Misplaced Pages

#211788

79-477: This valley extends southward from Western Asia into the eastern part of Africa, where several deep, elongated lakes, called ribbon lakes , exist on the rift valley floor, Lake Malawi and Lake Tanganyika being two such examples. The region has a unique ecosystem and contains a number of Africa's wildlife parks. The term Great Rift Valley is most often used to refer to the valley of the East African Rift ,

158-511: A few thousand meters high, and can close down airports for short periods of time. These winds can last for a full day at the beginning and end of the season, and for several days during the middle of the season. The shamal is a summer northwesterly wind blowing over Iraq and the Persian Gulf states (including Saudi Arabia and Kuwait), often strong during the day, but decreasing at night. This weather effect occurs anywhere from once to several times

237-527: A genus level, six species of Chrysichthys catfish are only found in the Tanganyika basin where they live both in shallow and relatively deep waters; in the latter habitat they are the primary predators and scavengers. A unique evolutionary radiation in the lake is the 15 species of Mastacembelus spiny eels, all but one endemic to its basin. Although other African Great Lakes have Synodontis catfish, endemic catfish genera and Mastacembelus spiny eels,

316-496: A greater role than the rivers. At least 90% of the water influx is from rain falling on the lake's surface and at least 90% of the water loss is from direct evaporation. The major river flowing into the lake is the Ruzizi River , formed about 10,000 years ago, which enters the north of the lake from Lake Kivu . The Malagarasi River , which is Tanzania's second largest river, enters the east side of Lake Tanganyika. The Malagarasi

395-571: A precious biological resource for the study of speciation and evolution . The cichlids of the African Great Lakes , including Tanganyika, represent the most diverse extent of adaptive radiation in vertebrates. Some of the endemic species do occur slightly into the upper Lukuga River (Lake Tanganyika's outflow), but any further distribution into the Congo River basin is stemmed purely by geography and chemistry—Tanganyika's lake environment

474-604: A year. West Asia contains large areas of mountainous terrain. The Anatolian Plateau is sandwiched between the Pontus Mountains and Taurus Mountains in Turkey . Mount Ararat in Turkey rises to 5,137 m (16,854 ft). The Zagros Mountains are located in Iran, in areas along its border with Iraq. The Central Plateau of Iran is divided into two drainage basins . The northern basin

553-522: Is Dasht-e Kavir (Great Salt Desert), and Dasht-e-Lut is the southern basin. In Yemen , elevations exceed 3,700 m (12,100 ft) in many areas, and highland areas extend north along the Red Sea coast and north into Lebanon . A fault zone also exists along the Red Sea, with continental rifting creating trough -like topography with areas located well below sea level . The Dead Sea , located on

632-631: Is a geographical term with more consistency. It excludes most of Egypt and the northwestern part of Turkey , and includes the southern part of the Caucasus . West Asia covers an area of 5,994,935 km (2,314,657 sq mi), with a population of about 313 million. Of the 20 UN member countries fully or partly within the region, 13 are part of the Arab world . The most populous countries in West Asia are Iran , Turkey , Iraq , Saudi Arabia and Yemen . In

711-667: Is an African Great Lake . It is the second-largest freshwater lake by volume and the second deepest , in both cases after Lake Baikal in Siberia . It is the world's longest freshwater lake. The lake is shared among four countries— Tanzania , the Democratic Republic of the Congo (the DRC), Burundi , and Zambia —with Tanzania (46%) and the DRC (40%) possessing the majority of the lake. It drains into

790-424: Is deeper than any other cichlid known. Some of the deepwater genera (e.g., Bathybates , Gnathochromis , Hemibates and Xenochromis ) have been caught in places virtually devoid of oxygen, and how they are able to survive there is unclear. Tanganyika cichlids are generally benthic (found at or near the bottom) and/or coastally. No Tanganyika cichlids are truly pelagic and offshore, except for some of

869-482: Is far more stable and consistent than the rapids and fast-flowing sections of the Congo River. Additionally, Lake Tanganyika's water is alkaline and of a higher pH (which the cichlids prefer), containing a higher calcium and mineral content than the Congo's acidic , sediment -rich waters, which collect much organic detritus from the surrounding rainforests . In areas of the Congo away from rapids or whitewater ,

