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ATLAS REPORT
Country report: Comoros
Generated 15 October 2026, 09:36 from live Atlas data
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Executive summary
Atlas holds 58,931 mapped features and 38,022 observations in 23 datasets. The mapped mangrove canopy covers 126 ha in 53 polygons across 1 formation classes; Mangrove dominates with 100.0% of the area. The median patch is only 0.961 ha, while patches of 10 ha or more hold 25.8% 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 | 53 | 126.1 | 100.0% | 2.38 |
Shannon evenness by area: 0.00
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, Comoros | 16 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 1996, Comoros | 18 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2007, Comoros | 16 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2010, Comoros | 17 | 0 | 100 |
| Global Mangrove Watch: mangrove extent 2015, Comoros | 16 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Comoros | 57 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Comoros | 53 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Comoros | 49 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Comoros | 53 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Comoros | 47 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Comoros | 46 | 0 | 100 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Comoros | 42 | 0 | 100 |
| NMC | 1 | 0 | 95 |
| polygons | 11 | 0 | 95 |
| Exclusive Economic Zones (EEZ) | 51 | 0 | 95 |
| Fibre Cable Landing Stations | 126 | 0 | 95 |
| Small airport | 1,979 | 0 | 95 |
| World Database on Protected Areas | 7,438 | 1 | 95 |
| Irrigated Areas | 23,095 | 1 | 95 |
| Agro-Ecological Zones | 25,791 | 17 | 95 |
| Carbon projects: Comoros | 1 | 0 | 90 |
| Seagrass (UNEP-WCMC): Comoros | 1 | 0 | 90 |
| Community and nature projects (UNDP): Comoros | 7 | 0 | 90 |
Recommendations
High 11 of 9 themes have no data yet
Atlas holds no records for: Salt Marsh, Coastal Forests, Blue Carbon, Restoration Sites, Land Use & Land Cover, People & Settlements, Wildlife & Habitats, Fire & Climate, Farming & Livelihoods, Mining, Oil & Licences, Surveys & Field Data. Seagrass and salt marsh would come from UNEP-WCMC global datasets; carbon projects from the Verra and Gold Standard registries; community projects from partner programmes.
Action: Ingest the planned sources listed in the Source Catalogue, starting with Global Mangrove Watch, UNEP-WCMC seagrass and salt marsh, and the carbon registries.
High Net loss of mangrove since 1996
Global Mangrove Watch maps 138 ha of mangrove in Comoros in 1996 and 123 ha in 2025: a net loss of 15 ha (-10.7%), about 1 ha per year. This is the net balance of total mapped area; gains and losses inside the country can cancel out, so real loss may be larger.
Action: Overlay consecutive epochs to locate where the losses occurred and check them against pressures such as clearing, ports and aquaculture.
High Licence terms to be confirmed for 8 datasets
Licence terms are being confirmed with the publisher. Atlas holds the data for scientific and internal use and shows the original attribution, but cannot grant bulk redistribution rights.
Action: Request written permission from WWF Kenya, KMFRI and KFS for redistribution and derivative products.
Medium Most polygons are very small, but most area sits in large stands
18.9% of the 53 mapped polygons are under 0.1 ha, yet patches of 10 ha or more hold 25.8% of all mangrove area. Management and monitoring effort should focus on the large stands, while the small-patch tail needs checking against satellite imagery.
Action: Prioritise field verification of large stands; review the sub-0.1 ha tail for mapping artefacts.
Datasets & sources
| Dataset | Publisher | Features |
|---|---|---|
| Global Mangrove Watch: mangrove extent 2020, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 16 |
| Global Mangrove Watch: mangrove extent 1996, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 18 |
| Global Mangrove Watch: mangrove extent 2007, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 16 |
| Global Mangrove Watch: mangrove extent 2010, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 17 |
| Global Mangrove Watch: mangrove extent 2015, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 16 |
| Global Mangrove Watch v4.1: mangrove extent 2025, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 57 |
| Global Mangrove Watch v4.1: mangrove extent 2020, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 53 |
| Global Mangrove Watch v4.1: mangrove extent 2015, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 49 |
| Global Mangrove Watch v4.1: mangrove extent 2010, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 53 |
| Global Mangrove Watch v4.1: mangrove extent 2005, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 47 |
| Global Mangrove Watch v4.1: mangrove extent 2000, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 46 |
| Global Mangrove Watch v4.1: mangrove extent 1996, Comoros | Global Mangrove Watch (Aberystwyth University, soloEO, Wetlands International, UNEP-WCMC, JAXA) | 42 |
| NMC | WWF Kenya | 1 |
| polygons | WWF Kenya | 11 |
| Exclusive Economic Zones (EEZ) | WWF Kenya | 51 |
| Fibre Cable Landing Stations | WWF Kenya | 126 |
| Small airport | WWF Kenya | 1,979 |
| World Database on Protected Areas | WWF Kenya | 7,438 |
| Irrigated Areas | WWF Kenya | 23,095 |
| Agro-Ecological Zones | WWF Kenya | 25,791 |
| Carbon projects: Comoros | Berkeley Carbon Trading Project, University of California, Berkeley | 1 |
| Seagrass (UNEP-WCMC): Comoros | UN Environment Programme World Conservation Monitoring Centre (UNEP-WCMC) and Short FT | 1 |
| Community and nature projects (UNDP): Comoros | United Nations Development Programme (UNDP) | 7 |
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.