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Hoggar Mountains
The Hoggar Mountains ( ar, جبال هقار, Berber: ''idurar n Ahaggar'') are a highland region in the central Sahara in southern Algeria, along the Tropic of Cancer. The mountains cover an area of approximately 550,000 km. Geography This mountainous region is located about south of the capital, Algiers. The area is largely rocky desert with an average elevation of more than above sea level. The highest peak, Mount Tahat, is at . The mountains are primarily composed of metamorphic rock approximately 2 billion years old, although there are areas where more recent volcanic activity has laid down much newer rock. Several of the more dramatic peaks, such as Ilamen, are the result of erosion wearing away extinct volcano domes, leaving behind the more resistant material that plugged the volcanic cores. Assekrem is a famous and often visited point where Charles de Foucauld built a hermitage in 1911. The main city near the Hoggar Mountains is Tamanrasset, built in a desert val ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tamanrasset Province
Tamanrasset or Tamanghasset ( ar, ولاية تمنراست ''Wilāya Tamanrāssat'', Berber languages) is the largest province (''wilaya'') in Algeria. It was named after its province seat, Tamanrasset. The province has two national parks, more than any other in Algeria. They are Tassili n'Ajjer National Park and Ahaggar National Park. The province is the largest in Algeria as it is 557,906 km² large. Geography It is located in the deep southern region of Algeria and is 2000 km south of Algiers (capital of Algeria). On the north it is bordered by In Salah Province, on the north-east by Illizi Province, on the east by Djanet Province, on the south by In Guezzam Province, and on the west by Adrar Province, the second largest province by area, and Bordj Badji Mokhtar Province. Tamanrasset also has an international border with Niger. The province is the largest Algerian province with area of 336,854 km2 (130,060 sq mi) although it is located in the heart of the de ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Wadi
Wadi ( ar, وَادِي, wādī), alternatively ''wād'' ( ar, وَاد), North African Arabic Oued, is the Arabic term traditionally referring to a valley. In some instances, it may refer to a wet (ephemeral) riverbed that contains water only when heavy rain occurs. Etymology The term ' is very widely found in Arabic toponyms. Some Spanish toponyms are derived from Andalusian Arabic where ' was used to mean a permanent river, for example: Guadalcanal from ''wādī al-qanāl'' ( ar, وَادِي الْقَنَال, "river of refreshment stalls"), Guadalajara from ''wādī al-ḥijārah'' ( ar, وَادِي الْحِجَارَة, "river of stones"), or Guadalquivir, from ''al-wādī al-kabīr'' ( ar, اَلْوَادِي الْكَبِير, "the great river"). General morphology and processes Wadis are located on gently sloping, nearly flat parts of deserts; commonly they begin on the distal portions of alluvial fans and extend to inland sabkhas or dry lakes. In basin and r ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
West African Crocodile
The West African crocodile, desert crocodile, or sacred crocodile (''Crocodylus suchus'') is a species of crocodile related to – and often confused with – the larger and more aggressive Nile crocodile (''C. niloticus''). Taxonomy Compared to the Nile crocodile, the West African crocodile is smaller: Adults are typically long, and maximum is perhaps . The species was named by Étienne Geoffroy Saint-Hilaire in 1807, who discovered differences between the skulls of a mummified crocodile and those of Nile crocodile (''C. niloticus''). This new species was, however, for a long time afterwards regarded as a Synonym (taxonomy), synonym of the Nile crocodile. In 2003, a study indicated that ''C. suchus'' was a valid species, and this was confirmed by several other studies in 2011–2015. Despite the long history of confusion, Genetics, genetic testing has revealed that the two are not particularly close. The closest relatives of the Nile crocodile are the ''Crocodylus'' species fr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Atakor Volcanic Field
Atakor volcanic field ("Atakor" in Tuareg means "swollen part, knot at the end of something") is a volcanic field in Algeria. It lies in the Hoggar mountains and consists of a variety of volcanic features such as lava flows and about 450 individual vents which create a spectacular scenery. Atakor is one of several large volcanic fields in this mountain range, which sits atop of a domal uplift and has erupted basalt, trachyte and phonolite. Volcanism in Atakor took place in several different phases, beginning 20 million years ago and continuing into the Holocene. Presently there is fumarolic activity. Geography and geomorphology The field lies in the Hoggar and the terrain approaches elevations of although the volcanics form an only superficial cover. The ground has a desert-like appearance. The scenery of the volcanic field is considered to be spectacular, with the lava domes and volcanic necks rising above the surrounding terrain. The field consists of lava domes, lava flow ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camera Trap
A camera trap is a camera that is automatically triggered by a change in some activity in its vicinity, like presence of an animal or a human being. It is typically equipped with a motion sensor – usually a passive infrared (PIR) sensor or an active infrared (AIR) sensor using an infrared light beam. Camera trapping is a method for capturing wild animals on film when researchers are not present, and has been used in ecological research for decades. In addition to applications in hunting and wildlife viewing, research applications include studies of nest ecology, detection of rare species, estimation of population size and species richness, and research on habitat use and occupation of human-built structures. Camera traps, also known as trail cameras, are used to capture images of wildlife with as little human interference as possible. Since the introduction of commercial infrared-triggered cameras in the early 1990s, their use has increased. With advancements in the qua ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Imperial College London
