| Season | Sampling Location | Mean | SD | N |
| Winter | ST2 | 611 | 623 | 15 |
| ST3 | 213 | 146 | 15 | |
| ST4 | 163 | 110 | 15 | |
| ST5 | 132 | 61 | 15 | |
| Spring | ST2 | 1205 | 708 | 11 |
| ST3 | 1550 | 2305 | 15 | |
| ST4 | 1617 | 1068 | 9 | |
| ST5 | 1241 | 864 | 12 | |
| Summer | ST2 | 2510 | 1558 | 15 |
| ST3 | 2889 | 1368 | 15 | |
| ST4 | 1515 | 842 | 15 | |
| ST5 | 3317 | 3862 | 15 |