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69-857: Most of the Afrotropical realm, except for Africa's southern tip, has a tropical climate. A broad belt of deserts , including the Atlantic and Sahara deserts of northern Africa and the Arabian Desert of the Arabian Peninsula , separates the Afrotropic from the Palearctic realm , which includes northern Africa and temperate Eurasia . South of the Sahara , two belts of tropical grassland and savanna run east and west across

138-490: A 2-locular ovary (one is abortive). In response to wounding, the stems of many species will exude aromatic resins . Commiphora can serve as a model genus for understanding plant evolution in the drier regions of the Old World tropics, particularly in eastern continental Africa and Madagascar , where diversity in the genus is concentrated. The closely related sister genus to Commiphora , Bursera , has been used as

207-511: A break in rainfall during mid-season when the Intertropical Convergence Zone or monsoon trough moves poleward of their location during the middle of the warm season; Typical vegetation in these areas ranges from moist seasonal tropical forests to savannahs . When the wet season occurs during the warm season, or summer , precipitation falls mainly during the late afternoon and early evening hours. The wet season

276-470: A broad belt across the continent, south of the rainforests of the Guineo-Congolian region , and north of the deserts of southeastern Africa, the countries are Malawi , Angola , Botswana , Mozambique , Zambia , and Zimbabwe , and the subtropical. Southern Africa contains several deserts. The Namib Desert is one of the oldest deserts in the world and extends for over 2,000 kilometers along

345-524: A lush rainforest. Tropics The tropics are the regions of Earth surrounding the Equator , where the sun may shine directly overhead . This contrasts with the temperate or polar regions of Earth, where the Sun can never be directly overhead. This is because of Earth's axial tilt ; the width of the tropics (in latitude) is twice the tilt. The tropics are also referred to as the tropical zone and

414-579: A model genus to study patterns of evolution in the New World seasonally dry tropical forests . Products from many species of Commiphora have been used for various purposes, sometimes as timber, building material, and natural fencing, but more often valued for the aromatic resins produced by several members of the genus. " Myrrh ", the common name for these dried resins, is fragrant and has been used both as fragrance and for medicinal purposes (e.g., Balsam of Mecca , C. gileadensis ). Use of myrrh resin

483-608: A source of steady income. Land use change spoils entire habitats with the forests. The conversion of forests into timber is another cause of deforestation. Over decades, the primary forest product was commercial timber . Urbanized countries account for a great percentage of the world's wood consumption, which increased greatly between 1950 and 1980. Simultaneously, preservation measures were reinforced to protect European and American forests. Economic growth and growing environmental protection in industrialized European countries caused increased demand for tropical hardwood from West Africa. In

552-463: A special habitat that allows for a diversity of life. The top canopy is home to monkey species like the red colobus , Black-and-white Colobus, and many other Old-World monkey species. Many of these rare and unique species are endangered or critically endangered and need protection from poachers and provided ample habitat to thrive. In Tropical Africa, about 8,500 plant species have been documented, including 403 orchid species. Species unfamiliar with

621-500: Is a time when air quality improves, freshwater quality improves and vegetation grows significantly due to the wet season supplementing flora, leading to crop yields late in the season. Floods and rains cause rivers to overflow their banks, and some animals to retreat to higher ground. Soil nutrients are washed away and erosion increases. The incidence of malaria increases in areas where the rainy season coincides with high temperatures. Animals have adaptation and survival strategies for

690-596: Is frequent and pronounced throughout historical texts of cultural significance, including the Bible . An ancient seed recovered from an archaeological site in the Judean Desert has been confirmed to be a member of Commiphora . The 1,000-year-old seed has produced a tree growing at Louis Borick Natural Medicine Research Center. Studies using DNA sequence data have confirmed the monophyly of Commiphora ; however, this data suggests that previous classification of

759-429: Is generally believed that firewood provides 75% of the energy used in sub-Sahara Africa. With the high demand, the consumption of wood for fuel exceeds the renewal of forest cover . Other observed changes in these forests are forest disintegration (changing the spatial continuity and creating a mosaic of forest blocks and other land cover types), and selective logging of woody species for profitable purposes that affect

