| Strata | Number of clusters | Number of plots | ||
| 2016 | 2021 | 2016 | 2021 | |
| High mangrove | 9 | 7 | 36 | 28 |
| Low mangrove | 13 | 13 | 52 | 52 |
| Total | 22 | 20 | 88 | 80 |