On the origin of the Bosphorus

Gökaşan, Erkan; Demirbağ, Emin; Oktay, Fazli Y.; ̨lu, Berkan Ecevitog; Şimşek, Mehmet; Yüce, Hüseyin

doi:10.1016/s0025-3227(97)00022-4

Cited by 77 publications

(46 citation statements)

References 7 publications

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“…When this statement is considered, this study focusing on island populations of these two species are important in terms of providing karyological data. The karyotypes revealed by this study of island populations of M. domesticus and M. macedonicus are consistent with the previously reported karyotypes of Anatolian and Thrace populations belonging to the these two species and intrapopulational variation is not observed, although those islands have been separated from the mainland about 11-7 kyr ago (Şengör and Yılmaz 1981;Oral et al 1995, Gökaşan et al 1997 and Aegean and Marmara seas have function as geographical barriers. This may mainly be resulting from an interaction between island and mainland populations by lasting transport of this rodent by human to those islands.…”

Section: Discussionsupporting

confidence: 91%

Ege Denizi ve Marmara Denizi’ndeki adalardan Türkiye kemirici faunasının karyolojisine ve yayılışına katkılar

Şeker

Selvi

Çolak

2017

Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi

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A chromosomal study on five different rodent species (Mus domesticus, Mus macedonicus, Apodemus sylvaticus, Apodemus witherbyi and Rattus rattus) from Gökçeada and Bozcaada in Aegean Sea and Marmara Island in Marmara Sea was performed to fill the deficiency of karyological information about island populations of these species. Diploid chromosome sets (2n) and fundamental numbers of chromosomal arms (NF) were determined to be 2n = 40, 40, 48, 48 and 38, NF = 40, 40, 48, 48 and 60 for M. domesticus, M. macedonicus, A. sylvaticus, A. witherbyi and R. rattus respectively. Results showed that there was no difference between karyological values in island and continental populations of those rodents, although Aegean and Marmara seas have served as geographic barriers for a long time between islands and mainland. In addition to the karyotypes of M. domesticus, M. macedonicus, A. sylvaticus and R. rattus, their presence in Marmara Islands were firstly determined by current study. Özet Beş farklı kemirici türünün (Mus domesticus, Mus macedonicus, Apodemus sylvaticus, Apodemus witherbyi ve Rattus rattus)Türkiye'deki ada populasyonlarına ilişkin karyolojik bilgi eksikliğini gidermek amacıyla, bu türlerin Ege Denizi'nde yer alan Gökçeada ve Bozcaada ile Marmara Denizi'nde yer alan Marmara Adası'nda yayılış gösteren populasyonları üzerine kromozomal bir çalışma gerçekleştirilmiştir. M. domesticus, M. macedonicus, A. sylvaticus, A. witherbyi ve R. rattus için diploit kromozom sayıları ve temel kromozom kol sayıları sırasıyla 2n = 40, 40, 48, 48 ve 38, NF = 40, 40, 48, 48 ve 60 olarak belirlenmiştir. Ege Denizi ve Marmara Denizi bu türlerin adalarda ve anakarada yayılış gösteren populasyonları arasında gen akışının kesilmesine neden olan coğrafik bariyerler olarak uzun süredir görev yapmaktadır, buna rağmen, bu çalışma ile bu kemirici türlerinin adalarda ve anakarada yayılış gösteren populasyonları arasında karyolojik bakımdan herhangi bir farklılaşma olmadığı tespit edilmiştir. Ayrıca, M. domesticus, M. macedonicus, A. sylvaticus ve R. rattus'un Marmara Adası'nda yayılış gösterdiği ilk kez bu çalışma ile belirlenmiştir.

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Section: Discussionsupporting

confidence: 91%

Ege Denizi ve Marmara Denizi’ndeki adalardan Türkiye kemirici faunasının karyolojisine ve yayılışına katkılar

Şeker

Selvi

Çolak

2017

Artvin Çoruh Üniversitesi Orman Fakültesi Dergisi

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“…The Strait of Istanbul consists of linear channel fragments in the NE-SW, NW-SE, and N-S directions. Previous studies suggested that coastlines of the strait were controlled by faults (Alavi et al, 1989;Gökaşan et al, 1997;2005a;Demirbag et al, 1999;Oktay et al, 2002). Lineaments in similar directions were observed around the Strait ofİstanbul (Eroskay and Kale, 1986; Gökaşan et al, 2002; inset A of Fig.…”

