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Cyrenaica ( ; ''Kyrēnaïkḗ'', after the city of Cyrene; (アラビア語:برقة) ';) is the eastern coastal region of Libya. Also known as ''Pentapolis'' in antiquity, it formed part of the Creta et Cyrenaica province during the Roman period, later divided into ''Libya Pentapolis'' and ''Libya Sicca''. During the Islamic period, the area came to be known as ''Barqa'', after the city of Barca. Cyrenaica was the name of an administrative division of Italian Libya from 1927 until 1943, then under British military and civil administration from 1943 until 1951, and finally in the Kingdom of Libya from 1951 until 1963. In a wider sense, still in use, Cyrenaica includes all of the eastern part of Libya, including the Kufra District. Cyrenaica borders on Tripolitania in the northwest and on Fezzan in the southwest. The region that used to be Cyrenaica officially until 1963 has formed several shabiyat, the administrative divisions of Libya, since 1995. The 2011 Libyan Civil War started in Cyrenaica, which came largely under the control of the National Transitional Council (headquartered in Benghazi) for most of the war.〔 ("Endgame in Tripoli". ) ''The Economist''. 24 February 2011. Retrieved 1 March 2011. 〕 ==Geography== Geologically, Cyrenaica rests on a mass of Miocene limestone that tilts up steeply from the Mediterranean Sea and falls inland with a gradual descent to sea level again. This mass is divided into two blocks. The Jebel Akhdar extends parallel to the coast from the Gulf of Sidra to the Gulf of Bomba, and reaches an elevation of 872 meters. There is no continuous coastal plain, the longest strip running from the recess of Gulf of Sidra past Benghazi to Tolmeita. Thereafter, except for deltaic patches at Susa and Derna, the shore is all precipitous. A steep escarpment separates the coastal plain from a relatively level plateau, known as the Marj Plain, which lies at about 300 meters elevation. Above the Marj Plain lies a dissected plateau at about 700 meters elevation, which contains the highest peaks in the range.〔Gimingham, C. H., and K. Walton (1954). "Environment and the Structure of Scrub Communities on the Limestone Plateaux of Northern Cyrenaica." ''Journal of Ecology,'' Vol. 42, No. 2, Jul., 1954〕 The Jebel Akhdar and its adjacent coast are part of the Mediterranean woodlands and forests ecoregion, and have a Mediterranean climate of hot, dry summers and relatively mild and rainy winters.〔"Mediterranean woodlands and forests". WWF Scientific Report (). Accessed March 27, 2011〕 The plant communities of this portion of Cyrenaica include forest, woodland, maquis, garrigue, steppe, and oak savanna. Garrigue shrublands occupy the non-agricultural portions coastal plain and coastal escarpments, with ''Sarcopoterium spinosum'', along with ''Asphodelus microcarpus'' and ''Artemisia herba-alba'', as the predominant species.〔〔El-Darier, S. M. and F.M. El-Mogaspi (2009). "Ethnobotany and Relative Importance of Some Endemic Plant Species at El-Jabal El-Akhdar Region (Libya)". ''World Journal of Agricultural Sciences'' 5 (3): 353-360, 2009, pp 353-360.〕 Small areas of maquis are found on north-facing slopes near the sea, becoming more extensive on the lower plateau. ''Juniperus phoenicea, Pistacia lentiscus, Quercus coccifera'' and ''Ceratonia siliqua'' are common tree and large shrub species in the maquis.〔〔 The upper plateau includes areas of garrigue, two maquis communities, one dominated by ''Pistacia lentiscus'' and the other a mixed maquis in which the endemic ''Arbutus pavarii'' is prominent, and forests of ''Cupressus sempervirens, Juniperus phoenicea, Olea europaea, Quercus coccifera, Ceratonia siliqua,'' and ''Pinus halepensis.''〔 Areas of red soil are found on the Marj Plain, which has borne abundant crops of wheat and barley from ancient times to the present day. Plenty of springs issue on the highlands. Wild olive trees are abundant, and large areas of oak savanna provide pasture to the flocks and herds of the local Bedouins.〔"Cyrenaica", from ''Encyclopædia Britannica'' Eleventh Edition, 1911〕 Historically large areas of range were covered in forest. The forested area of the Jebel Akhdar has been shrinking in recent decades. A 1996 report to the UN Food and Agriculture Organization estimated that the forested area was reduced to 320,000 hectares from 500,000 hectares, mostly cleared to grow crops.〔 The Green Mountain Conservation and Development Authority estimates that the forested area decreased from 500,000 hectares in 1976 to 180,000 hectares in 2007.〔''The Report: Libya 2008,'' p. 134. Oxford Business Group.〕 The southward slopes of the Jebel Akhdar are occupied by the Mediterranean dry woodlands and steppe, a transitional ecoregion lying between the Mediterranean climate regions of North Africa and the hyper-arid Sahara Desert.〔"North Saharan steppe and woodlands" WWF Scientific Report (). Accessed March 27, 2011.〕 The lower Jebel el-Akabah lies to the south and east of the Jebel Akhdar. The two highlands are separated by a depression. This eastern region, known in ancient times as Marmarica, is much drier than the Jebel Akhdar, and here the Sahara extends to the coast. Historically, salt-collecting and sponge fishing were more important than agriculture. Bomba and Tobruk have good harbors.〔 South of the coastal highlands of Cyrenaica is a large east-west running depression, extending eastward from the Gulf of Sidra into Egypt. This region of the Sahara is known as the Libyan Desert, and includes the Great Sand Sea and the Calanshio Sand Sea. The Libyan Desert is home to a few oases, including Awjila (ancient Augila) and Jaghbub. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Cyrenaica」の詳細全文を読む スポンサード リンク
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