Middle–late Pleistocene marine molluscs from Izmit Bay area (eastern Marmara Sea, Turkey) and the nature of Marmara – Black Sea corridors

Unlike other seas of the world, the Black Sea shows unique quality and trophic properties. Fortunately, only the upper layer water of the Black Sea is introduced into the Bosphorus and has a significant effect on the quality and trophic conditions of the Marmara Sea. These effects are discussed in the light of data obtained from collaborative efforts of Turkish and Romanian research institutions and processed satellite images. In conjunction with these discussions, recommendations for a suitable effluent disposal strategy for Istanbul's wastewater have been given.

Download Full-text

Environmental model studies for the Istanbul master plan. Part I: hydrodynamical design basis and marine disposal of wastewater

Water Science & Technology ◽

10.2166/wst.1995.0090 ◽

1995 ◽

Vol 32 (2) ◽

pp. 141-148 ◽

Cited By ~ 1

Author(s):

I. S. Hansen ◽

H. J. Vested ◽

M. A. Latif

Keyword(s):

Black Sea ◽

Layer Structure ◽

The Black Sea ◽

Marmara Sea ◽

Junction Area ◽

3 Dimensional ◽

Model Studies ◽

Model Set ◽

Characteristic Features ◽

Set Up

A modelling study of the hydrodynamics and spreading of wastewater from existing and future outfalls in the Bosphorus region has been conducted applying a 3-Dimensional model. The modelling is based on SYSTEM 3, which is a general modelling system for baroclinic flow simulating unsteady currents, waterlevels, salinity and temperature within the model area. The model set-up covers the Black Sea-Bosphorus-Marmara Sea junction area. The set-up is calibrated by data from a dedicated field program and previous field experience. The model is designed to describe the characteristic features of the flow in the junction area such as the effects of variations in waterlevel differences between the Sea of Marmara and the Black Sea on the important two-layer structure in the strait and the flow fields generated by the upper layer jet in the Bosphorus-Marmara junction. This model has been applied for evaluation of disposal of wastewater and for the subsequent water quality studies. The general use of a baroclinic 3-D hydrodynamic model to simulate disposal of wastewater is discussed. Examples of the application of the model of the junction area to evaluate the different strategies for disposal of wastewater are presented.

Download Full-text

Bioerosion on Late Pleistocene (MIS 7 and MIS 5e) marine molluscs A palaeoclimatological and palaeoecological comparison with modern beaches (Río Negro, Argentina)

Acta Geologica Sinica - English Edition ◽

10.1111/1755-6724.14692 ◽

2021 ◽

Author(s):

Melisa P. Charó ◽

Gisela D. Charó ◽

Guillermo Aceñolaza ◽

Jose L. Cavallotto

Keyword(s):

Late Pleistocene ◽

Marine Molluscs ◽

Rio Negro ◽

Mis 5E

Download Full-text

Dynamics of the coastal North Black Sea area in Late Pleistocene and Holocene and early human dispersal

Quaternary International ◽

10.1016/j.quaint.2008.04.002 ◽

2009 ◽

Vol 197 (1-2) ◽

pp. 27-34 ◽

Cited By ~ 13

Author(s):

Pavel M. Dolukhanov ◽

Sergei V. Kadurin ◽

Evgeny P. Larchenkov

Keyword(s):

Late Pleistocene ◽

Black Sea ◽

Human Dispersal ◽

Sea Area ◽

Early Human

Download Full-text

Investigation of 3-D basin structures in the İzmit Bay area (Turkey) by single-station microtremor and gravimetric methods

Geophysical Journal International ◽

10.1111/j.1365-246x.2011.05085.x ◽

2011 ◽

Vol 186 (2) ◽

pp. 883-894 ◽

Cited By ~ 42

Author(s):

Serdar Özalaybey ◽

Ekrem Zor ◽

Semih Ergintav ◽

M. Cengiz Tapırdamaz

Keyword(s):

Izmit Bay ◽

Bay Area ◽

Single Station

Download Full-text

Lack of marine entry into Marmara and Black Sea-lakes indicate low relative sea level during MIS 3 in the northeastern Mediterranean

10.5194/cp-2019-30 ◽

2019 ◽

Author(s):

Anastasia G. Yanchilina ◽

Celine Grall ◽

William B. F. Ryan ◽

Jerry F. McManus ◽

Candace O. Major

Keyword(s):

