Mangrove ecosystem report: Tanzania
Generated 13 November 2026, 02:34 from live Atlas data
Executive summary
Atlas holds 4,378,279 mapped features and 77,355 observations in 225 datasets. The mapped mangrove canopy covers 111,509 ha in 7,458 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.178 ha, while patches of 10 ha or more hold 95.8% 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 | 7,458 | 111,509.4 | 100.0% | 14.95 |
Fragmentation & landscape metrics
- Patches
- 7,458
- Mean / median / largest
- 14.95 / 0.178 / 4,464.6 ha
- Effective mesh size
- 941.2 ha
- Largest patch index
- 4.0%
- Power-law exponent α
- 1.46
Spatial clustering
Global Moran’s I = 0.079 (z = 2.5, p = 0.013). Hot-spot cells (Gi*, ≥95%): 30; cold-spot cells: 8.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| -7.85, 39.3 | 8 | 4,291 | 3.48 |
| -7.8, 39.3 | 7 | 1,858 | 3.44 |
| -7.85, 39.35 | 53 | 931 | 3.04 |
| -8.15, 39.35 | 46 | 1,522 | 2.99 |
| -8.95, 39.4 | 21 | 435 | 2.97 |
| -9, 39.4 | 21 | 860 | 2.85 |