| Season | Sampling Location | Mean | SD | N |
| Winter | ST2 | 377 | 533 | 15 |
| ST3 | 1525 | 1039 | 15 | |
| ST4 | 1484 | 1044 | 15 | |
| ST5 | 91 | 77 | 15 | |
| Spring | ST2 | 2827 | 2257 | 12 |
| ST3 | 555 | 1013 | 15 | |
| ST4 | 100 | 75 | 9 | |
| ST5 | 1456 | 2329 | 12 | |
| Summer | ST2 | 761 | 1034 | 15 |
| ST3 | 1258 | 1995 | 14 | |
| ST4 | 1671 | 1396 | 15 | |
| ST5 | 1087 | 1452 | 15 |