Section: Morphology Of the Study Areasupporting

confidence: 66%

“…This erosional surface was rejuvenated by tectonic activities and sea level fluctuations during the Quaternary period when some parts of the mature erosional surface were lowered by faults to became the base level for deposition, while other parts were elevated (Emre et al, 1998;Demirbag et al, 1999;Yaltırak et al, 2002). One of the depressional areas developed in this period is the Strait ofİstanbul (Alavi et al, 1989;Gökaşan et al, 1997Gökaşan et al, , 2005aDemirbag et al, 1999;Oktay et al, 2002;Fig. 6(a)).…”

Section: Morphology Of the Study Areamentioning

confidence: 99%

“…The morphology of the terrestrial area around the Marmara Sea, including theİstanbul and Kocaeli Peninsulas, is dominantly implied by a mature horizontal erosional surface that developed during the Upper Miocene-Pliocene pe- riod (Cvijic, 1908;Pamir, 1938;Perinçek, 1991;Emre et al, 1998;Gökaşan et al, 1997;Erinç, 2000;Elmas, 2003;Yigitbaş et al, 2004;Yılmaz, 2006;Gökaşan et al, 2005a). Fragments of this surface are still traceable at different elevations along the area.…”

Section: Morphology Of the Study Areamentioning

confidence: 99%

“…This left lateral fault zone was thought to have been formed by the activity of the NS-NAF, which led to formation of the Strait ofİstanbul. These recent studies indicate that the secondary faults around the principle deformation zone in the Marmara Sea (NS-NAF) may have played an important role in the formation of the morphological features and local earthquakes in this area (Gökaşan et al, 1997;Oktay et al, 2002;Gökaşan et al, , 2003Pınar et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

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An example of secondary fault activity along the North Anatolian Fault on the NE Marmara Sea Shelf, NW Turkey

Tur

2007

Earth Planet Sp

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Seismic data on the NE Marmara Sea Shelf indicate that a NNE-SSW-oriented buried basin and ridge system exist on the sub-marine extension of the Paleozoic Rocks delimited by the northern segment of the North Anatolian Fault (NS-NAF), while seismic and multi-beam bathymetric data imply that four NW-SE-oriented strike-slip faults also exist on the shelf area. Seismic data indicate that NW-SE-oriented strike-slip faults are the youngest structures that dissect the basin-ridge system. One of the NW-SE-oriented faults (F1) is aligned with a rupture of the North Anatolian Fault (NAF) cutting the northern slope of the Ç ınarcık Basin. This observation indicates that these faults have similar characteristics with the NS-NAF along the Marmara Sea. Therefore, they may have a secondary relation to the NAF since the principle deformation zone of the NAF follows the Marmara Trough in that region. The seismic energy recorded on these secondary faults is much less than that on the NAF in the Marmara Sea. These faults may, however, produce a large earthquake in the long term.

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Earliest Records of Holocene Cetaceans in the Black Sea

Aiken,

Gladilina,

Çakirlar

et al. 2024

J Quaternary Science

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The timing of the Holocene transition of the Black Sea from a brackish lake to a marine sea has long been debated. Here, we report on the earliest records of cetaceans in the Black Sea region as a proxy for the connection with the Mediterranean and the transition from a brackish to marine environment. We base our analysis on cetacean skeletal finds and archival data on cetacean skeletal remains from the Bosphorus, the western, northern and eastern Black Sea, and the Kerch Strait. We find that all three contemporary cetacean species in the Black Sea – the harbour porpoise, bottlenose dolphin and common dolphin – had migrated out of the Mediterranean to the Bosphorus and the Black Sea at least 8000–7000 years ago and reached the northern Black Sea by 5500 years ago at the latest. Our study suggests the establishment of a Mediterranean–Black Sea biogeographical connection for marine vertebrates at least 7000 years ago. The early presence of cetaceans in the Black Sea has implications for understanding its Holocene transition, as well as the evolutionary and ecological history of these species more generally.

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On the origin of the Bosphorus

Cited by 77 publications

References 7 publications

Ege Denizi ve Marmara Denizi’ndeki adalardan Türkiye kemirici faunasının karyolojisine ve yayılışına katkılar

Ege Denizi ve Marmara Denizi’ndeki adalardan Türkiye kemirici faunasının karyolojisine ve yayılışına katkılar

An example of secondary fault activity along the North Anatolian Fault on the NE Marmara Sea Shelf, NW Turkey

Earliest Records of Holocene Cetaceans in the Black Sea

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