scholarly journals River systems and their water and sediment fluxes towards the marine regions of the Mediterranean Sea and Black Sea earth system. An overview

2019 ◽  
Vol 20 (3) ◽  
pp. 549 ◽  
Author(s):  
SERAFEIM E POULOS
Keyword(s):  
Mediterranean Sea ◽  
Suspended Sediment ◽  
Black Sea ◽  
Water Discharge ◽  
The Black Sea ◽  
Marmara Sea ◽  
Earth System ◽  
River Systems ◽  
Water Load ◽  
The Mediterranean

A quantitative assessment of the riverine freshwater, suspended and dissolved sediment loads is provided for the watersheds of the four primary (Western Mediterranean-WMED, Central Mediterranean-CMED, Eastern Mediterranean-EMED and Black Sea-BLS) and eleven secondary marine regions of the Mediterranean and Black Sea Earth System (MBES). On the basis of measured values that cover spatially >65% and >84% of MED and BLS watersheds, respectively, water discharge of the MBES reaches annually almost the 1 million km3, with Mediterranean Sea (including the Marmara Sea) to provide 576 km3 and the Black Sea (included the Azov Sea) 418 km3. Among the watersheds of MED primary marine regions, the total water load is distributed as follows: WMED= 180 km3; CMED= 209 km3; and EMED= 187 km3. The MBES could potentially provide annually some 894 106 t of suspended sediment load (SSL), prior to river damming, most of which (i.e., 708 106 t is attributed to MED). Between MED primary marine regions, CMED receives the highest amount of suspended sediment (287 106 t), followed by WMED (239 106 t) and EMED 182 106 t, while 185 106 t are delivered to BLS. The dissolved load (DL) of MBES is about 376 106 t, from which 215 106 t (approximately 57%) is provided by the MED watershed. The large river systems (watershed>104 km2) provide >85% of the water load, >80% of SSL and >60% of DL of both MED and BLS.

scholarly journals Assessment of goatfish fisheries in Turkey based on the microdata set of official landing statistics

2021 ◽  
Vol 38 (3) ◽  
pp. 303-309
Author(s):  
Nuray Çelik Mavruk ◽  
Sinan Mavruk ◽  
Dursun Avşar
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Large Scale ◽  
Aegean Sea ◽  
Bottom Trawl ◽  
The Black Sea ◽  
Marmara Sea ◽  
Trawl Fishery ◽  
Red Mullet ◽  
The Mediterranean

Although goatfishes (Mullidae Rafinesque, 1815) are among the most important commercial fishes in Turkey, no research has been found investigating the characteristics and spatial patterns of goatfish fishery. Here, we assessed the goatfish fishery of Turkey based on the microdata set of Turkish National Fishery Statistics gathered by Turkish Statistical Institute (TÜİK) between 2014 and 2017. In this context, we investigated the variation of total goatfish catch by cities. In addition, we compared the contribution of small (boat <10m) and large scale (boat >10m) fishers as well as different fishing techniques to the total goatfish catch in Turkey. Finally, an evaluation was made on the discard rates recorded in the official landing statistics. The results showed that higher red mullet (Mullus barbatus Linnaeus, 1758) catch was reported in the eastern Mediterranean, whereas surmullet (Mullus surmuletus Linnaeus, 1758) catch was significantly higher in the western Black Sea. On the other hand, fishery-independent investigations revealed that the Turkish fishery fleet mostly catches red mullet throughout the coasts of Turkey. Therefore, the separate records of red mullet and surmullet in the landing statistics likely represent the local names of red mullet rather than two different species. Large scale fishers were the main source of fishery pressure in the Mediterranean Sea, the Aegean Sea and the Black Sea. However, the majority of the catch was landed by small scale fishers in the Marmara Sea. The bottom trawl fishery landed 88, 92 and 87% of total goatfish catch in the Black Sea, the Aegean Sea and the Mediterranean Sea, respectively. Purse seiners provided the largest part of total goatfish catch (40%) in the Marmara Sea, where the bottom trawl fishery is prohibited. The overall average for the discard rate was found to be 0.47%. There were no statistically significant differences among the discard rates of two species, marine regions or fishing methods.

scholarly journals First record of the Combtooth Blenny, Microlipophrys adriaticus (Steindachner & Kolombatovic, 1883) (Pisces, Blenniidae), for the Italian Ionian Sea

Check List ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 1646 ◽  
Author(s):  
F. Tiralongo ◽  
R. Baldacconi
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Adriatic Sea ◽  
First Record ◽  
The Black Sea ◽  
Ionian Sea ◽  
Sea Of Marmara ◽  
Limited Distribution ◽  
The North ◽  
The Mediterranean

Microlipophrys adriaticus (Steindachner & Kolombatovic, 1883) is an endemic blenny of the Mediterranean Sea. It is also known from the Sea of Marmara and the Black Sea. However, unlike other species of combtooth blennies, M. adriaticus is a fish with a limited distribution in Adriatic Sea, especially in the north, where it can be common. We report here the first record of this species from the waters of the Ionian Sea.

