TABLE 4.
Mann-Whitney U test results and descriptive statistical summaries for specific Bacteroidales markers for the pre-CTD intervention period (2005 to 2006)a
| Site comparisonb | Bacteroidales microbial markerc | Total copies day−1 ha−1 |
Mean rank sum for: |
n for: |
Mann-Whitney U test P valued | |||||
|---|---|---|---|---|---|---|---|---|---|---|
| Mean |
Median |
CTD site | UCTD site | CTD site | UCTD site | |||||
| CTD site | UCTD site | CTD site | UCTD site | |||||||
| CTDD vs UCTDU | Total | 4.04 × 109 | 2.02 × 1010 | 5.17 × 108 | 6.65 × 109 | 16.3 | 25.3 | 23 | 16 | 0.017* |
| Human | 8.04 × 106 | 0 | 0 | 0 | 20.3 | 19.5 | 23 | 16 | 0.434 | |
| Pig | 0 | 0 | 0 | 0 | 20.0 | 20.0 | 23 | 16 | 0.989 | |
| Ruminant | 5.25 × 106 | 3.76 × 105 | 0 | 0 | 20.6 | 19.2 | 23 | 16 | 0.498 | |
| Muskrat | 1.36 × 104 | 4.42 × 107 | 0 | 0 | 18.8 | 21.8 | 23 | 16 | 0.136 | |
| Canada goose | 6.12 × 104 | 0 | 0 | 0 | 20.3 | 19.5 | 23 | 16 | 0.434 | |
| CTDU vs UCTDU | Total | 4.49 × 109 | 2.02 × 1010 | 1.47 × 109 | 6.65 × 109 | 14.0 | 17.9 | 15 | 16 | 0.244 |
| Human | 0 | 0 | 0 | 0 | 16.0 | 16.0 | 15 | 16 | 0.984 | |
| Pig | 0 | 0 | 0 | 0 | 16.0 | 16.0 | 15 | 16 | 0.984 | |
| Ruminant | 1.86 × 106 | 3.76 × 105 | 0 | 0 | 16.1 | 15.9 | 15 | 16 | 0.963 | |
| Muskrat | 2.43 × 106 | 4.42 × 107 | 0 | 0 | 15.4 | 16.6 | 15 | 16 | 0.579 | |
| Canada goose | 0 | 0 | 0 | 0 | 16.0 | 16.0 | 15 | 16 | 0.984 | |
a
Arithmetic means are used here for purely descriptive purposes.
b
UCTDD had limited data, and therefore data are not presented.
c
Densities of pathogens, viruses, and coliphages were not monitored in this period.
d
*, significant (P < 0.05).