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828-751: Is home to several endemic plant families. Madagascar and the Indian Ocean Islands are home to ten endemic families of flowering plants; eight are endemic to Madagascar ( Asteropeiaceae , Didymelaceae , Didiereaceae , Kaliphoraceae , Melanophyllaceae , Physenaceae , Sarcolaenaceae , and Sphaerosepalaceae ), one to Seychelles ( Mesdusagynaceae ), and one to the Mascarene Islands ( Psiloxylaceae ). Twelve plant families are endemic or nearly endemic to South Africa (including Curtisiaceae , Heteropyxidaceae , Penaeaceae , Psiloxylaceae , and Rhynchocalycaceae ) of which five are endemic to

897-687: Is rich in terms of biodiversity. Tropical African forest is 18 percent of the world's total and covers over 3.6 million square kilometers of land in West, East, and Central Africa. This total area can be subdivided to 2.69 million square kilometers (74%) in Central Africa, 680,000 square kilometers (19%) in West Africa, and 250,000 square kilometers (7%) in East Africa . In West Africa , a chain of rain forests up to 350 km long extends from

966-585: Is that the tropics represent a ' Garden of Eden ', a heaven on Earth, a land of rich biodiversity or a tropical paradise. The alternative is that the tropics consist of wild, unconquerable nature. The latter view was often discussed in old Western literature more so than the first. Evidence suggests over time that the view of the tropics as such in popular literature has been supplanted by more well-rounded and sophisticated interpretations. Western scholars tried to theorise why tropical areas were relatively more inhospitable to human civilisations than colder regions of

1035-399: Is the most species-rich genus of flowering plants in the frankincense and myrrh family, Burseraceae . The genus contains approximately 190 species of shrubs and trees , which are distributed throughout the (sub-) tropical regions of Africa , the western Indian Ocean islands, the Arabian Peninsula , India , and South America . The genus is drought-tolerant and common throughout

1104-605: The Andes as far south as the northernmost parts of Chile and Perú . The climate is changing in the tropics, as it is in the rest of the world. The effects of steadily rising concentrations of greenhouse gases on the climate may be less obvious to tropical residents, however, because they are overlain by considerable natural variability. Much of this variability is driven by the El Niño-Southern Oscillation (ENSO) . The Tropics has warmed by 0.7–0.8 °C over

1173-535: The Bible as the source of a medicinal extract called tsori . Leaves in Commiphora are pinnately compound (or very rarely unifoliolate). Many species are armed with spines . Bark is often exfoliating , peeling in thin sheets to reveal colorful, sometimes photosynthetic , bark below. Stems are frequently succulent , especially in species native to drier environments. Flowers are typically dioecious ( subdioecious ) and fruits are drupes , usually with

1242-453: The Cape floristic province (including Grubbiaceae ). Other endemic Afrotropic families include Barbeyaceae , Dirachmaceae , Montiniaceae , Myrothamnaceae , and Oliniaceae . The East African Great Lakes ( Victoria , Malawi , and Tanganyika ) are the center of biodiversity of many freshwater fishes, especially cichlids (they harbor more than two-thirds of the estimated 2,000 species in

1311-732: The Pantropic . The system of biogeographic realms differs somewhat; the Neotropical realm includes both the Neotropics and temperate South America, and the Paleotropics correspond to the Afrotropical , Indomalayan , Oceanian , and tropical Australasian realms . Flora are plants found in a specific region at a specific time. Some well-known plants that are exclusively found in, originate from, or are often associated with

1380-653: The Sudd wetland in South Sudan , and the Niger Inland Delta in Mali . The forest-savanna mosaic is a transitional zone between the grasslands and the belt of tropical moist broadleaf forests near the equator . South Arabia, which includes Yemen and parts of western Oman and southwestern Saudi Arabia , has few permanent forests. Some of the notable ones are Jabal Bura , Jabal Raymah , and Jabal Badaj in

