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ATLAS REPORT
Mangrove ecosystem report: Gabon
Generated 15 October 2026, 02:45 from live Atlas data
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Executive summary
Atlas holds 490,401 mapped features and 294,972 observations in 83 datasets. The mapped mangrove canopy covers 194,465 ha in 7,554 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.179 ha, while patches of 10 ha or more hold 98.1% of the area. 0 ha (0.0%) lies within 10 km of the LAPSSET development footprint.
Single mapping epoch (2019). Areas are geodesic hectares recalculated from geometry.
Species & formations
| Formation | Polygons | Area (ha) | Share | Mean patch (ha) |
|---|---|---|---|---|
| Mangrove | 7,554 | 194,464.5 | 100.0% | 25.74 |
Shannon evenness by area: 0.00
Fragmentation & landscape metrics
- Patches
- 7,554
- Mean / median / largest
- 25.74 / 0.179 / 12,187.3 ha
- Effective mesh size
- 4,864.7 ha
- Largest patch index
- 6.3%
- Power-law exponent α
- 1.52
Spatial clustering
Global Moran’s I = 0.119 (z = 3.5, p < 0.001). Hot-spot cells (Gi*, ≥95%): 38; cold-spot cells: 2.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| -0.8, 8.95 | 38 | 1,557 | 3.52 |
| -0.75, 8.95 | 48 | 159 | 3.30 |
| -1.3, 9.05 | 78 | 123 | 3.10 |
| -0.85, 8.95 | 23 | 8,170 | 3.02 |
| -1.05, 8.95 | 189 | 1,971 | 2.89 |
| -1.35, 9.05 | 190 | 3,139 | 2.88 |
Methods & limits
Areas and lengths are recomputed on the WGS 84 ellipsoid; units are harmonised (ha, m, %, UTC). The mapping is a single 2019 epoch; the source publishes no licence; field plots are a sample; scenario figures are illustrative assumptions. Cite the original publishers listed above. Full methods: Methodologies page.