Deforestation, clearance, clearcutting or clearing is the removal of a forest or stand of trees from land which is then converted to a non-forest use. Deforestation can involve conversion of forest land to farms, ranches, or urban use. The most concentrated deforestation occurs in tropical rainforests. About 31% of Earth's land surface is covered by forests.
Rainforests are forests characterized by high rainfall, with annual rainfall in the case of tropical rainforests between 250 and 450 centimetres, and definitions varying by region for temperate rainforests. The monsoon trough, alternatively known as the intertropical convergence zone, plays a significant role in creating the climatic conditions necessary for the Earth's tropical rainforests.
The kola nut is the fruit of the kola tree, a genus (Cola) of trees that are native to the tropical rainforests of Africa. The caffeine-containing fruit of the tree is used as a flavoring ingredient in beverages, and is the origin of the term "cola".
Tropical rainforests are rainforests that occur in areas of tropical rainforest climate in which there is no dry season – all months have an average precipitation of at least 60 mm – and may also be referred to as lowland equatorial evergreen rainforest. True rainforests are typically found between 10 degrees north and south of the equator ; they are a sub-set of the tropical forest biome that occurs roughly within the 28 degree latitudes. Within the World Wildlife Fund's biome classification, tropical rainforests are a type of tropical moist broadleaf forest that also includes the more extensive seasonal tropical forests.
Strychnos spinosa is a tree indigenous to tropical and subtropical Africa. It produces, sweet-sour, yellow fruits, containing numerous hard brown seeds. Greenish-white flowers grow in dense heads at the ends of branches. The fruits tend to appear only after good rains. It is related to the deadly Strychnos nux-vomica, which contains strychnine. The smooth, hard fruit are large and green, ripen to yellow colour. Inside the fruit are tightly packed seeds, which may be toxic, surrounded by a fleshy, brown, edible covering. Animals such as baboon, monkeys, bushpig, nyala and eland eat the fruit. The leaves are a popular food source for browsers such as duiker, kudu, impala, steenbok, nyala and elephant.
Terminalia schimperiana is a species of Terminalia, native to tropical Africa from Guinea and Sierra Leone east to Uganda and Ethiopia.
Although tropical Africa is mostly familiar to the West for its rainforests, this ecozone of Africa is far more diverse. While the tropics are thought of as regions with warm to hot moist climates caused by latitude and the tropical rain belt, the geology of areas, particularly mountain chains, and geographical relation to continental and regional scale winds impact the overall parts of areas, also, making the tropics run from arid to humid in West Africa. The area has very serious overpopulation problems.
The wildlife of Nigeria consists of the flora and fauna of this country in West Africa. Nigeria has a wide variety of different habitats, ranging from mangrove swamps and tropical rainforest to savanna with scattered clumps of trees. About 290 species of mammal and 940 species of bird have been recorded in the country.
Khaya ivorensis, also called African mahogany or Lagos mahogany, is a tall forest tree with a buttressed trunk in the family Meliaceae. It is found in Angola, Cameroon, Côte d'Ivoire, Gabon, Ghana, Liberia, and Nigeria where it grows primarily in lowland tropical rainforests. It is threatened by habitat loss.
Rinorea is a genus of plant in family Violaceae.
Rinorea deflexa is a species of plant in the Violaceae family. It is endemic to Ecuador. Its natural habitat is subtropical or tropical dry forests.
Rinorea fausteana is a species of plant in the Violaceae family. It is endemic to Cameroon. Its natural habitats are subtropical or tropical moist lowland forests and subtropical or tropical moist montane forests. It is threatened by habitat loss.
Anogeissus leiocarpa is a tall deciduous tree native to the savannas of tropical Africa. It is the sole West African species of the genus Anogeissus, a genus otherwise distributed from tropical central and east Africa through tropical Southeast Asia. A. leiocarpa germinates in the new soils produced by seasonal wetlands and grows at the edges of the rainforest, although not in the rainforest, in the savanna, and along riverbanks forming gallery forests. The tree flowers in the rainy season, from June to October. The seeds, winged samaras, are dispersed by ants.
The Nigeria-Cameroon chimpanzee is a subspecies of the common chimpanzee which inhabits the rainforests along the border of Nigeria and Cameroon. Male Nigeria-Cameroon chimpanzees can weigh as much as 70 kilos with a body length of up to 1.2 metres and a height of 1.6 metres. Females are significantly smaller.
Christella dentata is a small fern with widespread distribution in Australia and islands in the south Pacific Ocean. There are many local common names. In New South Wales it grows north from the southern Illawarra region and is known as binung.
The Cross River National Park is a national park of Nigeria, located in Cross River State, Nigeria. There are two separate sections, Okwangwo and Oban . The park has a total area of about 4,000 km2, most of which consists of primary moist tropical rainforests in the North and Central parts, with mangrove swamps on the coastal zones. Parts of the park belong to the Guinea-Congolian region, with a closed canopy and scattered emergent trees reaching 40 or 50 meters in height.
Cinnamomum mercadoi (kalingag) is a small tree, about 6 to 10 metres high, with a thick, aromatic bark. The plant part of the family Lauraceae, which contains about 45 genera and 2000-2500 species, and is related to the culinary cinnamon, sassafras, and bay tree. The plant is indigenous to the Philippines, where it grows best in forests at low and medium altitudes that sometimes ascend to 2,000 metres (6,600 ft). C. mercadoi is unusual in the cinnamon family in that its essential oil consists large amounts of safrol, whereas other oils of cinnamon contain cinnamaldehyde. It is currently listed in the International Union for Conservation of Nature (IUCN) Red List as "vulnerable" due to the overharvesting and the continuous loss of the Philippine forests.
Thonningia is a monotypic genus of flowering plants in the family Balanophoraceae containing the single species Thonningia sanguinea. It is distributed throughout much of southern and western Africa, particularly the tropical regions. Common names for the plant include ground pineapple. A familiar plant to humans, it has an extremely long list of common names in many African languages. Many names are inspired by the resemblance of the plant's inflorescence to a pineapple or palm tree. Some of the names can be translated as pineapple of the bush, duiker's kolanut, and crown of the ground.
Anisopus mannii is a perennial herbaceous shrub in the subfamily Asclepiadoideae of the family Apocynaceae — commonly referred to as the dogbane family. The flowering species grows in the tropical environments of central Africa, and is renown in traditional Nigerian medicine for treating sexual impotence, the common cold, diarrhea, and most notably, its potent hypoglycemic effect. Recent research has been conducted, looking in to the species' potential anti-diabetic, anti-inflammatory, analgesic, antimicrobial, and antioxidant bioactivities and mechanisms of action.
Omo Forest Reserve is a preserved area of tropical rainforest in the Nigerian state of Ogun, in the south-west part of the country. It is located about 135 km (84 mi) northeast of Lagos and 80 km (50 mi) east of Ijebu Ode. This nature reserve covers an area of 130,500 hectares. The average rainfall is around 2,000 mm (80 in). The terrain is largely flat and well-drained, with some low rolling hills, and forms part of the Omo River watershed.