1449-579: The Waterberg Biosphere of South Africa , and eastern Madagascar rainforests. Often the soils of tropical forests are low in nutrient content, making them quite vulnerable to slash-and-burn deforestation techniques, which are sometimes an element of shifting cultivation agricultural systems. In biogeography , the tropics are divided into Paleotropics (Africa, Asia and Australia) and Neotropics (Caribbean, Central America, and South America). Together, they are sometimes referred to as

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1518-719: The axial tilt of the Earth . The Tropic of Cancer is the Northernmost latitude from which the Sun can ever be seen directly overhead , and the Tropic of Capricorn is the Southernmost. This means that the tropical zone includes everywhere on Earth which is a subsolar point at least once during the solar year . Thus the maximum latitudes of the tropics have equal distances from the equator on either side. Likewise, they approximate

1587-427: The indigenous peoples of Africa who have occupied them for millennia. Many African countries are in economic and political change, overwhelmed by conflict, making various movements of forest exploitation to maintain forest management and production more and more complicated. Forest legislation of ATO member countries aims to promote the balanced utilization of the forest domain and of wildlife and fishery to increase

1656-843: The proteas ( Proteaceae ) that are also found in the Australasian realm . Madagascar and neighboring islands form a distinctive sub-region of the realm, with numerous endemic taxa , such as lemurs . Madagascar and the Granitic Seychelles are old pieces of the ancient supercontinent of Gondwana , and broke away from Africa millions of years ago. Other Indian Ocean islands , like the Comoros and Mascarene Islands , are volcanic islands that formed more recently. Madagascar contains various plant habitats, from rainforests to mountains and deserts, as its biodiversity and ratio of endemism are extremely high. The Afrotropical realm

1725-1018: The secretary bird (Sagittariidae), guineafowl (Numididae), and mousebirds (Coliidae). Several families of passerines are limited to the Afrotropics, including rock-jumpers (Chaetopidae) and rockfowl (Picathartidae). Africa has three endemic orders of mammals, the Tubulidentata ( aardvarks ), Afrosoricida ( tenrecs and golden moles ), and Macroscelidea ( elephant shrews ). The East-African plains are well known for their diversity of large mammals. Four species of great apes ( Hominidae ) are endemic to Central Africa: both species of gorilla ( western gorilla , Gorilla gorilla , and eastern gorilla , Gorilla beringei ) and both species of chimpanzee ( common chimpanzee , Pan troglodytes , and bonobo , Pan paniscus ). Humans and their ancestors originated in Africa. The tropical environment

1794-773: The torrid zone (see geographical zone ). Due to the overhead sun, the tropics receive the most solar energy over the course of the year, and consequently have the highest temperatures on the planet. Even when not directly overhead, the sun is still close to overhead throughout the year, therefore the tropics also have the lowest seasonal variation on the planet; "winter" and "summer" lose their contrast. Instead, seasons are more commonly divided by precipitation variations than by temperature variations. The tropics maintain wide diversity of local climates, such as rain forests , monsoons , savannahs , deserts , and high altitude snow-capped mountains . The word "tropical" can specifically refer to certain kinds of weather , rather than to

1863-410: The xerophytic scrub , seasonally dry tropical forests , and woodlands of these regions. The common name myrrh refers to several species of the genus, from which aromatic resins are derived for various fragrance and medicinal uses by humans. A previously unknown species belonging to this genus has been grown from a single ancient seed and tentatively identified as the biblical plant mentioned in

1932-591: The Atlantic coasts of Angola , Namibia , and South Africa . It is characterized by towering dunes and a diversity of endemic wildlife. Further inland concerning the Namib Desert, the Kalahari Desert is a semi-arid savanna spanning Botswana , Namibia , and South Africa . The Kalahari is known for its diversity of mineral resources, particularly diamonds , as well as a variety of flora. South of

2001-737: The Indian Ocean coast, from southern Somalia to South Africa . In northeastern Africa, semi-arid Acacia-Commiphora woodlands, savannas, and bushlands are the dominant plant communities. This region is called the Somali-Masai center of endemism or Somali-Masai region. It extends from central Tanzania northwards through the Horn of Africa and covers portions of Tanzania , Kenya , Ethiopia , Somalia , Djibouti , and Eritrea . Thorny, dry-season deciduous species of Vachellia and Senegalia (formerly Acacia ) and Commiphora are

