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ATLAS REPORT

Mangrove ecosystem report: Guinea

Generated 15 October 2026, 05:15 from live Atlas data

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Executive summary

Atlas holds 219,456 mapped features and 37,971 observations in 25 datasets. The mapped mangrove canopy covers 226,706 ha in 11,330 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.176 ha, while patches of 10 ha or more hold 97.4% 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)
Mangrove11,330226,706.3100.0%20.01
Shannon evenness by area: 0.00

Fragmentation & landscape metrics

Patches
11,330
Mean / median / largest
20.01 / 0.176 / 8,278.5 ha
Effective mesh size
2,354.7 ha
Largest patch index
3.7%
Power-law exponent α
1.48

Spatial clustering

Global Moran’s I = 0.123 (z = 4.1, p < 0.001). Hot-spot cells (Gi*, ≥95%): 24; cold-spot cells: 15.

Top hot-spot cellPolygonsArea (ha)Gi* z
9.55, -13.55353362.92
9.35, -13.3261,4742.83
9.35, -13.35371,5672.73
9.6, -13.51015662.50
9.55, -13.45681,2922.39
9.5, -13.55175802.38

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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