Sea Level ◽

Black Sea ◽

Global Ocean ◽

The Black Sea ◽

Marmara Sea ◽

Independent Data ◽

Relative Sea Level ◽

Mis 3 ◽

History Of ◽

Marine Isotope Stage 3

Abstract. The Marine Isotope Stage 3 (MIS 3) is considered a period of persistent and rapid climate and sea level variabilities during which eustatic sea level is observed to have varied by tens of meters. Constraints on local sea level during this time are critical for further estimates of these variabilities. We here present constraints on relative sea level in the Marmara and Black Sea regions in the northeastern Mediterranean, inferred from reconstructions of the history of the connections and disconnections (partial or total) of these seas together with the global ocean. We use a set of independent data from seismic imaging and core-analyses to infer that the Marmara and Black Seas remained connected persistent freshwater lakes that outflowed to the global ocean during the majority of MIS 3. Marine water intrusion during the early MIS-3 stage may have occurred into the Marmara Sea-Lake but not the Black Sea-Lake. This suggests that the relative sea level was near the paleo-elevation of the Bosporus sill and possibly slightly above the Dardanelles paleo-elevation, ~80 mbsl. The Eustatic sea level may have been even lower, considering the isostatic effects of the Eurasian ice sheet would have locally uplifted the topography of the northeastern Mediterrranean.

Download Full-text

Taxonomic status of Flexopecten glaber ponticus (Bucquoy, Dautzenberg & Dollfus, 1889) – the Black Sea Flexopecten glaber (Linnaeus, 1758) (Bivalvia: Pectinidae)

Marine Biological Journal ◽

10.21072/mbj.2018.03.4.03 ◽

2018 ◽

Vol 3 (4) ◽

pp. 14-28 ◽

Cited By ~ 1

Author(s):

I. P. Bondarev

Keyword(s):

Comparative Analysis ◽

Black Sea ◽

Taxonomic Status ◽

Morphological Data ◽

Valid Species ◽

The Black Sea ◽

Marmara Sea ◽

History Of ◽

The Mediterranean ◽

The Republic

The name Flexopecten glaber ponticus (Bucquoy, Dautzenberg & Dollfus, 1889) is generally used for the only Pectinidae representative inhabiting the Black Sea. It is registered in the Red Book of the Republic of Crimea as endemic subspecies reducing in amount. F. glaber ponticus is listed in WoRMS MolluscaBase as the only accepted subspecies of Flexopecten glaber (Linnaeus, 1758). In the past its taxonomic status has been changed from a geographic variety to valid species. The purpose of this study is to establish its correct taxonomic status. The study is based on a comparative analysis of conchological features of Flexopecten glaber and F. glaber ponticus in relation with the brief natural history of population in the Black Sea. Sampling was performed by snorkel equipment in Kazach’ya Bay (Black Sea, Crimea, Sevastopol) at 2–6 m depths. A total of 100 scallop specimens were sampled in September 2017. To assure a better understanding in a broader context those results are compared with the previously published morphological data based on the analysis of a large amount of material from the Black Sea and the Mediterranean Sea – Marmara Sea regions. Comparative analysis of conchological features of F. glaber ponticus from the Black Sea with F. glaber from the Mediterranean region has not revealed any distinct differences between them. Thus, there are no evidenced data for the diagnosis of F. glaber ponticus as a subspecies. Species F. glaber appeared in the Black Sea not earlier than 7,000 years ago and formed a well developed population less than 3,000 years ago. We have to conclude that the specified divergence period is not long enough to form a subspecies. As a result of the present survey the subspecific status of F. glaber ponticus is not retained and the name is placed in synonymy of the parent species Flexopecten glaber.

Download Full-text

An operational implementation of the GHER model for the Black Sea, with SST and CTD data assimilation

Ocean Science Discussions ◽

10.5194/osd-6-1895-2009 ◽

2009 ◽

Vol 6 (2) ◽

pp. 1895-1911 ◽

Cited By ~ 2

Author(s):

L. Vandenbulcke ◽

A. Capet ◽

J. M. Beckers ◽

M. Grégoire ◽

S. Besiktepe

Keyword(s):

Black Sea ◽

Initial Conditions ◽

Sea Surface ◽

The Black Sea ◽

Marmara Sea ◽

Reduced Rank ◽

Data Transfers ◽

Time Required ◽

Assimilation Scheme

Abstract. In this article, we describe the first operational implementation of the GHER hydrodynamic model. This happened onboard the research vessel "Alliance", in the context of the Turkish Straits System 2008 campaign, which aimed at the real-time characterization of the Marmara Sea and (south-western) Black Sea. The model performed badly at first, mainly because of poor initial conditions. Hence, as the model includes a reduced-rank extended Kalman filter assimilation scheme, after a hindcast where sea surface temperature and temperature and salinity profiles were assimilated, the model yielded realistic forecasts. Furthermore, the time required to run a one-day simulation (about 5 min of simulation, or 10 min with pre-processing and data transfers included) is very limited and thus operational use of the model is possible.

Download Full-text