Atlas · Mauritania
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ATLAS REPORT
Mangrove ecosystem report: Mauritania
Generated 15 October 2026, 09:19 from live Atlas data
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Executive summary
Atlas holds 78,752 mapped features and 37,972 observations in 25 datasets. The mapped mangrove canopy covers 219 ha in 67 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.430 ha, while patches of 10 ha or more hold 72.9% 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 | 67 | 218.7 | 100.0% | 3.26 |
Shannon evenness by area: 0.00
Fragmentation & landscape metrics
- Patches
- 67
- Mean / median / largest
- 3.26 / 0.430 / 63.5 ha
- Effective mesh size
- 34.9 ha
- Largest patch index
- 29.0%
- Power-law exponent α
- 1.67
Spatial clustering
Global Moran’s I = 0.106 (z = 0.9, p = 0.373). Hot-spot cells (Gi*, ≥95%): 0; cold-spot cells: 0.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| 16.1, -16.45 | 1 | 64 | 1.94 |
| 16.05, -16.5 | 22 | 53 | 1.76 |
| 16.1, -16.5 | 12 | 49 | 1.16 |
| 16.05, -16.55 | 1 | 0 | 0.95 |
| 16.3, -16.45 | 13 | 35 | 0.53 |
| 16.3, -16.5 | 5 | 3 | 0.53 |
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.