2070-754: The Namib and Kalahari deserts is the Karoo . A semi-desert natural region, the Karoo desert spans across parts of the Western and Eastern Cape in South Africa and contains vast open spaces and unique vegetation, such as certain species of Asteraceae flowering plants. Within the boundaries of the larger Karoo, the Tankwa Karoo is a more arid sub-region known for harsher conditions and starker landscapes. Further to

2139-551: The Northern Hemisphere. A popular explanation focused on the differences in climate. Tropical jungles and rainforests have much more humid and hotter weather than colder and drier temperaments of the Northern Hemisphere, giving to a more diverse biosphere. This theme led some scholars to suggest that humid hot climates correlate to human populations lacking control over nature e.g. 'the wild Amazonian rainforests'. Commiphora ca. 190. See text. Commiphora

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2208-520: The Yemeni highland escarpment and the seasonal forests in eastern Yemen and the Dhofar region of Oman. Other woodlands that scatter the land are small, predominantly Juniperus or Vachellia forests. The forest zone , a belt of lowland tropical moist broadleaf forests , runs across most of equatorial Africa's Intertropical Convergence Zone . The Upper Guinean forests of West Africa extend along

2277-399: The angle of the Earth's axial tilt. This angle is not perfectly fixed, mainly due to the influence of the moon, but the limits of the tropics are a geographic convention, and their variance from the true latitudes is very small. Many tropical areas have both a dry and a wet season. The wet season , rainy season or green season is the time of year, ranging from one or more months when most of

2346-566: The annual mean air temperature on land—based on molecules from the cell membrane of soil-inhabiting bacteria. Scientists from the NIOZ, Royal Netherlands Institute for Sea Research conducted a temperature record dating back to 25,000 years ago. In concordance with their German colleagues at the University of Bremen , this detailed record shows the history of land temperatures based on the molecular fossils of soil bacteria. When applying this to

2415-553: The annual pace of deforestation in the region can vary from 150 km (58 sq mi) in Gabon to 2,900 km (1,100 sq mi) in Côte d'Ivoire . The remaining tropical forests still cover major areas in Central Africa but are abridged by patches in West Africa. The African Timber Organization member countries eventually recognized the cooperation between rural people and their forest environment. Customary law gives residents

2484-512: The atmosphere, and lessen the planet's ability to store excess carbon . The rainforest vegetation of the Guinea-Congolian transition area, extending from Senegal to western Uganda is constituted of two main types: The semi-deciduous rainforest is characterized by a large number of trees whose leaves are left during the dry season. It appears in areas where the dry period (rainfall below about 100  mm) reaches three months. Then,

2553-459: The average annual rainfall in a region falls. Areas with wet seasons are disseminated across portions of the tropics and subtropics , some even in temperate regions. Under the Köppen climate classification , for tropical climates , a wet-season month is defined as one or more months where average precipitation is 60 mm (2.4 in) or more. Some areas with pronounced rainy seasons see

2622-585: The changes in forest structure for industrial use might not survive. If timber use continues and an increasing amount of farming occurs, it could lead to the mass killing of animal species. The home of nearly half of the world's animals and plant species are tropical rainforests. The rainforests provide economic resources for over-populated developing countries. Despite the stated need to save the West African forests, there are varied opinions on how best to accomplish this goal. In April 1992, countries with some of

2691-837: The coast from Guinea to Togo . The Dahomey Gap , a zone of forest-savanna mosaic that reaches to the coast, separates the Upper Guinean forests from the Lower Guinean forests , which extend along the Gulf of Guinea from eastern Benin through Cameroon and Gabon to the western Democratic Republic of the Congo . The largest tropical forest zone in Africa is the Congolian forests of the Congo Basin in Central Africa. A belt of tropical moist broadleaf forest also runs along

