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  1. Geography of Nigeria - Wikipedia

    Nigeria is a country in West Africa. It shares land borders with the Republic of Benin to the west, Chad and Cameroon to the east, and Niger to the north. Its coast lies on the Gulf of Guinea in the south and it borders Lake Chad to the northeast. Notable geographical features in Nigeria include the Adamawa Plateau, Mambilla Plateau, Jos Plateau, Obudu Plateau, the Niger River, Benue River, and Niger Delta.

    Nigeria is a country in West Africa. It shares land borders with the Republic of Benin to the west, Chad and Cameroon to the east, and Niger to the north. Its coast lies on the Gulf of Guinea in the south and it borders Lake Chad to the northeast. Notable geographical features in Nigeria include the Adamawa Plateau, Mambilla Plateau, Jos Plateau, Obudu Plateau, the Niger River, Benue River, and Niger Delta.

    Nigeria is in the tropics, where the climate is very humid and seasonally wet. Nigeria has majorly four climate types; these climate types are generally gradated from south to north. Nigeria's principal streams are the Niger, from which it got its name, and the Benue, the primary tributary of the Niger. The country's most elevated point is Chappal Waddi (or Gangirwal) at 2,419 metres or 7,936 feet, situated in the Adamawa mountains in the Gashaka-Gumti Public Park, Taraba State, on the border with Cameroon.

    The capital of Nigeria is Abuja, situated in the centre of the country, while Lagos is the country's major port, monetary ce…

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    Area Total: 923,768 km (356,669 sq mi) country rank in the world: 31st Land: 910,770 km (351,650 sq mi) Water: 13,000 km (5,000 sq mi)

    Area comparative Australia comparative: slightly smaller than South Australia Canada comparative: slightly smaller than British Columbia United States comparative: slightly less than three times the size of New Mexico

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    The tropical monsoon climate, designated by the Köppen climate classification as Am, is found in the southern part of the country. This climate is influenced by the monsoons originating from the South Atlantic Ocean, which are brought into the country by the (maritime tropical) MT air mass, a warm moist sea-to-land seasonal wind. Its warmth and high humidity gives it a strong tendency to ascend and produce copious rainfall, which is a result of the condensation of water vapour in the rapidly rising air. The tropical monsoon climate has a very small temperature range. The temperature ranges are almost constant throughout the year; for example, Warri in the southern part of Nigeria records a maximum of 28 °C (82.4 °F) for its hottest month while its lowest temperature is 26 °C (78.8 °F) in its coldest month.

    The southern part of Nigeria experiences heavy and abundant rainfall. These storms are usually convectional in nature because of the region's proximity to the equatorial belt. The annual rainfall received in this region is very high. Parts of the Niger Delta receives over 4,000 millimetres or 160 inches of annual rainfall, while the southeast receives between 2,000 and 3,000 millimetres (80 and 120 in). The southern region of Nigeria experiences a double rainfall maxima with two high peaks. The first rainy season starts in March, ending in June. The August break, a short dry season, follows, followed by a short rainy season in September and a long dry season in October.

    The tropical savanna climate, characterized by distinct rainy and dry seasons, dominates western to central Nigeria. It has a single peak in the summer and consistently high temperatures above 18 °C or 64.4 °F. Abuja, Nigeria's capital, experiences a temperature range of 18.45 to 36.9 °C (65.2 to 98.4 °F). The dry season occurs from December to March and is hot and dry with the Harmattan wind, a continental tropical (CT) air mass laden with dust from the Sahara, prevailing throughout this period.

    With the Intertropical Convergence Zone swinging northward over West Africa from the Southern Hemisphere in April, heavy showers coming from pre-monsoonal convective clouds mainly in the form of squall lines also known as the north easterlies formed mainly as a result of the interactions of the two dominant airmasses in Nigeria known as the maritime tropical (south westerlies) and the continental tropical (north easterlies), begins in central Nigeria while monsoons arrive in July, bringing with it high humidity, heavy cloud cover and heavy rainfall lasting until September when the monsoons gradually begin retreating southward to the southern part of Nigeria. Rainfall totals in central Nigeria varies from 1,100 mm (43.3 in) in the lowlands to over 2,000 mm (78.7 in) along the south western …

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    Nigeria's most expansive topographical region is that of the Niger and Benue River valleys, which merge into each other and form a "y" shaped confluence at Lokoja. Plains rise to the north of the valleys. To the southwest of the Niger there is "rugged" highland, and to the southeast of the Benue hills and mountains are found all the way to the border with Cameroon. Coastal plains are found in both the southwest and the southeast.
    The Niger Delta is located in the southern part of Nigeria. It is one of the world's largest arcuate fan-shaped river deltas. The riverine area of the Niger Delta is a coastal belt of swamps bordering the Atlantic. The mangrove swamps are vegetated tidal flats formed by a reticulate pattern of interconnected meandering creeks and tributaries of the Niger River. About 70% of Nigeria's crude oil and gas production is from the area. A recent global remote sensing analysis suggested that there were 1,244 km (480 sq mi) of tidal flats in Nigeria, making it the 27th ranked country in terms of tidal flat area.

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    Nigeria is covered by three types of vegetation: forests (where there is significant tree cover), savannahs (insignificant tree cover, with grasses and flowers located between trees), and montane land (least common and mainly found in the mountains near the Cameroon border). Both the forest zone and the savannah zone are divided into three parts.

    Some of the forest zone's most southerly portion, especially around the Niger River and Cross River deltas, is mangrove swamp. North of this is fresh water swamp, containing different vegetation from the salt water mangrove swamps, and north of that is rain forest.

    The savannah zone's three categories are divided into Guinean forest-savanna mosaic, made up of plains of tall grass which are interrupted by trees, the most common across the country; Sudan savannah, with short grasses and short trees; and Sahel savannah patches of grass and sand, found in the northeast.
    Nigeria has numerous tree species, of which the majority of them are native while few are exotic. A high percentage of man-made forests in the country is dominated by exotic species. This culminated from the assumption that exotic trees are fast-growing. However, studies have also investigated the growth of indigenous trees in with that of exotic species. Due to overexploitation, the remaining natural ecosystems and primary forests in Nigeria are restricted to the protected areas which include one biosphere reserve, seven national parks, one World Heritage site, 12 Strict Nature Reserves (SNRs), 32 game reserves/wildlife sanctuaries, and hundreds of forest reserves. These are in addition to several ex-situ conservation sites such as arboreta, botanical gardens, zoological gardens, and gene banks managed by several tertiary and research institutions

    Many countries in Africa are affected by Invasive Alien Species (IAS). In 2004, the IUCN–World Conservation Union identified 81 IAS in South Africa, 49 in Mauritius, 37 in Algeria and Madagascar, 35 in Kenya, 28 in Egypt, 26 in Ghana and Zimbabwe, and 22 in Ethiopia. However, very little is known about IAS in Nigeria, with most technical reports and literature reporting fewer than 10 invasive plants in the country. Aside from plant invaders, Rattus rattus and Avian influenza virus were also considered IAS in Nigeria. The initial entry of IAS into Nigeria was mainly through exotic plant introductions by the colonial rulers either for forest tree plantations or for ornamental purposes. The entry of exotic plants into Nigeria during the post-independence era was encouraged by increasing economic activity, the commencement of commercial oil explorations, the introduction through ships, and the introduction of ornamental plants by commercial floriculturists.

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