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

2018 ◽  
Vol 3 (4) ◽  
pp. 14-28 ◽  
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.

scholarly journals RUSSIAN-TURKISH WAR 1877-1878 IN IRANIAN HISTORIOGRAPHY OF THE XIX CENTURY AND MODERN IRANIAN HISTORIOGRAPHY

2020 ◽  
Vol 2 (1) ◽  
pp. 56-61
Author(s):  
MOHAMMAD SALMASIZADEH ◽  
Keyword(s):  
Mediterranean Sea ◽  
Ottoman Empire ◽  
Black Sea ◽  
World Trade ◽  
The Black Sea ◽  
Historical Event ◽  
Territorial Expansion ◽  
Eastern Question ◽  
The Mediterranean ◽  
Xix Century

The conflict between the Russian and Turkish in 1877-1878, though formed on the pretext of Russia's support for Christian nations under the rule of the Ottoman Empire, was actually part of the great scheme that European governments had begun to break up the Ottoman Empire and resolve the Eastern Question. The goals of these powers for world domination, that would sometimes results in wars among themselves, were mainly focused on expanding the territorial realm and winning economic gains. These goals were followed under the disguise of gaining freedom for Christians and securing independence for non-Turkish nations. The scientific and technological impairment of the Ottoman Empire compared to the European countries, accompanied by internal rivalries and frequent overthrow of the rulers, were some of the main weaknesses of the Ottoman state causing their demise. In the meantime, Russia was in pursue of its policy of territorial expansion and seeking access to warm waters. Russia's main objective was to obtain access to the Black Sea and the Mediterranean Sea. Having control over the Straits of Bosporus and Dardanelles that were under the rule of the Ottoman Empire would have connected Russia to the center of world trade in the Mediterranean and would have freed Russia from its land blockages and frozen ports. The causality, the start, and the ramifications of these wars have been reflected in the Iranian historiography of that era. Mohammad Hassan Khan Etemad al-Saltanah, a great historian of the Nasereddin Shah Qajar Age (1848-1898), using the reports of Iranian officials in Russia and the Ottoman Empire, and two books of Montazame Nasseri and Merat al-Boldan that were translations of selected articles from the French and Ottoman newspapers have recorded this important historical event. The reasons for Iranian attention to this historical event forms part of the modern and global historiography of Iran, in which attention to the developments in the Ottoman Empire plays an important role in Iran's acquaintance with modern civilization.

Verruca stroemia and Verruca spengleri (Crustacea: Cirripedia): distribution in the north-eastern Atlantic and the Mediterranean Sea

2003 ◽  
Vol 83 (1) ◽  
pp. 89-93 ◽  
Author(s):  
Paulo S. Young ◽  
Helmut Zibrowius ◽  
Ghazi Bitar
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
Geographic Distribution ◽  
Deep Water ◽  
Southern Spain ◽  
The Black Sea ◽  
The North ◽  
North Eastern ◽  
The Mediterranean ◽  
Gorringe Bank

The geographic distribution of Verruca stroemia and V. spengleri are reviewed. Verruca stroemia ranges from the White, Barents, Norwegian, and North Seas south to Portugal to the Algarve and to Gorringe Bank. All of the records of this species from the Mediterranean Sea are considered to be V. spengleri. Verruca spengleri occurs in the Azores and Madeira archipelagos, in southern Spain (Cádiz), throughout the Mediterranean Sea from Gibraltar to Lebanon, and in the Black Sea. But a distinct deep-water Verruca species seems to occur in the deep Mediterranean.

scholarly journals PONTO-CASPIAN AND MEDITERRANEAN FAUNAL AND FLORAL RECORDS OF UPPER PLEISTOCENE-HOLOCENE SEDIMENTS FROM THE İZMİT GULF (MARMARA SEA, TURKEY)

2021 ◽  
pp. 23-62
Author(s):  
ELMAS KIRCI-ELMAS ◽  
ATIKE NAZIK ◽  
SEVINÇ KAPAN ◽  
ENGIN MERIÇ ◽  
EMINE ŞEKER ZOR ◽  
...  
Keyword(s):  
Black Sea ◽  
Environmental Changes ◽  
The Black Sea ◽  
Marmara Sea ◽  
Mis 3 ◽  
The Mediterranean ◽  
Mollusc Assemblages ◽  
Mis 5 ◽  
Palaeoenvironmental Changes

