| Model effects | Estimates | Standard errors | Z-values |
| Intercept | 2.943 | 0.113 | 26.491*** |
| Natural wetland | −0.669 | 0.120 | −5.575*** |
| Constructed wetland | −0.000 | 0.988 | 0.000 |
| Time | −0.005 | 0.006 | −0.705 |
| B. bauchiensis vs Treatment site | −0.112 | 0.173 | −0.640 |