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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

FormationPolygonsArea (ha)ShareMean patch (ha)
Mangrove7,554194,464.5100.0%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 cellPolygonsArea (ha)Gi* z
-0.8, 8.95381,5573.52
-0.75, 8.95481593.30
-1.3, 9.05781233.10
-0.85, 8.95238,1703.02
-1.05, 8.951891,9712.89
-1.35, 9.051903,1392.88

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.
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