SECTION 10

#1732837266212

948-461: Is home to more than 80 species of non-cichlid fish and about 60% of these are endemic. The open waters of the pelagic zone are dominated by four non-cichlid species: Two species of "Tanganyika sardine" ( Limnothrissa miodon and Stolothrissa tanganicae ) form the largest biomass of fish in this zone, and they are important prey for the forktail lates ( Lates microlepis ) and sleek lates ( L. stappersii ). Two additional lates are found in

1027-816: Is occupied by the Wadi Arabah , then the Gulf of Aqaba , and then the Red Sea . Off the southern tip of Sinai in the Red Sea, the Dead Sea Transform meets the Red Sea Rift which runs the length of the Red Sea. The Red Sea Rift comes ashore to meet the East African Rift and the Aden Ridge in the Afar Depression of East Africa. The junction of these three rifts is called the Afar triple junction . The East African Rift follows

1106-471: Is older than Lake Tanganyika, and before the lake was formed, it probably was a headwater of the Lualaba River , the main Congo River headstream. The lake has a complex history of changing flow patterns, due to its high altitude, great depth, slow rate of refill, and mountainous location in a turbulently volcanic area that has undergone climate changes. Apparently, it has rarely in the past had an outflow to

1185-497: Is typically at depths around 100 m (330 ft) in the northern part of the lake and 240–250 m (790–820 ft) in the south. The oxygen-devoid deepest sections contain high levels of toxic hydrogen sulphide and are essentially lifeless, except for bacteria . Lake Tanganyika and its associated wetlands are home to Nile crocodiles (including famous giant Gustave ), Zambian hinged terrapins , serrated hinged terrapins , and pan hinged terrapins (last species not in

1264-482: Is unclear if they have a similar behavior. The facultative brood parasites often lay their eggs synchronously with mouthbroding cichlids. The cichlid pick up the eggs in their mouth as if they were their own. Once the catfish eggs hatch the young eat the cichlid eggs. Six catfish genera are entirely restricted to the lake basin: Bathybagrus , Dinotopterus , Lophiobagrus , Phyllonemus , Pseudotanganikallabes and Tanganikallabes . Although not endemic on

1343-978: The Anti-Lebanon Mountains . Further south it is known as the Hula Valley separating the Galilee mountains and the Golan Heights . The Jordan River begins here and flows southward through Lake Hula into the Sea of Galilee in Israel . The Rift then continues south through the Jordan Rift Valley into the Dead Sea on the Israeli - Jordanian border. From the Dead Sea southwards, the Rift

1422-463: The Arabian Peninsula numbering more than 3 million. Christian communities have played a vital role in West Asia. Judaism is the predominant religion in Israel , and there are small ancient Jewish communities in West Asia such as in Turkey (14,300), Azerbaijan (9,100), and Iran (8,756). The Druze Faith or Druzism originated in West Asia. It is a monotheistic religion based on

1501-822: The Armenian highlands , the Levant , the island of Cyprus , the Sinai Peninsula and the South Caucasus . The region is separated from Africa by the Isthmus of Suez in Egypt , and separated from Europe by the waterways of the Turkish Straits and the watershed of the Greater Caucasus . Central Asia lies to its northeast, while South Asia lies to its east. Twelve seas surround

1580-453: The Baháʼí Faith , Yarsanism , Yazidism , Zoroastrianism , Mandaeism , and Shabakism . The economy of West Asia is diverse and the region experiences high economic growth. Turkey has the largest economy in the region, followed by Saudi Arabia and Iran. Petroleum is the major industry in the regional economy, as more than half of the world's oil reserves and around 40 percent of

1659-563: The Congo River system and ultimately into the Atlantic Ocean . Lake Tanganyika is situated within the Albertine Rift , the western branch of the East African Rift , and is confined by the mountainous walls of the valley. It is the largest rift lake in Africa and the second-largest lake by volume in the world. It is the deepest lake in Africa and holds the greatest volume of fresh water on

