scholarly journals The First Finding of Bryozoan Pectinatella Magnifica (Lophopodidae) in Lower Danube

2014 ◽  
Vol 48 (4) ◽  
pp. 307-312 ◽  
Author(s):  
B. Aleksandrov ◽  
O. Voloshkevich ◽  
A. Kurakin ◽  
A. Rybalko ◽  
V. Gontar
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Delta Region ◽  
First Finding ◽  
Pectinatella Magnifica ◽  
First Time

Abstract The freshwater bryozoan Pectinatella magnifica (Leidy, 1851) was found for the first time in the Ukrainian part of the Danube Delta (Poludionniy arm, 45°25.00˝ N, 29°45.25˝ E) in 2005. Since then, it has increased in abundance. Th e greatest colony numbers occurred on both dead and living reed stems in the delta region 1.5-2.0 km upstream from the Black Sea.

scholarly journals FIRST FINDING OF EPIBIONT PERITRICH AND SUCTORIAN CILIATES (CILIOPHORA) ON OLIGOCHAETES AND HARPACTICOID COPEPODS FROM THE DEEP-WATER HYPOXIC/ANOXIC CONDITIONS OF THE BLACK SEA

2014 ◽  
Vol 1 (1) ◽  
pp. 49-54 ◽  
Author(s):  
Nelli Sergeeva ◽  
Igor Dovgal
Keyword(s):  
Black Sea ◽  
Deep Water ◽  
The Black Sea ◽  
Anoxic Conditions ◽  
First Finding ◽  
Harpacticoid Copepods ◽  
First Time

Three species of commensal ciliates (Cothurnia maritima Ehrenberg, 1838 on oligochaete Tubificoides sp.; Paracineta livadiana (Mereschkowsky, 1881) and Corynophrya lyngbyi (Ehrenberg, 1834) on harpacticoid copepods Amphiascella subdebilis (Willey, 1935), Haloschizopera pontarchis Por, 1959, Cletodes tenuipes Scott, 1896 and Enhydrosoma longifurcatum Sars, 1909) were found in the Black Sea deep-water under hypoxic/anoxic conditions for the first time. Corynophrya lyngbyi is reported for the first time in the Black Sea.

scholarly journals Sedimentary microplastic concentrations from the Romanian Danube River to the Black Sea

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Iulian Pojar ◽  
Adrian Stănică ◽  
Friederike Stock ◽  
Christian Kochleus ◽  
Michael Schultz ◽  
...  
Keyword(s):  
Black Sea ◽  
Danube River ◽  
The Black Sea ◽  
Danube Delta ◽  
Black Sea Coast ◽  
River Danube ◽  
Terrestrial Environments ◽  
Ultimate Fate ◽  
First Time ◽  
Sea Coast

AbstractA multitude of recent studies have detailed microplastic concentrations in aquatic and terrestrial environments, although questions remain over their ultimate fate. At present, few studies have detailed microplastic characteristics and abundance along a freshwater–marine interface, and considerable uncertainties remain over the modelled contribution of terrestrial and riverine microplastic to the world’s oceans. In this article, for the first time, we detail sedimentary microplastic concentrations along a River–Sea transect from the lower reaches of a major continental river, the River Danube, through the Danube Delta, the Black Sea coast to the Romanian and Bulgarian inner shelf of the Black Sea. Our results indicate that isolated areas of the Danube Delta are still relatively pristine, with few microplastic particles in some of the sediments sampled.

scholarly journals Cadmium influence on benthic foraminifera of the Black sea shelf (Danube delta region)

2017 ◽  
Keyword(s):  
Black Sea ◽  
Benthic Foraminifera ◽  
Heavy Metal Contamination ◽  
Morphological Changes ◽  
Field Studies ◽  
The Black Sea ◽  
Cadmium Content ◽  
Danube Delta ◽  
Delta Region ◽  
Geographic Ranges

The work is devoted to application of the benthic foraminifera for an evaluation of an geoecological situation on a northwest shelf of the Black Sea. The awake role of organisms with carbonaceous function is marked during biological absorption of toxic bonds. The attributes of stressful situations on population and organismic level include a degree of a surviving of species and morphological changes of the foraminifera. These parameters applied for abjection of geographic ranges of a toxic stimulation, development and anomalous morphology of organisms. Purpose. The aim of this work is to analyze the effect of significant cadmium content on benthic foraminifers of the Black Sea shelf (Danube Delta region). Methods. Field studies provided for the selection, documentation and preparation of analytical samples. Micro-paleontological and lithologic-geochemical studies of bottom sediments were carried out in accordance with accepted methods. The method for studying foraminifera includes the following operations: sampling, separation, preservation and preparation for analysis, taxonomic identification, morphological analysis, biomineralogical studies and mathematical processing of results. Results. The conducted observations confirm the possibility of differentiated assessment of heavy metal contamination by the example of cadmium in the shelf Black Sea. Areas of pollution are characterized by a decrease in the species diversity of foraminifera compared to uncontaminated areas. In sediments with a high content of cadmium, foraminifera are characterized by depressed forms with numerous deformities. Conclusions. A significant concentration of cadmium strongly affects the occurrence of foraminifera and the appearance of morphological anomalies in their shells.