2760-416: The coasts of Sierra Leone, Liberia , Ivory Coast , Ghana, continuing through Togo, Benin , Nigeria and Cameroon, and ending at the Congo Basin . Rainforests such as these are the richest, oldest, most prolific, and most complex systems on Earth, are dying, and in turn, are upsetting the delicate ecological balance. This may disturb global hydrological cycles , release vast amounts of greenhouse gases into

2829-768: The continent, from the Atlantic Ocean to the Ethiopian Highlands . Immediately south of the Sahara lies the Sahel belt, a transitional zone of semi-arid short grassland and vachellia savanna. Rainfall increases further south in the Sudanian Savanna , also known simply as the Sudan region , a belt of taller grasslands and savannas . The Sudanian Savanna is home to two great flooded grasslands :

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2898-437: The different molecules from the algal cell membrane can approximate the past temperature of the sea surface. The new “proxy” used in this sediment core obtained both a continental and a sea surface temperature record. In comparison, both records show that ocean surface and land temperatures behaved differently during the past 25,000 years. During the last ice age, African temperatures were 21 °C, about 4 °C lower than today, while

2967-916: The dominant trees, growing in open-canopied woodlands, open savannas, dense bushlands, and thickets . This region includes the Serengeti ecosystem, which is renowned for its wildlife. The Afromontane region extends from the Ethiopian Highlands to the Drakensberg Mountains of South Africa, including the East African Rift . This region is home to distinctive flora, including Podocarpus and Afrocarpus , as well as giant Lobelias and Senecios . The Zambezian region includes woodlands, savannas, grasslands, and thickets. Characteristic plant communities include Miombo woodlands , drier mopane and Baikiaea woodlands, and higher-elevation Bushveld . It extends from east to west in

3036-560: The eastern border of Sierra Leone to Ghana . In Ghana, the forest zone gradually dispels near the Volta river , following a 300  km stretch of Dahomey savanna gap. The rain forest of West Africa continues from east of Benin through southern Nigeria and officially ends at the border of Cameroon along the Sanaga river . Semi-deciduous rainforests in West Africa begin at the fringed coastline of Guinea Bissau (via Guinea) and run through

3105-461: The evergreen or the semi-evergreen rainforest climatically adapted to somewhat more humid conditions than the semi-deciduous type and is usually there in areas where the dry period is shorter than two months. This forest is usually richer in legumes and a variety of species and its maximum development is around the Bight of Biafra , from Eastern Nigeria to Gabon, and with some large patches leaning to

3174-417: The family). The West African coastal rivers region covers only a fraction of West Africa, but harbors 322 of West Africa's fish species, with 247 restricted to this area and 129 restricted even to smaller ranges. The central rivers fauna comprise 194 fish species, with 119 endemics and only 33 restricted to small areas. The Afrotropic has various endemic bird families, including ostriches (Struthionidae),

3243-648: The first half of the 1980s, an annual forest loss of 7,200 km (2,800 sq mi) was noted down along the Gulf of Guinea , a figure equivalent to 4-5 percent of the total remaining rainforest area. By 1985, 72% of West Africa's rainforests had been transformed into fallow lands and an additional 9% had been opened up by timber exploitation. Tropical timber was used in Europe following World War II , as trade with East European countries stopped and timber noticeably became sparse in western and southern Europe . Despite efforts to promote lesser-known timber species use,

3312-780: The forest subfloor and the biodiversity. The rainforests that remain in West Africa now greatly differ in condition from their state 30 years ago. In Guinea, Liberia, and the Ivory Coast, there is almost no primary forest cover left unscathed; in Ghana, the situation is much worse, and nearly all of the rainforest is being removed. Guinea-Bissau loses 200 to 350 km (77 to 135 sq mi) of forest yearly, Senegal 500 km (190 sq mi) of wooded savanna, and Nigeria 6,000,050,000 of both. Liberia loses 800 km (310 sq mi) of forests each year. Extrapolating from present rates of loss, botanist Peter Raven pictures that

