Test of global null hypothesis
|
Model fit
|
||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Lower boundary | Upper boundary | Chi square | df | P | Deviance | df | Pb | Rescaled R2 | |||
| Bac32F | pH (−)c | <0.001 | 0.24 | 0.64 | 110.8 | 6 | <0.001 | 194.2 | 224 | 0.925 | 0.52 |
| Log (enterococcal density) | <0.001 | 1.44 | 2.02 | ||||||||
| Seasond | |||||||||||
| Spring | <0.001 | 2.55 | 17.11 | ||||||||
| Summer | 0.003 | 1.81 | 17.97 | ||||||||
| Fall | 0.439 | 0.57 | 3.67 | ||||||||
| Watershed (WS1)e | 0.002 | 1.91 | 15.86 | ||||||||
| CF128F | Log (enterococcal density) | <0.001 | 1.35 | 2.08 | 114.8 | 5 | <0.001 | 107.9 | 177 | 1.000 | |
| Season | |||||||||||
| Spring (−) | 0.339 | 0.18 | 1.79 | ||||||||
| Summer (−) | 0.080 | 0.08 | 1.16 | ||||||||
| Fall (−) | 0.017 | 0.05 | 0.74 | ||||||||
| Watershed (WS1) | <0.001 | 8.41 | 55.35 | ||||||||
a
A minus sign in parentheses indicates a negative correlation.
b
A deviance P value of >0.05 indicates no significant lack of fit.
c
pH values were transformed by dividing the values by 10.
d
The season factor can be interpreted as the difference between marker occurrence in a season and marker occurrence in winter; e.g., “spring” being significant (P < 0.001) means that the marker occurrence in the spring was found to be higher than the marker occurrence in the winter.
e
The watershed factor can be interpreted as the difference between marker occurrence in WS1 and marker occurrence in WS2 (i.e., WS1 marker occurrence − WS2 marker occurrence).