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ATLAS REPORT
Mangrove ecosystem report: Eritrea
Generated 15 October 2026, 06:24 from live Atlas data
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Executive summary
Atlas holds 100,798 mapped features and 37,971 observations in 26 datasets. The mapped mangrove canopy covers 7,208 ha in 1,166 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.259 ha, while patches of 10 ha or more hold 86.6% 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 | 1,166 | 7,207.8 | 100.0% | 6.18 |
Shannon evenness by area: 0.00
Fragmentation & landscape metrics
- Patches
- 1,166
- Mean / median / largest
- 6.18 / 0.259 / 305.9 ha
- Effective mesh size
- 106.6 ha
- Largest patch index
- 4.2%
- Power-law exponent α
- 1.53
Spatial clustering
Global Moran’s I = 0.140 (z = 2.1, p = 0.036). Hot-spot cells (Gi*, ≥95%): 12; cold-spot cells: 0.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| 12.95, 42.9 | 30 | 200 | 3.37 |
| 12.9, 42.9 | 17 | 266 | 2.99 |
| 14.85, 40.65 | 12 | 180 | 2.68 |
| 12.9, 42.85 | 16 | 65 | 2.66 |
| 12.95, 42.95 | 1 | 30 | 2.53 |
| 12.9, 42.95 | 42 | 249 | 2.40 |
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.