LUMINESCENCE OF THE BLACK SEA MICROSCOPIC FUNGI CULTURES

2017 ◽  
Author(s):  
Olga Mashukova ◽  
Olga Mashukova ◽  
Yuriy Tokarev ◽  
Yuriy Tokarev ◽  
Nadejda Kopytina ◽  
...  
Keyword(s):  
Fresh Water ◽  
Black Sea ◽  
Ethyl Alcohol ◽  
Light Emission ◽  
Sea Water ◽  
Control Culture ◽  
Chemical Stimulation ◽  
The Black Sea ◽  
The Given ◽  
First Time

We studied for the first time luminescence characteristics of the some micromycetes, isolated from the bottom sediments of the Black sea from the 27 m depth. Luminescence parameters were registered at laboratory complex “Svet” using mechanical and chemical stimulations. Fungi cultures of genera Acremonium, Aspergillus, Penicillium were isolated on ChDA medium which served as control. Culture of Penicillium commune gave no light emission with any kind of stimulation. Culture of Acremonium sp. has shown luminescence in the blue – green field of spectrum. Using chemical stimulation by fresh water we registered signals with luminescence energy (to 3.24 ± 0.11)•108 quantum•cm2 and duration up to 4.42 s, which 3 times exceeded analogous magnitudes in a group, stimulated by sea water (p < 0.05). Under chemical stimulation by ethyl alcohol fungi culture luminescence was not observed. Culture of Aspergillus fumigatus possessed the most expressed properties of luminescence. Stimulation by fresh water culture emission with energy of (3.35 ± 0.11)•108 quantum•cm2 and duration up to 4.96 s. Action of ethyl alcohol to culture also stimulated signals, but intensity of light emission was 3–4 times lower than under mechanical stimulation. For sure the given studies will permit not only to evaluate contribution of marine fungi into general bioluminescence of the sea, but as well to determine places of accumulation of opportunistic species in the sea.

ANALYSIS OF THE FUNCTIONING OF MARINE ECOSYSTEMS ON CHANGING THE PARAMETERS OF THE BIOLUMINESCENCE FIELD ON THE CRIMEAN BLACK SEA SHELF

2017 ◽  
Author(s):  
Svetlana Rubtsova ◽  
Svetlana Rubtsova ◽  
Natalya Lyamina ◽  
Natalya Lyamina ◽  
Aleksey Lyamin ◽  
...  
Keyword(s):  
Black Sea ◽  
Field Intensity ◽  
Deep Water ◽  
Coastal Waters ◽  
Integrated Management ◽  
Abiotic Factors ◽  
Environmental Safety ◽  
The Black Sea ◽  
Intensity Increase ◽  
First Time

The concept of a new approach to environmental assessment is offered in the system of integrated management of the resource and environmental safety of the coastal area of the Black Sea. The studies of the season and daily changeability in the bioluminescence field in the Sevastopol coastal waters has been conducted. For the first time considerable differences in the bioluminescence field seasonal changes in the surface and deep water layers and the reasons conditioning this phenomenon have been shown, using a method of multidimensional statistical analysis. The bioluminescence field vertical profile change in the Black sea coastal waters in the autumn period at night has been studied. It has been shown that according to the character of bioluminescence parameters dynamics a water column can be divided into layers: upper (0 – 35 m) and deep water (36 – 60 m). It has been revealed that life rhythms of the plankton community are the main reason for the bioluminescence field intensity variability. It has been revealed that 14-hour periodicity of the bioluminescence field is related to the changes in light and its variations with 2,5…4,5 hours are conditioned by planktonts endogenous daily rhythms. And here biotic factors effect mostly periodicity of the bioluminescence field intensity increase and fall down at the dark time of the day. Abiotic factors are of less importance in circadian rhythmic of the bioluminescence field in the neritic zone.

scholarly journals Associations of Phoretic Mites on Bark Beetles of the Genus Ips in the Black Sea Mountains of Turkey

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 516
Author(s):  
Cihan Cilbircioğlu ◽  
Marta Kovač ◽  
Milan Pernek
Keyword(s):  
Black Sea ◽  
Bark Beetles ◽  
Pinus Nigra ◽  
Mite Species ◽  
Tree Bark ◽  
The Black Sea ◽  
Forest Pests ◽  
Larval Stages ◽  
Suitable Habitats ◽  
First Time

Phoretic mites use bark beetles for transportation to new, suitable habitats. Some phoretic mites act as predators and parasitoids of the bark beetles’ immature stages, especially egg and early larval stages, and are potential agents for the biological control of scolytine forest pests. Mites live very frequently in relationships with other invertebrates. Many are found in association with various species of bark beetles. Here, a total of 41 specimens of different bark beetles of the genus Ips (Ips acuminatus, Ips sexdentatus and Ips typographus) were studied for presence, species composition, and abundance of phoretic mites. The beetles were collected on dead wood and parts of tree bark of Pinus nigra, Pinus sylvestris and Picea abies in the Black Sea Mountains in Kastamonu and Artin Province of Turkey. A total of nine mite species were found, including Dendrolaelaps quadrisetus, Ereynetes sp., Histiostoma piceae, Paraleius cf. leontonychus, Pleuronectocelaeno barbara., Proctolaelaps hystricoides, Schizostethus simulatrix, Trichouropoda lamellosa and Uroobovellaipidis. All species are identified for the first time within Turkish fauna.