3381-460: The geographic region; these usages ought not be confused. The Earth's axial tilt is currently around 23.4° , and therefore so are the latitudes of the tropical circles , marking the boundary of the tropics: specifically, ±23°26′09.8″ (or 23.43605°). The northern one is called the Tropic of Cancer , and the southern is the Tropic of Capricorn . As the Earth's axial tilt changes, so too do

3450-511: The input of the forest sector to the economic, social, cultural, and scientific development of the country. The rate of deforestation in Africa is less known than the rate of other tropical regions. A lack of dependable data and survey information in some countries has made change in areas of unbroken forest difficult to ascertian. The cultivation of various cash crops has led to forest depletion. West African countries depend on products like gum, copal , rubber , cola nuts , and palm oil as

3519-469: The largest surviving tropical rainforests banned a rainforest protection plan proposed by the British government . It aimed at finding endangered species of tropical trees to control their trade. Experts estimate that the rainforest of West Africa, at the present rate of deforestation , may disappear by the year 2020. Africa's rainforest, like many others emergent in the world, has a special significance to

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3588-961: The last century—only slightly less than the global average—but a strong El Niño made 1998 the warmest year in most areas, with no significant warming since. Climate models predict a further 1–2 °C warming by 2050 and 1–4 °C by 2100. Tropical plants and animals are those species native to the tropics. Tropical ecosystems may consist of tropical rainforests , seasonal tropical forests , dry (often deciduous) forests , spiny forests, deserts , savannahs, grasslands and other habitat types. There are often wide areas of biodiversity , and species endemism present, particularly in rainforests and seasonal forests. Some examples of important biodiversity and high-endemism ecosystems are El Yunque National Forest in Puerto Rico , Costa Rican and Nicaraguan rainforests, Amazon Rainforest territories of several South American countries, Madagascar dry deciduous forests ,

3657-570: The majority of the world's moderate and smaller rainforests (such as in Africa) could be destroyed in forty years. Tropical Africa comprises 18% of the world's total land area covering 20 million km (7.7 million sq mi) of land in West and Central Africa. The region has been facing deforestation in various degrees of intensity throughout the recent decades. The actual rate of deforestation varies from one country to another and accurate data does not exist yet. Recent estimates show that

3726-402: The market continued to focus on part of the usable timber obtainable. West Africa was prone to selective harvesting practices; while conservationists blamed the timber industry and the farmers for felling trees, others believe rainforest destruction is connected to the problem of fuel wood. The contribution of fuel wood consumption to tree stock decline in Africa is believed to be significant. It

3795-578: The outflow core of the Congo River , the core contained eroded land material and microfossils from marine algae. That concluded that the land environment of tropical Africa cooled more than the bordering Atlantic Ocean during the last ice age. Since the Congo River drains a large part of tropical central Africa, the land-derived material gives an integrated signal for a very large area. These findings further enlighten natural disparities in climate and

3864-579: The possible costs of a warming earth on precipitation in central Africa. Scientists discovered a way to measure sea temperature—based on organic molecules from algae growing off the surface layer of the Ocean. These organisms acclimatize the molecular composition of their cell membranes to ambient temperature to sustain regular physiological properties. If such molecules sink to the sea floor and are buried in sediments where oxygen does not go through, they can be preserved for thousands of years. The ratios between

3933-418: The process. The species that compose African rainforests are of different evolutionary ages because of the contraction and expansion of the rainforest in response to global climatic fluctuations. The pygmy hippopotamus , the giant forest hog , the water chevrotain , insectivores , rodents, bats, tree frogs, and bird species inhabit the forest. These species, along with a diversity of fruits and insects, make

4002-414: The right to use trees for firewood, fell trees for construction, and collect of forest products and rights for hunting or fishing and grazing or clearing of forests for maintenance agriculture. Other areas are called "protected forests", which means that uncontrolled clearings and unauthorized logging are forbidden. After World War II, commercial exploitation increased until no West African forestry department

4071-411: The tropical Atlantic Ocean was only about 2.5 °C cooler. Lead author Johan Weijers and his colleagues concluded that the land-sea temperature difference has by far the largest influence on continental rainfall. The relation of air pressure to temperature strongly determines this factor. During the last ice age , the land climate in tropical Africa was drier than it is now, whereas it favors the growth of

