🌿 Mangrove Tree Growth (Ecosystem: Mangrove)

Measure mangrove plots/transects over time using a consistent plan. This protocol uses plots (points/areas) or transect segments (lines) inside a site.

What you need first

• An Organisation and Project (Org, Project)
• A Site set to Mangrove with geometry (Site)
• A Survey Plan for Mangrove Tree Growth (uses points/lines/polygons) (Plan)
• Plots/transects defined in the plan (stable boundaries)

Screenshot: Selecting a Tree Growth plan when creating a survey

Field workflow

1. Navigate to each plot/transect from the plan.
2. For each tree (or representative sample):
   • Record Species (or note common name to resolve later).
   • Measure DBH (cm) and Height (m) using a consistent method (e.g., DBH at 1.3 m; adjust for buttresses and note it).
   • Add Count (individuals represented), Health (e.g., healthy/stressed/dead), and Notes.
3. Keep methods consistent across visits (same plot boundaries, same DBH height).

Data entry in MariMap

1. Create a survey from your Tree Growth plan (https://marimap.com/app/surveys/new (opens in a new tab)).
2. Confirm Site, Date, and auto-generated Survey ID.
3. The plan pulls in your plots/transects; add measurements per plot:
   • Species, DBH, height, count, health, notes.
4. Review and save.

Screenshot: Entering DBH/height/health for a plot

Tips for good data

• Use the same plots/transects every visit; avoid shifting boundaries.
• Note protocol nuances (buttress handling, leaners) in the survey description.
• Double-check extreme DBH/height values before saving.
• If your taxonomy is uncertain in the field, capture the best name and refine later.