SECTION 20

#1732837266212

1738-574: The Eastern Rift Valley . The Western Rift, also called the Albertine Rift , is bordered by some of the highest mountains in Africa, including the Virunga Mountains , Mitumba Mountains , and Ruwenzori Range . It contains the Rift Valley lakes , which include some of the deepest lakes in the world (up to 1,470 metres (4,820 ft) deep at Lake Tanganyika ). Much of this area lies within

1817-446: The Gulf of Oman . The population of West Asia was estimated at 272 million as of 2008, projected to reach 370 million by 2030 by Maddison (2007; the estimate excludes the Caucasus and Cyprus). This corresponds to an annual growth rate of 1.4% (or a doubling time of 50 years), well above the world average of 0.9% (doubling time 75 years). The population of West Asia is estimated at 4% of world population , up from about 39 million at

1896-716: The Jordan River , the Dead Sea and the Arabah Valley), Red Sea Rift and the East African Rift . These rifts and faults were formed 35 million years ago. The northernmost part of the Rift corresponds to the central section of what is called today the Dead Sea Transform (DST) or Rift. This midsection of the DST forms the Beqaa Valley in Lebanon, separating the Mount Lebanon range from

1975-645: The Shire River , which flows from the lake into the Zambezi River. The rift continues south of the Zambezi as the Urema Valley of central Mozambique. Western Asia West Asia , also called Western Asia or Southwest Asia , is the westernmost region of Asia . As defined by most academics, UN bodies and other institutions, the subregion consists of Anatolia , the Arabian Peninsula , Iran , Mesopotamia ,

2054-544: The Tigris and Euphrates rivers contribute very well. West Asia is primarily arid and semi-arid , and can be subject to drought , but it also contains vast expanses of forest and fertile valleys. The region consists of grasslands , rangelands , deserts , and mountains . Water shortages are a problem in many parts of West Asia, with rapidly growing populations increasing demands for water, while salinization and pollution threaten water supplies. Major rivers, including

2133-574: The Tigris and Euphrates , provide sources for irrigation water to support agriculture . There are two wind phenomena in West Asia: the sharqi and the shamal . The sharqi (or sharki ) is a wind that comes from the south and southeast. It is seasonal, lasting from April to early June, and comes again between late September and November. The winds are dry and dusty, with occasional gusts up to 80 kilometres per hour (50 miles per hour) and often kick up violent sand and dust storms that can carry sand

2212-655: The World Geographical Scheme for Recording Plant Distributions (WGSRPD), West Asia excludes the Arabian Peninsula and includes Afghanistan . The Food and Agriculture Organization (FAO) excludes Egypt and includes Afghanistan. The United Nations Environment Programme excludes Cyprus , Israel , Turkey , and Iran from West Asia. The term West Asia is used pragmatically and has no "correct" or generally accepted definition. Its typical definitions overlap substantially, but not entirely, with definitions of

2291-615: The divergent plate boundary which extends from the Afar triple junction southward through eastern Africa , and is in the process of splitting the African plate into two new and separate plates. Geologists generally refer to these evolving plates as the Nubian plate and the Somali plate . Today these rifts and faults are seen as distinct, although connected, but originally, the Great Rift Valley

2370-422: The mantle cavity of the unionid mussel Pleiodon spekei , making it one of only two known commensal species of freshwater shrimp (the other is the sponge-living Caridina spongicola from Lake Towuti , Indonesia). Among Rift Valley lakes , Lake Tanganyika far surpasses all others in terms of crustacean and freshwater snail richness (both in total number of species and number of endemics). For example,

2449-713: The piscivorous Bathybates . Two of these, B. fasciatus and B. leo , mainly feed on Tanganyika sardines . Tanganyika cichlids differ extensively in ecology , and include species that are herbivores , detritivores , planktivores , insectivores , molluscivores , scavengers , scale-eaters and piscivores. These dietary specializations, however, have been shown to be variable and subject to opportunistic changes. That is, many species of Tanganyikan cichlid with specialized diets showed opportunistic, episodic exploitation of Stolothrissa tanganicae and Limnothrissa miodon when prey concentrations were unusually high. The fishes' breeding behavior falls into two main groups:

