The Lower Guinean forests also known as the Lower Guinean-Congolian forests, are a region of coastal tropical moist broadleaf forest in West Africa, extending along the eastern coast of the Gulf of Guinea from eastern Benin through Nigeria and Cameroon. The Guinean forests encompass a diverse array of vegetation zones that range from humid coastal forests, freshwater swamp forests (such as those found around the Niger Delta), to arid, semi-deciduous forests further inland, characterized by extended periods of dry weather.
The Guinean Forests Hotspot boasts a plethora of ecological characteristics that make it globally exceptional. Notably, the Niger Delta swamp forests rank as the second-largest swamp forest on the African continent, while the Central African Mangroves represent the largest mangrove expanse in Africa. Moreover, the offshore volcanic islands within the hotspot are remarkable for their substantial levels of unique species, particularly considering their size. Additionally, the hotspot contains the Volta River, one of West Africa's largest rivers, and the delta of the Niger River, the longest and most massive river in the region. Furthermore, the Western Equatorial Crater Lakes ecoregion is among those recognized as globally remarkable.
The Dahomey Gap, a region of savanna and dry forest in Togo and Benin, divides the Lower Guinean forests from the Upper Guinean forests to the west, which extend along the western coast of the Gulf of Guinea from Togo to Liberia and north to Guinea. To the north and northeast, the Lower Guinean forests transition to the drier inland Guinean forest–savanna mosaic and Northern Congolian forest–savanna mosaic and to the southeast are bounded by the Congolian Coastal forests, whose boundary is the Sanaga River in Cameroon. The Lower Guinean forests share many biotic affinities with the Upper Guinean forests. They are collectively known as the Guinean Forests of West Africa, location is Sierra Leone.
The Lower Guinean forests, represent a vital ecological region in West and Central Africa. Stretching along the Gulf of Guinea coastline, these forests encompass parts of Nigeria, Cameroon, Equatorial Guinea, Gabon, Congo, the Democratic Republic of Congo (DRC), and smaller portions of neighboring countries. The Lower Guinean forests are globally recognized as a biodiversity hotspot, characterized by their exceptional ecological significance and remarkable species diversity.
Ecoregions
The World Wide Fund for Nature (WWF) divides the Lower Guinean forests into a number of distinct ecoregions:
Nigerian lowland forests (Togo, Nigeria) Niger Delta swamp forests (Nigeria) Cross–Niger transition forests (Nigeria) Cross–Sanaga–Bioko coastal forests (Nigeria, Cameroon, Equatorial Guinea) Cameroonian Highlands forests (Nigeria, Cameroon) Mount Cameroon and Bioko montane forests (Cameroon, Equatorial Guinea) São Tomé, Príncipe, and Annobón moist lowland forests (Equatorial Guinea, São Tomé and Príncipe)
The WWF has designated two regions of the Lower Guinean forests as Global 200 priority regions for conservation. The WWF's "Coastal Congolian forests" region includes the Cross-Sanaga Bioko coastal forests, São Tomé and Príncipe moist lowland forests, and Atlantic Equatorial coastal forests ecoregions. The "Cameroon Highlands forests" Global 200 region includes the Cameroonian Highlands forests and the Mount Cameroon and Bioko montane forests ecoregions.
Geographical Features
Tropical Rainforests
These forests primarily consist of tropical rainforests, characterized by high rainfall, lush vegetation, and a wide variety of plant life. The region's rainfall is relatively evenly distributed throughout the year.
Flora and Fauna
The Guinean Forests Hotspot is renowned for its abundant and distinctive collection of wildlife. A noteworthy characteristic of the fauna within this region is that numerous endemic species have particularly limited distributions within the hotspot, rendering them highly susceptible to the consequences of deforestation. To illustrate, the Upper Guinea Highlands harbor an exceptionally high concentration of endemic bats and amphibians with constrained habitats, all of which are classified as either Critically Endangered or Endangered.
The Lower Guinean forests are recognized as one of the world's biodiversity hotspots. They are home to a vast array of plant and animal species, many of which are endemic.