Imperial College London (legally Imperial College of Science, Technology and Medicine) is a public research university in London, United Kingdom. Its history began with Prince Albert, consort of Queen Victoria, who developed his vision for a cultural area that included the Royal Albert Hall, Victoria & Albert Museum, Natural History Museum and royal colleges. In 1907, Imperial College was established by a royal charter, which unified the Royal College of Science, Royal School of Mines, and City and Guilds of London Institute. In 1988, the Imperial College School of Medicine was formed by merging with St Mary's Hospital Medical School. In 2004, Queen Elizabeth II opened the Imperial College Business School. Imperial focuses exclusively on science, technology, medicine, and business. The main campus is located in South Kensington, and there is an innovation campus in White City. Facilities also include teaching hospitals throughout London, and with Imperial College Healthcare ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northwest African Cheetah
The Northwest African cheetah (''Acinonyx jubatus hecki''), also known as the Saharan cheetah, is a cheetah subspecies native to the Sahara and the Sahel. It is listed as Critically Endangered on the IUCN Red List. In 2008, the population was suspected to number less than 250 mature individuals. The Northwest African cheetah was described by German zoologist Max Hilzheimer in 1913 under the scientific name ''Acinonyx hecki''. Taxonomy ''Felis jubata senegalensis'' was described by Henri Marie Ducrotay de Blainville in 1843 based on a cheetah from Senegal. As this name was preoccupied, it is considered synonymous with ''A. j. hecki''. ''Acinonyx hecki'' was the scientific name proposed by Max Hilzheimer in 1913, based upon a captive cheetah in the Berlin Zoological Garden that also originated in Senegal. Characteristics The Northwest African cheetah is quite different in appearance from the other African cheetahs. Its coat is shorter and nearly white in color, with spots t ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Local Extinction
Local extinction, also known as extirpation, refers to a species (or other taxon) of plant or animal that ceases to exist in a chosen geographic area of study, though it still exists elsewhere. Local extinctions are contrasted with global extinctions. Local extinctions mark a change in the ecology of an area. In recent times, local extinction has sometimes been followed by a replacement of the species taken from other locations; wolf reintroduction is an example of this. The term "local extinction" is highly vernacular. The more proper biological term is ''extirpation''. Discussion Glaciation can lead to local extinction. This was the case during the Pleistocene glaciation event in North America. During this period, most of the native North American species of earthworm were killed in places covered by glaciation. This left them open for colonization by European earthworms brought over in soil from Europe. Species naturally become extirpated from islands over time. The number ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
African Wild Dog
The African wild dog (''Lycaon pictus''), also called the painted dog or Cape hunting dog, is a wild canine which is a native species to sub-Saharan Africa. It is the largest wild canine in Africa, and the only extant member of the genus '' Lycaon'', which is distinguished from ''Canis'' by dentition highly specialised for a hypercarnivorous diet, and by a lack of dewclaws. It is estimated that about 6,600 adults (including 1,400 mature individuals) live in 39 subpopulations that are all threatened by habitat fragmentation, human persecution, and outbreaks of disease. As the largest subpopulation probably comprises fewer than 250 individuals, the African wild dog has been listed as endangered on the IUCN Red List since 1990. The species is a specialised diurnal hunter of antelopes, which it catches by chasing them to exhaustion. Its natural enemies are lions and spotted hyenas: the former will kill the dogs where possible, whilst hyenas are frequent kleptoparasites. Like ot ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of National Parks Of Algeria
This is a list of national parks in Africa. The nature of the parks varies considerably not only between countries but also within some nations - the degree of protection, accessibility and type of environment for which it is intended to deliver protection. Some parks have been cleared of their original human population, others have always been essentially uninhabited, while yet others contain significant population centers. National parks can be found in a large majority of African countries, being most numerous in Gabon, Kenya and Tanzania. Some nations also have considerable areas designated as private parks, game reserves, forest reserves, marine reserves, national reserves and natural parks. These are not included in the list below, even though some of these may resemble some national parks. For more information on such zones, see the individual articles on each country. Algeria *Ahaggar National Park * Belezma National Park * Chrea National Park * Djebel Aissa Nation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ecoregion
An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of land or water, and contain characteristic, geographically distinct assemblages of natural communities and species. The biodiversity of flora, fauna and ecosystems that characterise an ecoregion tends to be distinct from that of other ecoregions. In theory, biodiversity or conservation ecoregions are relatively large areas of land or water where the probability of encountering different species and communities at any given point remains relatively constant, within an acceptable range of variation (largely undefined at this point). Three caveats are appropriate for all bio-geographic mapping approaches. Firstly, no single bio-geographic framework is optimal for all taxa. Ecoregions reflect the best compromise for as many taxa as possible. Se ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
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