Congolian rainforests

The Congolian rainforests are a massive belt of lowland tropical moist broadleaf forests.

This ecosystem stretches across the basin of the Congo River and its many tributaries in Central Africa. It is the second-largest tropical forest on Earth, surpassed only by the Amazon rainforest. This vast forest covers parts of six different countries. It contains one quarter of the world's remaining tropical forests. Because of its size and role in the environment, it is considered a global 200 ecoregion.

The forest is a complex system of different environments. To the north, south, and southwest, the moist rainforest transitions into a forest-savanna mosaic. This mosaic consists of drier forests, savannas, and grasslands. To the west, the area meets the coastal Lower Guinean forests. These coastal forests extend from southwestern Cameroon into southern Nigeria and Benin. To the east, the lowland forests change into the highland Albertine Rift montane forests. These mountains line the Albertine Rift, which is a branch of the East African Rift system.

Scientists divide the Congolian forests into six distinct ecoregions. These help us understand the specific characteristics of different areas. The Atlantic Equatorial coastal forests span Angola, Cameroon, Republic of the Congo, Democratic Republic of the Congo, Equatorial Guinea, and Gabon. The Central Congolian lowland forests are located in the Democratic Republic of the Congo. There are also Eastern Congolian swamp forests and Western Congolian swamp forests. Both of these swamp regions are found within the Democratic Republic of the Congo and the Republic of the Congo. Finally, the Northeastern Congolian lowland forests cover the Central African Republic and the Democratic Republic of the Congo.

The biodiversity within these forests is incredibly high. The region contains more than 10,000 species of plants and over 10,000 species of animals. About 30% of the plant species are endemic, meaning they are found nowhere else on Earth.

There are over 400 species of mammals living here. This includes African forest elephants, African bush elephants, and leopards. You can also find bongos, red river hogs, and chimpanzees. The okapi is a unique animal endemic to the northeastern Congolian rainforests.

Primate life is very diverse, including bonobos, mountain gorillas, and western lowland gorillas. The western lowland gorilla is one of the world's most threatened primate species.

Birds and fish also thrive in this massive ecosystem. There are 1,000 native species of birds, such as the grey parrot, brown nightjar, and the bat hawk. In the waters, 700 species of fish live, including the Nile tilapia, Nile perch, and the giraffe catfish.

One of the most important parts of the ecosystem is the central Congo Basin. This area contains one of the world's largest tropical peatlands. These peat swamp forests extend along both sides of the Congo River. They store approximately 29 billion tons of carbon. This amount of carbon is equivalent to about three years of global greenhouse gas emissions.

Despite its importance, the rainforest faces many serious threats. Commercial logging and mining cause the destruction and fragmentation of forests. Large oil palm plantations also take up space previously held by trees. The bushmeat trade and poaching are also depleting the wildlife populations.

In the 2000s, the annual forest loss was 0.3%, which was the lowest rate among major tropical forests. However, the situation has changed recently. Between 2015 and 2019, the deforestation rate in the Democratic Republic of the Congo doubled. In 2021, the deforestation of the Congolian rainforest increased by 5%. Over the past 20 years, 17.1 million hectares of forest have been lost.

The health of the Congolian rainforest is closely tied to the global environment. The massive amount of carbon stored in the peatlands helps regulate the planet. When these forests are lost, that stored carbon can be released. This makes the protection of the Congo Basin a vital task for the whole world. Understanding the different ecoregions and species helps scientists track these changes. Protecting the habitat of the western lowland gorilla and the okapi is also a key part of conservation efforts.