Great Rift Valley - Misplaced Pages Continue

2528-637: The Niemba River, to maintain a flow. The lake may also have at times had different inflows and outflows; inward flows from a higher Lake Rukwa , access to Lake Malawi and an exit route to the Nile have all been proposed to have existed at some point in the lake's history. Lake Tanganyika is an ancient lake , one of only twenty more than a million years old. Its three basins, which in periods with much lower water levels were separate lakes, are of different ages. The central began to form 9–12 million years ago (Mya),

2607-653: The Red Sea to the end before turning inland into the Ethiopian highlands , dividing the country into two large and adjacent but separate mountainous regions. In Kenya, Uganda, and the fringes of South Sudan, the Great Rift runs along two separate branches that are joined to each other only at their southern end, in Southern Tanzania along its border with Zambia . The two branches are called the Western Rift Valley and

2686-508: The Tanganyika thalassoids, which are part of Prosobranchia , are endemic to the lake. Initially they were believed to be related to similar marine snails, but they are now known to be unrelated. Their appearance is now believed to be the result of the highly diverse habitats in Lake Tanganyika and evolutionary pressure from snail-eating fish and, in particular, Platythelphusa crabs. A total of 17 freshwater snail genera are endemic to

2765-552: The accumulated sediment and organic matter creates sections of " blackwater ", with a high concentration of tannins from dissolving wood and leaves, creating an environment in which cichlids simply do not thrive. Likewise, many tropical riverine species would likely suffer if exposed to the crisp, alkaline lake water. Although Lake Tanganyika has fewer cichlid species than Lakes Malawi or Victoria —which both have experienced relatively recent explosive species radiations (resulting in many closely related species)—, its cichlids are

2844-436: The area were fishing. Most of them included using a lantern as a lure for fish that are attracted to light. There were three basic forms. One called Lusenga which is a wide net used by one person from a canoe. The second one is using a lift net. This was done by dropping a net deep below the boat using two parallel canoes and then simultaneously pulling it up. The third is called Chiromila which consisted of three canoes. One canoe

2923-471: The beginning of the 20th century, or about 2% of world population at the time. The most populous countries in the region are Turkey and Iran , each with around 79 million people, followed by Iraq and Saudi Arabia with around 33 million people each, and Yemen with around 29 million people. Numerically, West Asia is predominantly Arab , Persian , Turkish , and the dominating languages are correspondingly Arabic , Persian and Turkish , each with of

3002-662: The border between the West Bank , Israel , and Jordan , is situated at 418 m (1,371 ft) below sea level, making it the lowest point on the surface of the Earth . Rub' al Khali , one of the world's largest sand deserts, spans the southern third of the Arabian Peninsula in Saudi Arabia, parts of Oman, the United Arab Emirates and Yemen. Jebel al Akhdar is a small range of mountains located in northeastern Oman, bordering

3081-496: The boundaries of national parks such as Virunga National Park in the Democratic Republic of Congo , Rwenzori National Park and Queen Elizabeth National Park in Uganda, and Volcanoes National Park in Rwanda . Lake Victoria is considered to be part of the rift valley system although it actually lies between the two branches. All of the African Great Lakes were formed as the result of

3160-839: The boundary between the Aegean and Anatolian plate in eastern Turkey is also seismically active. Several major aquifers provide water to large portions of West Asia. In Saudi Arabia, two large aquifers of Palaeozoic and Triassic origins are located beneath the Jabal Tuwayq mountains and areas west to the Red Sea. Cretaceous and Eocene -origin aquifers are located beneath large portions of central and eastern Saudi Arabia, including Wasia and Biyadh which contain amounts of both fresh water and saline water . Flood or furrow irrigation, as well as sprinkler methods, are extensively used for irrigation , covering nearly 90,000 km (35,000 sq mi) across West Asia for agriculture. Also,

3239-402: The continent, accounting for 16% of the world's available fresh water. It extends for 676 km (420 mi) in a general north–south direction and averages 50 km (31 mi) in width. The lake covers 32,900 km (12,700 sq mi), with a shoreline of 1,828 km (1,136 mi), a mean depth of 570 m (1,870 ft) and a maximum depth of 1,470 m (4,820 ft) (in

Great Rift Valley - Misplaced Pages Continue

3318-488: The dominant language in Israel in the second half of the 20th century, and Neo-Aramaic (spoken by modern Arameans , Assyrians , and Chaldeans ) and Greek both remain present in their respective territories as minority languages. Significant native minorities include, in alphabetical order: Arameans , Assyrians , Chaldeans , Druze , Jews , Lurs , Mandeans , Maronites , Shabaks and Yezidis . Religion in West Asia (2020) Four major religious groups (i.e.

