Full scientific report: Guinea-Bissau
Generated 13 November 2026, 03:20 from live Atlas data
Executive summary
Atlas holds 231,506 mapped features and 37,971 observations in 23 datasets. The mapped mangrove canopy covers 297,120 ha in 12,944 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.175 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
| Formation | Polygons | Area (ha) | Share | Mean patch (ha) |
|---|---|---|---|---|
| Mangrove | 12,944 | 297,120.3 | 100.0% | 22.95 |
Fragmentation & landscape metrics
- Patches
- 12,944
- Mean / median / largest
- 22.95 / 0.175 / 7,079.5 ha
- Effective mesh size
- 2,179.4 ha
- Largest patch index
- 2.4%
- Power-law exponent α
- 1.46
Spatial clustering
Global Moran’s I = 0.152 (z = 6.7, p < 0.001). Hot-spot cells (Gi*, ≥95%): 67; cold-spot cells: 36.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| 11.95, -15.95 | 5 | 1,724 | 3.47 |
| 12, -15.95 | 15 | 698 | 3.42 |
| 11.2, -15.25 | 62 | 863 | 3.29 |
| 11.85, -16.05 | 3 | 757 | 3.27 |
| 11.95, -15.75 | 13 | 1,223 | 3.16 |
| 11.1, -16.05 | 12 | 765 | 3.13 |
Pressure: LAPSSET and villages
Mangrove ha by distance from LAPSSET
Mangrove ha by distance from villages
Data quality
| Dataset | Features | Repaired | Score |
|---|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Guinea-Bissau | 11,763 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 1996, Guinea-Bissau | 13,923 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2007, Guinea-Bissau | 13,710 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2010, Guinea-Bissau | 11,525 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2015, Guinea-Bissau | 11,752 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Guinea-Bissau | 15,271 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Guinea-Bissau | 12,944 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Guinea-Bissau | 12,262 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Guinea-Bissau | 11,949 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Guinea-Bissau | 13,375 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Guinea-Bissau | 13,503 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Guinea-Bissau | 14,364 | 0 | 100 |
| Fibre Cable Landing Stations | 126 | 0 | 95 |
| Rivers | 228 | 0 | 95 |
| Power Plants (Power output MW) | 642 | 0 | 95 |
| Small airport | 1,979 | 0 | 95 |
| Districts | 6,099 | 13 | 95 |
| World Database on Protected Areas | 7,438 | 1 | 95 |
| Electricity Transmission Network | 9,759 | 0 | 95 |
| Irrigated Areas | 23,095 | 1 | 95 |
| Agro-Ecological Zones | 25,791 | 17 | 95 |
| Seagrass (UNEP-WCMC): Guinea-Bissau | 1 | 0 | 90 |
| Community and nature projects (UNDP): Guinea-Bissau | 7 | 0 | 90 |
Recommendations
Datasets & sources
| Dataset | Publisher | Features |
|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 11,763 |
| Global Mangrove Watch: mangrove extent 1996, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,923 |
| Global Mangrove Watch: mangrove extent 2007, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,710 |
| Global Mangrove Watch: mangrove extent 2010, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 11,525 |
| Global Mangrove Watch: mangrove extent 2015, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 11,752 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 15,271 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 12,944 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 12,262 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 11,949 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,375 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 13,503 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Guinea-Bissau | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 14,364 |
| Fibre Cable Landing Stations | WWF Kenya | 126 |
| Rivers | WWF Kenya | 228 |
| Power Plants (Power output MW) | WWF Kenya | 642 |
| Small airport | WWF Kenya | 1,979 |
| Districts | WWF Kenya | 6,099 |
| World Database on Protected Areas | WWF Kenya | 7,438 |
| Electricity Transmission Network | WWF Kenya | 9,759 |
| Irrigated Areas | WWF Kenya | 23,095 |
| Agro-Ecological Zones | WWF Kenya | 25,791 |
| Seagrass (UNEP-WCMC): Guinea-Bissau | UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT | 1 |
| Community and nature projects (UNDP): Guinea-Bissau | United Nations Development Programme (UNDP) | 7 |