Full scientific report: Guinea
Generated 13 November 2026, 03:07 from live Atlas data
Executive summary
Atlas holds 219,456 mapped features and 37,971 observations in 25 datasets. The mapped mangrove canopy covers 226,706 ha in 11,330 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.176 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 | 11,330 | 226,706.3 | 100.0% | 20.01 |
Fragmentation & landscape metrics
- Patches
- 11,330
- Mean / median / largest
- 20.01 / 0.176 / 8,278.5 ha
- Effective mesh size
- 2,354.7 ha
- Largest patch index
- 3.7%
- Power-law exponent α
- 1.48
Spatial clustering
Global Moran’s I = 0.123 (z = 4.1, p < 0.001). Hot-spot cells (Gi*, ≥95%): 24; cold-spot cells: 15.
| Top hot-spot cell | Polygons | Area (ha) | Gi* z |
|---|---|---|---|
| 9.55, -13.55 | 35 | 336 | 2.92 |
| 9.35, -13.3 | 26 | 1,474 | 2.83 |
| 9.35, -13.35 | 37 | 1,567 | 2.73 |
| 9.6, -13.5 | 101 | 566 | 2.50 |
| 9.55, -13.45 | 68 | 1,292 | 2.39 |
| 9.5, -13.55 | 17 | 580 | 2.38 |
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 | 12,782 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 1996, Guinea | 10,056 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2007, Guinea | 10,621 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2010, Guinea | 9,643 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2015, Guinea | 9,715 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Guinea | 14,142 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Guinea | 11,330 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Guinea | 10,949 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Guinea | 8,659 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Guinea | 8,465 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Guinea | 8,516 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Guinea | 9,393 | 0 | 100 |
| Fibre Cable Landing Stations | 126 | 0 | 95 |
| Power Plants (Power output MW) | 642 | 0 | 95 |
| Small airport | 1,979 | 0 | 95 |
| Dams | 2,586 | 0 | 95 |
| Districts | 6,099 | 13 | 95 |
| World Database on Protected Areas | 7,438 | 1 | 95 |
| Electricity Transmission Network | 9,759 | 0 | 95 |
| Divisions | 17,649 | 9 | 95 |
| Irrigated Areas | 23,095 | 1 | 95 |
| Agro-Ecological Zones | 25,791 | 17 | 95 |
| Carbon projects: Guinea | 2 | 0 | 90 |
| Seagrass (UNEP-WCMC): Guinea | 2 | 0 | 90 |
| Community and nature projects (UNDP): Guinea | 17 | 0 | 90 |
Recommendations
Datasets & sources
| Dataset | Publisher | Features |
|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 12,782 |
| Global Mangrove Watch: mangrove extent 1996, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 10,056 |
| Global Mangrove Watch: mangrove extent 2007, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 10,621 |
| Global Mangrove Watch: mangrove extent 2010, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 9,643 |
| Global Mangrove Watch: mangrove extent 2015, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 9,715 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 14,142 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 11,330 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 10,949 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 8,659 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 8,465 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 8,516 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Guinea | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 9,393 |
| Fibre Cable Landing Stations | WWF Kenya | 126 |
| Power Plants (Power output MW) | WWF Kenya | 642 |
| Small airport | WWF Kenya | 1,979 |
| Dams | WWF Kenya | 2,586 |
| Districts | WWF Kenya | 6,099 |
| World Database on Protected Areas | WWF Kenya | 7,438 |
| Electricity Transmission Network | WWF Kenya | 9,759 |
| Divisions | WWF Kenya | 17,649 |
| Irrigated Areas | WWF Kenya | 23,095 |
| Agro-Ecological Zones | WWF Kenya | 25,791 |
| Carbon projects: Guinea | Berkeley Carbon Trading Project, University of California, Berkeley | 2 |
| Seagrass (UNEP-WCMC): Guinea | UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT | 2 |
| Community and nature projects (UNDP): Guinea | United Nations Development Programme (UNDP) | 17 |