3397-509: The fish populations, causing significant declines. In 2016, it was estimated that the total catch was up to 200,000 tonnes. It is thought that early Homo sapiens were making an impact on the region during the Stone Age . The time period of the Middle Stone Age to Late Stone Age is described as an age of advanced hunter-gatherers. There are many methods in which the native people of

3476-504: The freshwater springs supplying Lake Naivasha are essential to support its current biological variety. The southern section of the Rift Valley includes Lake Malawi , the third-deepest freshwater body in the world, which reaches 706 metres (2,316 ft) in depth and separates the Nyassa plateau of Northern Mozambique from Malawi. The rift extends southwards from Lake Malawi as the valley of

3555-482: The genera Altolamprologus , Cyprichromis , Eretmodus , Julidochromis , Lamprologus , Neolamprologus , Tropheus and Xenotilapia , are popular aquarium fish due to their bright colors and patterns, and interesting behaviors. Recreating a Lake Tanganyika biotope to host those cichlids in a habitat similar to their natural environment is also popular in the aquarium hobby, with many species today being bred in captivity successfully. Lake Tanganyika

3634-608: The lake ( Haplochromini , Tilapiini and Tylochromini ). Others have proposed splitting the Tanganyika cichlids into as many as 12–16 tribes ( Bathybatini , Benthochromini , Boulengerochromini , Cyphotilapiini , Eretmodini , Greenwoodochromini , Perissodini and Trematocarini , in addition to the aforementioned tribes). Most Tanganyika cichlids live along the shoreline, down to a depth of 100 m (330 ft), but some deep-water species regularly descend to 200 m (660 ft). Trematocara species have, exceptionally, been found at more than 300 m (980 ft), which

3713-455: The lake itself, but in adjacent lagoons). Storm's water cobra , a threatened subspecies of banded water cobra that feeds mainly on fish, is only found in Lake Tanganyika, where it prefers rocky shores. Lake Tanganyika is home to at least 250 endemic species of cichlids , and undescribed species likely remain to be discovered. Almost all (roughly 98%) of the lake's cichlid species are found solely there, and nowhere else, thus making it

3792-567: The lake, and as a base from which to launch surprise attacks on Allied troops. It therefore became essential for the Allied forces to gain control of the lake themselves. Under the command of Lieutenant Commander Geoffrey Spicer-Simson the British Royal Navy achieved the monumental task of bringing two armed motor boats HMS Mimi and HMS Toutou from England to the lake by rail, road and river to Albertville (since renamed Kalemie in 1971) on

3871-936: The lake, such as Hirthia , Lavigeria , Paramelania , Reymondia , Spekia , Stanleya , Tanganyicia and Tiphobia . There are about 30 species of non-thalassoid snails in the lake, but only five of these are endemic, including Ferrissia tanganyicensis and Neothauma tanganyicense . The latter is the largest Tanganyika snail and its shell is often used by small shell-dwelling cichlids . Crustaceans are also highly diverse in Tanganyika with more than 200 species, of which more than half are endemic. They include 10 species of freshwater crabs (9 Platythelphusa and Potamonautes platynotus ; all endemic), at least 11 species of small atyid shrimp ( Atyella , Caridella and Limnocaridina ), an endemic palaemonid shrimp ( Macrobrachium moorei ), about 100 ostracods , including many endemics, and several copepods . Among these, Limnocaridina iridinae lives inside

3950-636: The lake, the Tanganyika lates ( L. angustifrons ) and bigeye lates ( L. mariae ), but both these are primarily benthic hunters, although they also may move into open waters. The four lates, all endemic to Tanganyika, have been overfished and larger individuals are rare today. Among the more unusual fish in the lake are the endemic, facultatively brood parasitic "cuckoo catfish", including at least Synodontis grandiops and S. multipunctatus . A number of others are very similar (e.g., S. lucipinnis and S. petricola ) and have often been confused; it

