| Actively Managed | Naturally Recovering | ||||
| Mean | S.E. | Mean | S.E. | p-value | |
| A. caudatum | 0.00 | 0.00 | 0.41 | 0.27 | N/A |
| O. oregana | 2.83 | 1.08 | 11.88 | 3.73 | 0.174 |
| P. munitum | 1.28 | 0.56 | 2.18 | 0.70 | 0.414 |
| T. ovatum | 0.02 | 0.02 | 0.46 | 0.21 | 0.028* |