4140-516: The tropical and polar circles . The tropics constitute 39.8% of Earth's surface area and contain 36% of Earth's landmass . As of 2014 , the region was home also to 40% of the world's population , and this figure was then projected to reach 50% by 2050. Because of global warming , the weather conditions of the tropics are expanding with areas in the subtropics , having more extreme weather events such as heatwaves and more intense storms. These changes in weather conditions may make certain parts of

4209-469: The tropics include: Tropicality refers to the image of the tropics that people from outside the tropics have of the region, ranging from critical to verging on fetishism. Tropicality gained renewed interest in geographical discourse when French geographer Pierre Gourou published Les pays tropicaux ( The Tropical World in English), in the late 1940s. Tropicality encompassed two major images. One,

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4278-568: The tropics uninhabitable. The word "tropic" comes via Latin from Ancient Greek τροπή ( tropē ), meaning "to turn" or "change direction". The tropics are defined as the region between the Tropic of Cancer in the Northern Hemisphere at 23°26′09.8″ (or 23.43605°) N and the Tropic of Capricorn in the Southern Hemisphere at 23°26′09.8″ (or 23.43605°) S; these latitudes correspond to

4347-498: The west from Ghana to Liberia and to the east of Zaïre-Congo basin. Among rainforest areas in other continents, most of the African rainforest is comparatively dry and receives between 1600 and 2000 mm of rainfall per year. Areas receiving more rain than this mainly are in coastal areas. The circulation of rainfall throughout the year remains less than in other rainforest regions in the world. The average monthly rainfall in nearly

4416-439: The west, the Richtersveld , a mountainous desert in the northwestern corner of South Africa, presents a rugged landscape. It is celebrated as a UNESCO World Heritage Site for its unique biodiversity and cultural significance to the local Nama people . The Cape floristic region at Africa's southern tip is a Mediterranean climate region that is home to a significant number of endemic taxa , as well as to plant families like

4485-548: The wetter regime. The previous dry season leads to food shortages into the wet season, as the crops have yet to mature. However, regions within the tropics may well not have a tropical climate. Under the Köppen climate classification, much of the area within the geographical tropics is classed not as "tropical" but as "dry" ( arid or semi-arid ), including the Sahara Desert , the Atacama Desert and Australian Outback . Also, there are alpine tundra and snow-capped peaks, including Mauna Kea , Mount Kilimanjaro , Puncak Jaya and

4554-617: The whole region remains under 100  mm throughout the year. The variety of the African rainforest flora is also less than the other rainforests. This lack of flora has been credited to several reasons such as the gradual infertility since the Miocene , severe dry periods during Quaternary , or the refuge theory of the cool and dry climate of tropical Africa during the last severe ice age of about 18,000 years ago. The Tropical African rainforest has rich fauna, commonly smaller mammal species rarely seen by humans. New species are being discovered. For instance, in late 1988 an unknown shrub species

4623-480: Was able to make the law. By comparison with rainforests in other places of the world in 1973, Africa showed the greatest infringement though in total volume means, African timber production accounted for just one-third compared to that of Asia . The difference was due to the variety of trees in Africa forests and the demand for specific wood types in Europe. Forestry regulations in East Africa were first applied by colonial governments. The Tropical Forestry Action Plan

4692-559: Was conceived in 1987 by the World Resources Institute in cooperation with the Food and Agriculture Organization , the United Nations Development Program , and the World Bank with hopes of halting tropical forest destruction. In its bid to stress forest conservation and development, the World Bank provided $ 111,103 million to developing countries, especially in Africa, to help in developing long-range forest conservation and management programs meant for ending deforestation. In early 2007, scientists created an entirely new proxy to determine

4761-439: Was discovered on the shores of the Median River in Western Cameroon. Since then many species have become extinct. However, undisturbed rainforests are some of the richest habitats for animal species. Today, undisturbed rainforests are remnant but rare. Timber extraction not only changes the edifice of the forest, but it also affects the tree species spectrum by removing economically important species and terminating other species in

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