4029-412: The lake. Among the endemic bivalves are three monotypic genera: Grandidieria burtoni , Pseudospatha tanganyicensis and Brazzaea anceyi . Many of the snails are unusual for species living in freshwater in having noticeably thickened shells and/or distinct sculpture , features more commonly seen in marine snails. They are referred to as thalassoids, which can be translated to "marine-like". All

SECTION 50

#1732837266212

4108-607: The lake. He noted the name "Liemba" for its southern part, a word probably from the Fipa language . Tanganyika means "stars" in the Luvale language . The lake was the scene of Battle for Lake Tanganyika during World War I . With the aid of the Graf Goetzen , the Germans had complete control of the lake in the early stages of the war. The ship was used both to ferry cargo and personnel across

4187-412: The latter), Saudi Arabia, Syria, Turkey, UAE, and Yemen as West Asian countries. By contrast, the United Nations Industrial Development Organization (UNIDO) in its 2015 yearbook includes Armenia and Azerbaijan, and excludes Israel (as Other) and Turkey (as Europe). Unlike the UNIDO, the United Nations Statistics Division (UNSD) excludes Iran from West Asia and includes Turkey, Georgia, and Cyprus in

4266-505: The most morphologically and genetically diverse. This is linked to the maturity of Tanganyika, as it is far older than the other lakes. Tanganyika has the largest number of endemic cichlid genera of all African lakes. All Tanganyika cichlids are in the subfamily Pseudocrenilabrinae . Of the 10 tribes in this subfamily, half are largely or entirely restricted to the lake ( Cyprichromini , Ectodini , Lamprologini , Limnochromini and Tropheini ), while another three have species in

4345-460: The northern 7–8 Mya and the southern 2–4 Mya. The lake's water is alkaline with a pH around 9 at depths of 0–100 m (0–330 ft). Below this, it is around 8.7, gradually decreasing to 8.3–8.5 in the deepest parts of Tanganyika. A similar pattern can be seen in the electric conductivity , ranging from about 670 μS/cm in the upper part to 690 μS/cm in the deepest. Surface temperatures generally range from about 24 °C (75 °F) in

4424-443: The northern basin). It holds an estimated 18,750 km (4,500 cu mi). The catchment area of the lake is 231,000 km (89,000 sq mi). Two main rivers flow into the lake, as well as numerous smaller rivers and streams (whose lengths are limited by the steep mountains around the lake). The one major outflow is the Lukuga River , which empties into the Congo River drainage. Precipitation and evaporation play

4503-456: The northwest and north, the region is delimited from Europe by the Turkish Straits and drainage divide of the Greater Caucasus , to the southwest, it is delimited from Africa by the Isthmus of Suez , while to the northeast and east, the region adjoins Central Asia and South Asia . The region is located east of Southern Europe and south of Eastern Europe . The Dasht-e Kavir and Dasht-e Lut deserts in eastern Iran naturally delimit

4582-418: The only other Rift Valley lake with endemic freshwater crabs are Lake Kivu and Lake Victoria with two species each. The diversity of other invertebrate groups in Lake Tanganyika is often not well-known, but there are at least 20 described species of leeches (12 endemics), 9 sponges (7 endemic), 6 bryozoa (2 endemic), 11 flatworms (7 endemic), 20 nematodes (7 endemic), 28 annelids (17 endemic) and

4661-414: The order of 70 million speakers, followed by smaller communities of Kurdish , Azerbaijani , Hebrew , Armenian and Neo-Aramaic . The dominance of Arabic and Turkish is the result of the medieval Arab and Turkic invasions beginning with the Islamic conquests of the 7th century AD, which displaced the formerly dominant Aramaic in the region of Syria , and Greek in Anatolia, although Hebrew became

4740-453: The part of Asia known in classical antiquity, as opposed to the reaches of "interior Asia", i.e. Scythia , and "Eastern Asia" the easternmost reaches of geographical knowledge in classical authors, i.e. Transoxania and India . In the 20th century, "Western Asia" was used to denote a rough geographical era in the fields of archaeology and ancient history , especially as a shorthand for "the Fertile Crescent excluding Ancient Egypt " for