scholarly journals Level of relics in high-mountain flora of isolated Fisht-Oshten Massif and Chernomorskaya Chain

2019 ◽  
pp. 21-29
Author(s):  
I. N. Timukhin ◽  
B. S. Tuniyev
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
High Mountain ◽  
The West ◽  
The Caucasus ◽  
The Holocene ◽  
Alpine Species ◽  
High Level ◽  
First Time ◽  
Relic Species

For the first time the level of relics of the high-mountain flora of the northwestern edge of the highlands of the Caucasus has been established. The Fisht-Oshten Massif and the Black Sea Chain have a uniquely high level of relics - 51.0% (617 species), with a predominance of Tertiary-relic species - Rt - 41.2% (498 species). The second largest representation is a group of Holocene relics - Rx - 7.3% (88 species), the minimum represented Pleistocene relics - Rg - 2.5% (31 species). The relic level of alpine species is one of the highest in the Caucasus and is 52.8% (338 species). Alpine species also have predominance of Pliocene relics - 46.7% (299 species), the number of glacial relics is 2.5% (16 species), the share of xerothermic relics - 3.6% (23 species). In the preservation of relic species revealed general trends, depending on the remoteness of local flora from the main diaspora on the Fisht-Oshten Massif and the modern area of the meadow belt. These trends persist in Tertiary relics, while other patterns are observed for glacial and Holocene relics. The number of glacial relics fades to the west, most clearly it can be seen in alpine species. The number of Holocene relics as much as possible on the edge areas (Fisht-Oshten Massif and Mt. Semashkho) and minimally on the central peaks of the Black Sea Chain, where the Holocene expansion of xerophyte plants was insignificant.

scholarly journals The Black Sea Trout, Salmo labrax Pallas, 1814 (Pisces: Salmonidae) in Romanian Waters

2020 ◽  
Vol 77 (2) ◽  
pp. 9
Author(s):  
Călin LAȚIU ◽  
Daniel COCAN ◽  
Paul UIUIU ◽  
Andrada IHUȚ ◽  
Sabin Alexandru NICULA ◽  
...  
Keyword(s):  
Black Sea ◽  
The Black Sea ◽  
Danube Delta ◽  
Meristic Characters ◽  
Sea Trout ◽  
Research Fields ◽  
New Information ◽  
Rivers And Lakes ◽  
Recorded Data ◽  
New Hypothesis

The review assembles chronological data on Black Sea trout (Salmo labrax) from Romanian waters and brings up-to-date information related to the distribution of the species. The information used dates from 1909 to 2020 and includes books, articles, digital databases, field observations, and notes from different research fields such as ichthyology, biogeography, genetics, aquaculture, conservation, and ecology. Global distribution, migration, meristic characters, and aquaculture of the species were analyzed based on the recorded data from the specialty literature. New information related to a possible population of Salmo labrax inside the Carpathian Arch was discussed. In Romanian waters the species is found in the Black Sea, Danube, Danube Delta but the current paper proposes a new hypothesis, namely that resident populations can be found in rivers and lakes adjacent to the Carpathian Arch. The highest migration point of the Black Sea trout in the Danube was recorded near Corabia locality, Olt County, (43°46′25″N- 24°30′12″E). In the Danube Delta, it was caught in all the three branches (Sulina, Sf. Gheorghe and Chilia), and lagoonary complexes such as Razim-Sinoe. Sexually matured females were caught especially in Spring Season while unmatured specimens were caught in all seasons. Even if the species is protected under Romanian legislation, fishermen and anglers should report its presence when caught accidentally.

scholarly journals The fishes of the Bolaman Stream, Northern Turkey

2021 ◽  
Vol 4 (1) ◽  
pp. 38-54
Author(s):  
Serkan Saygun
Keyword(s):  
Black Sea ◽  
Fish Species ◽  
Fish Fauna ◽  
The Black Sea ◽  
Fish Samples ◽  
First Time ◽  
Squalius Cephalus

In this study, the fish species inhabiting the Bolaman Stream drains to the Black Sea from the Fatsa coast (Ordu Province, Turkey) was reported for the first time. The study was caught out non-periodically by sampling from seven stations in the Bolaman Stream between July 2017 and November 2018. Fish samples were captured with an electroshock device. With this study, it was determined that the fish fauna of the Bolaman Stream is represented by 10 species in five families (Acheilognothidae, Cyprinidae, Gobiidae, Leuciscidae, and Salmonidae). These species were as follows, respectively Rhodeus amarus, Barbus tauricus, Capoeta banarescui, Neogobius fluviatilis, Ponticola turani, Alburnus derjugini, Squalius cephalus, Vimba vimba, Alburnoides fasciatus, and Salmo coruhensis.

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