| Sampling unit | Sampling technique | Element assessed |
| Location of sampling points within stations | Targeted | Vegetation layer; |
| Transect location | Point center method (PCQM) | Trees; Shrubs; Palms. |
| Quadrat locations | Point center method (PCQM) systematically placed at 0 m, 25 m et 50 m from the transect | Macrophytes |