4819-413: The purposes of comparing the early civilizations of Egypt and the former. Use of the term in the context of contemporary geopolitics or world economy appears to date from at least the mid-1960s. The region is surrounded by eight major seas; the Aegean Sea , the Black Sea , the Caspian Sea , the Persian Gulf , the Arabian Sea , the Gulf of Aden , the Red Sea , and the Mediterranean Sea . To

SECTION 60

#1732837266212

4898-461: The region (clockwise): the Aegean Sea , the Sea of Marmara , the Black Sea , the Caspian Sea , the Persian Gulf , the Gulf of Oman , the Arabian Sea , the Gulf of Aden , the Red Sea , the Gulf of Aqaba , the Gulf of Suez , and the Mediterranean Sea . West Asia contains the majority of the similarly defined Middle East . The Middle East is a political term that has changed many times depending on political and historical context while West Asia

4977-415: The region from Balochistan and South Asia. Three major tectonic plates converge on West Asia, including the African , Eurasian , and Arabian plates. The boundaries between the tectonic plates make up the Azores-Gibraltar Ridge , extending across North Africa , the Red Sea , and into Iran. The Arabian Plate is moving northward into the Anatolian plate (Turkey) at the East Anatolian Fault , and

5056-422: The region's sports organisations are the West Asia Basketball Association , West Asian Billiards and Snooker Federation , West Asian Football Federation , and the West Asian Tennis Federation . "Western Asia" was in use as a geographical term in the early 19th century, before " Near East " became current as a geopolitical concept. In the context of the history of classical antiquity , "Western Asia" could mean

5135-663: The region. In the United Nations geopolitical Eastern European Group , Armenia and Georgia are included in Eastern Europe, whereas Cyprus and East Thracian Turkey are in Southern Europe. These three nations are listed in the European category of the United Nations Educational, Scientific, and Cultural Organisation (UNESCO). National members of West Asian sports governing bodies are limited to Bahrain, Iran, Iraq, Jordan, Kuwait, Lebanon, Syria, Oman, Palestine, Qatar, Saudi Arabia, United Arab Emirates, and Yemen. The Olympic Council of Asia 's multi-sport event West Asian Games are contested by athletes representing these 13 countries. Among

5214-553: The relatively high diversity is unique to Tanganyika, which likely is related to its old age. Among the non-endemic fish, some are widespread African species but several are only shared with the Malagarasi and Congo River basins, such as the Congo bichir ( Polypterus congicus ), goliath tigerfish ( Hydrocynus goliath ), Citharinus citharus , six-banded distichodus ( Distichodus sexfasciatus ) and mbu puffer ( Tetraodon mbu ). A total of 83 freshwater snail species (65 endemic) and 11 bivalve species (8 endemic) are known from

5293-460: The rift, and most lie in territories within the rift. In Kenya , the valley is deepest to the north of Nairobi . As the lakes in the Eastern Rift have no outlet to the sea and tend to be shallow, they have a high mineral content as the evaporation of water leaves the salts behind. For example, Lake Magadi has high concentrations of soda ( sodium carbonate ) and Lake Elmenteita , Lake Bogoria , and Lake Nakuru are all strongly alkaline , while

5372-409: The sea. It has been described as "practically endorheic " for this reason. The lake's connection to the sea is dependent on a high water level allowing water to overflow out of the lake through the Lukuga River into the Congo. When not overflowing, the lake's exit into the Lukuga River typically is blocked by sand bars and masses of weed, and instead this river depends on its own tributaries, especially

5451-413: The small hydrozoan jellyfish Limnocnida tanganyicae . Lake Tanganyika supports a major fishery, which, depending on source, provides 25–40% or c. 60% of the animal protein in the diet of the people living in the region. Lake Tanganyika fish can be found exported throughout East Africa. Major commercial fishing began in the mid-1950s and has, together with global warming, had a heavy impact on

5530-402: The south and is wind-driven, but to a lesser extent, up- and downwellings also occur elsewhere in the lake. As a consequence of the stratification, the deep sections contain " fossil water ". This also means it has no oxygen (it is anoxic ) in the deeper parts, essentially limiting fish and other aerobic organisms to the upper part. Some geographical variations are seen in this limit, but it

