Atlas · South Africa
/
Reports
ATLAS REPORT
Mangrove ecosystem report: South Africa
Generated 15 October 2026, 06:24 from live Atlas data
EditPrint / PDF
Executive summary
Atlas holds 114,918 mapped features and 38,220 observations in 47 datasets. The mapped mangrove canopy covers 2,001 ha in 458 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.157 ha, while patches of 10 ha or more hold 85.0% 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 | 458 | 2,001.5 | 100.0% | 4.37 |
Shannon evenness by area: 0.00
Fragmentation & landscape metrics
- Patches
- 458
- Mean / median / largest
- 4.37 / 0.157 / 659.2 ha
- Effective mesh size
- 280.6 ha
- Largest patch index
- 32.9%
- Power-law exponent α
- 1.60
Spatial clustering
Global Moran’s I = 0.265 (z = 1.6, p = 0.110). Hot-spot cells (Gi*, ≥95%): 6; cold-spot cells: 0.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| -28.8, 32 | 36 | 95 | 2.53 |
| -28.85, 32 | 70 | 877 | 2.53 |
| -28.85, 31.95 | 12 | 288 | 2.50 |
| -28.8, 31.95 | 4 | 3 | 2.50 |
| -28.8, 32.05 | 18 | 54 | 2.47 |
| -28.85, 32.05 | 1 | 16 | 2.47 |
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.