Benthic Faunal Assemblages of the Holocene Sediments from the Southwest Black Sea Shelf

DEMET ONGAN; OYA ALGAN; SEVİNÇ KAPAN-YEŞİLYURT; ATİKE NAZİK; MUSTAFA ERGİN & CHRIST EASTOE

Makale detayları

Benthic Faunal Assemblages of the Holocene Sediments from the Southwest Black Sea Shelf

Yazarlar:

DEMET ONGAN | OYA ALGAN | SEVİNÇ KAPAN-YEŞİLYURT | ATİKE NAZİK | MUSTAFA ERGİN & CHRIST EASTOE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2009 Vol.18 Issue 2, pp.239-297

Belge Tipi:

Makale

Yayın Tarihi:

1/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000732355

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985

Özet:

 

Benthic faunal content (benthic foraminifera, mollusca and ostracoda) of sediment cores from the SW Black Sea shelf were examined. Based on the vertical distribution of abundance and diversity of the benthic fauna, three benthic assemblages were distinguished. These assemblages are BF1, BF2 and BF3, and reflect the changes in bottom water from the termination of the Neoeuxinian period to present. BF1 displays high abundance and diversity in the surroundings of the Bosporus channel, diminishing in the shelf sediments further away from the channel. In the Mid-Shelf and Outer Shelf, it displays low abundance and low diversity. BF1 which started to be deposited at about 6 ky BP reflects the source effect of the saline Mediterranean lower layer, diminishing in strength toward more distal areas. In the Outer Shelf, changing foraminiferal faunal content may suggest that relatively low salinity conditions in the bottom water were established after ~4 ky BP. BF2 consists of a mixed fauna (brackish and euryhaline Mediterranean species), suggesting transitional conditions with intrusion of Mediterranean water earlier than ~8 ky BP. BF3 corresponds to the Neoeuxinian lake phase of the Black Sea.

 

Benthic faunal content (benthic foraminifera, mollusca and ostracoda) of sediment cores from the SW Black Sea shelf were examined. Based on the vertical distribution of abundance and diversity of the benthic fauna, three benthic assemblages were distinguished. These assemblages are BF1, BF2 and BF3, and reflect the changes in bottom water from the termination of the Neoeuxinian period to present. BF1 displays high abundance and diversity in the surroundings of the Bosporus channel, diminishing in the shelf sediments further away from the channel. In the Mid-Shelf and Outer Shelf, it displays low abundance and low diversity. BF1 which started to be deposited at about 6 ky BP reflects the source effect of the saline Mediterranean lower layer, diminishing in strength toward more distal areas. In the Outer Shelf, changing foraminiferal faunal content may suggest that relatively low salinity conditions in the bottom water were established after ~4 ky BP. BF2 consists of a mixed fauna (brackish and euryhaline Mediterranean species), suggesting transitional conditions with intrusion of Mediterranean water earlier than ~8 ky BP. BF3 corresponds to the Neoeuxinian lake phase of the Black Sea.

Makale detayları

Benthic Faunal Assemblages of the Holocene Sediments from the Southwest Black Sea Shelf

Yazarlar: DEMET ONGAN | OYA ALGAN | SEVİNÇ KAPAN-YEŞİLYURT | ATİKE NAZİK | MUSTAFA ERGİN & CHRIST EASTOE

Yayıncı: TUBITAK

Dergi: Turkish Journal of Earth Sciences 2009 Vol.18 Issue 2, pp.239-297

Belge Tipi: Makale

Yayın Tarihi: 1/2009

Belge Dili: Türkçe

Document ID (Org No.): 2000732355

Sıklık: İki Aylık

eISSN: 1303-619X

pISSN: 1300-0985

Sayı

Yazarlar:

DEMET ONGAN | OYA ALGAN | SEVİNÇ KAPAN-YEŞİLYURT | ATİKE NAZİK | MUSTAFA ERGİN & CHRIST EASTOE

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Earth Sciences 2009 Vol.18 Issue 2, pp.239-297

Belge Tipi:

Makale

Yayın Tarihi:

1/2009

Belge Dili:

Türkçe

Document ID (Org No.):

2000732355

Sıklık:

İki Aylık

eISSN:

1303-619X

pISSN:

1300-0985