5609-525: The southern part of the lake in early August to 28–29 °C (82–84 °F) in the late rainy season in March—April. At depths greater than 400 m (1,300 ft), the temperature is very stable at 23.1–23.4 °C (73.6–74.1 °F). The water has gradually warmed since the 19th century and this has accelerated with global warming since the 1950s. The lake is stratified and seasonal mixing generally does not extend beyond depths of 150 m (490 ft). The mixing mainly occurs as upwellings in

5688-459: The substrate- or sand-spawners (often in caves or rock crevices) and the mouthbrooders . Among the endemic species are two of the world's smallest cichlids, Neolamprologus multifasciatus and N. similis (both shell dwellers ), measuring up to 4–5 cm (1.6–2.0 in), and one of the largest, the giant cichlid ( Boulengerochromis microlepis ) at up to 90 cm (3.0 ft). Many cichlids from Lake Tanganyika, such as species from

5767-513: The teachings of figures like Hamza ibn-'Ali ibn-Ahmad and Al-Hakim bi-Amr Allah and Greek philosophers such as Plato and Aristotle . The number of Druze people worldwide is around one million, with about 45% to 50% living in Syria , 35% to 40% living in Lebanon , and less than 10% living in Israel ; recently there has been a growing Druze diaspora. There are also important minority religions like

5846-490: The terms Middle East , Eastern Mediterranean , and Near East (which is historically familiar but widely deprecated today). The National Geographic Style Manual as well as Maddison 's The World Economy: Historical Statistics (2003) by the Organisation for Economic Co-operation and Development (OECD) include only Bahrain, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Qatar, Palestine (called West Bank and Gaza in

5925-928: The two largest religions in the world: Christianity and Islam , plus Judaism and Druze faith ) originated in West Asia. Islam is the largest religion in West Asia, but other faiths that originated there, such as Judaism and Christianity , are also well represented. In Armenia and Georgia , Oriental Orthodoxy and Eastern Orthodoxy respectively are the predominant religions, and there are still different ancient communities of Eastern Christians in Azerbaijan . There are still large ancient communities of Eastern Christians (such as Assyrians , Middle Eastern Christians and Arab Christians ) in Lebanon , Iraq , Iran , Turkey , Syria , Jordan , Israel and Palestine numbering more than 3 million in West Asia. There are also large populations of expatriate workers which include sizeable Christian communities living in

6004-577: The western shore of Lake Tanganyika. The two boats waited until December 1915, and mounted a surprise attack on the Germans, with the capture of the gunboat Kingani . Another German vessel, the Hedwig , was sunk in February 1916, leaving the Götzen as the only German vessel remaining to control the lake. In order to avoid his prize ship falling into Allied hands, Zimmer scuttled the vessel on July 26, 1916. The vessel

6083-719: The world's natural gas reserves are located in the region. Notes: Ramallah is the actual location of the government, whereas the proclaimed capital of Palestine is Jerusalem , which is disputed . Jerusalem is the proclaimed capital of Israel and the actual location of the Knesset , Israeli Supreme Court , etc. Due to its disputed status, most embassies are in Tel Aviv . British Overseas Territory Lake Tanganyika Lake Tanganyika ( / ˌ t æ ŋ ɡ ə n ˈ j iː k ə , - ɡ æ n -/ TANG -gən- YEE -kə, -⁠gan- ; Kirundi : Ikiyaga ca Tanganyika )

6162-526: Was stationary with a lantern while another canoe holds one end of the net and the other circles the stationary one to meet up with the net. The first known Westerners to find the lake were the British explorers Richard Burton and John Speke , in 1858. They located it while searching for the source of the Nile River . Speke continued and found the actual source, Lake Victoria . Later David Livingstone passed by

6241-504: Was thought to be a single feature that extended from Lebanon in the north to Mozambique in the south, where it constitutes one of two distinct physiographic provinces of the East African mountains . It included what today is called the Lebanese section of the Dead Sea Transform (Turkey to Straits of Tiran ), the Jordan Rift Valley (geographic term for section including entire course of

#211788