İzmit Gulf is located between Kocaeli and Armutlu peninsulas at east of Marmara Sea and the interaction area of North Anatolian Fault Zone (NAFZ) and Marmara Graben systems. In this study, the faunal and floral contents (ostracod, foraminifer, mollusc and diatom) of the samples belonging to seven drilling cores were studied and obtained the radiocarbon and optically stimulated luminescence (OSL) age data in order to establish on the Black Sea – Marmara Sea - Mediterranean water connections and palaeoenvironmental changes. The sediments in this study are Late Pleistocene-Holocene aged and only cover the Marine Isotope Stages MIS-5 (interglacial), MIS-3 (an interstadial period between MIS-4 and MIS-2 glacial epochs) and MIS-1. The determination of ostracod and mollusc fauna of the Mediterranean and Ponto-Caspian origin provide important clues to water exchange between the Mediterranean and the Black Sea. Although some Mediterranean originated ostracods occur sporadically with low abundance, absence of foraminiferal fauna and existence of Ponto-Caspian ostracods together with fresh water and cosmopolitan diatom flora indicate that the area strongly interacted with the Black Sea waters during MIS-5. The faunal and floral characteristics of the sediments deposited during MIS-3, clearly denote that the Izmit Gulf was connected with the Black Sea and the Mediterranean Sea at the beginning of MIS-3 (ca. 52.0 - 40.0 ky BP) and the shallow shelf areas were frequently affected by both the Black Sea discharge and Mediterranean input. A thick Holocene sedimentary sequence recovered from the southern Hersek Burnu drilling cores reflects the environmental changes after the latest Black-Mediterranean seas connection. The studied ostracod and mollusc assemblages are mainly characterized by the Mediterranean originated species with a few relict Ponto-Caspian fauna. Also, the benthic foraminiferal assemblages are dominated by normal marine and euryhaline species, reflecting the salinity fluctuations in the Holocene interval.

Assessment of the influence of material glaciation in the Northern Hemisphere on the processes of water desalination in the Mediterranean Sea in the Pliocene-Pleistocene

2019 ◽  
pp. 1-7
Author(s):  
Nikolay V. Esin ◽  
Nikolay I. Esin ◽  
Igor S. Podymov ◽  
Anna V. Lifanchuk ◽  
Irina V. Melnikova
Keyword(s):  
Mediterranean Sea ◽  
Sea Level ◽  
Northern Hemisphere ◽  
Black Sea ◽  
Water Desalination ◽  
The Black Sea ◽  
Geological Data ◽  
Ocean Water ◽  
The Mediterranean ◽  
Freshwater Balance

The article calculates the freshwater balance of the ancient Black and Caspian seas and estimates the volume of water flowing from the Black Sea to the Mediterranean during the melting of glaciers. It is shown that during this period up to 855 km3/year of freshwater is discharged into the Mediterranean Sea, which is involved in the formation of sea level. A comparison of calculations and geological data showed that there are no signs of the influx of salty ocean water into the Akchagyl Sea. It was also shown that water from the ocean cannot flow up since the sea level was below sea level.

scholarly journals Records of Polydora cornuta and Streblospio gynobranchiata (Annelida, Spionidae) from the Black Sea

2013 ◽  
Vol 14 (2) ◽  
pp. 261 ◽  
Author(s):  
V.I. RADASHEVSKY ◽  
Z.P. SELIFONOVA
Keyword(s):  
Mediterranean Sea ◽  
Black Sea ◽  
The Black Sea ◽  
Sea Of Azov ◽  
Soft Bottom ◽  
Diagnostic Characters ◽  
The Sea Of Azov ◽  
Bottom Communities ◽  
History Of ◽  
The Mediterranean

Two spionid polychaetes, Polydora cornuta and Streblospio gynobranchiata, were identified in benthic samples collected in the northern Black Sea and adjacent waters. These species have earlier been classified as the worst invaders in soft bottom communities in the Mediterranean Sea. Polydora cornuta had been previously misidentified and widely reported from the Black Sea and the Sea of Azov as P. ciliata, P. ciliata limicola and P. limicola. Streblospio gynobranchiata is a new invader currently extending its distribution into the Mediterranean, Black and Caspian Seas. Morphology, diagnostic characters and biology of the species are discussed and the history of their records in the Mediterranean, Black and Caspian Seas and the Sea of Azov is reviewed.  

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