scholarly journals Cystoseira barbata and Codium vermilara communities in the coastal area of Dzharylgach National Nature Park (The Black Sea, Ukraine

Algologia ◽  
2019 ◽  
Vol 29 (2) ◽  
pp. 129-140
Author(s):  
S.S. Sadogurskaya ◽  
Keyword(s):  
Black Sea ◽  
Coastal Area ◽  
The Black Sea ◽  
Cystoseira Barbata ◽  
Nature Park

scholarly journals Evaluation of Total Phenolic Content in Relation to Antioxidant Activity of Brown Algae Cystoseira barbata from Black Sea

2019 ◽  
Vol 70 (7) ◽  
pp. 2684-2689
Author(s):  
Emin Cadar ◽  
Rodica Sirbu ◽  
Alef Ibram ◽  
Ana Maria Ionescu
Keyword(s):  
Antioxidant Activity ◽  
Benzoic Acid ◽  
Black Sea ◽  
Total Phenolic Content ◽  
Phenolic Content ◽  
Reducing Power ◽  
The Black Sea ◽  
Total Phenolic ◽  
Dpph Radical ◽  
Cystoseira Barbata

Seaweeds are widely used in the life science as source of compounds with diverse structural forms and biological activities, therefore, potential source of new antioxidant activity. The algae of the Black Sea have not been adequately explored for their potential as a source of bioactive substances. In this context, Brown algae Cystoseira barbata isolated from Black Sea coastal waters of Romania, were evaluated for their bioactivity potential. The results from Cystoseira barbata were obtained: for total phenolic content obtained in ethanolic extracts (TPC): 385.6 � 1.85 mg GAE/100 g f.w. Phenolic Acids quantified by HPLC-DAD from hydroethanolic extract of Cystoseira barbata from Black Sea was 80.14% from total phenolic content identified. We showed that Cystoseira barbata from the Romanian shore of the Black Sea contains vanillic acid in highest quantity (99.5�0.08 mg/100 g f.w.), followed by benzoic acid (65.7�0.06 mg/100 g f.w.) and feluric acid (54.5�0.01 mg/100 g f.w.). The smallest quantities were for gallic acid (3.5�0.03 mg/100 g f.w.), pyrogallol acid (4.2�0.05 mg/100 g f.w.) and 4-amino-benzoic acid (5.2�0.09 mg/100 g f.w.). Cystoseira barbata has a total content of large phenols and also has strong antioxidant and antimicrobial activity. Antioxidant activity (ACL) was studied using DPPH radical scavenging activity and reducing power. The extracts containing high levels of total phenolic content were also potent DPPH radical scavengers. The IC50 (�g/mL) for Cystoseira barbata in methanolic extract was 942.92� 2.56 �g/mL. High absorbance obtained from reducing power assay indicates high reducing power, measured values of absorbance varied from 0.0901 at 0.9223.

scholarly journals The Investigation of Sinop Coastal Area Pattern in Terms of Coastal Management

2017 ◽  
Vol 6 (2) ◽  
pp. 85
Author(s):  
Oylum Gokkurt Baki ◽  
Osman Nuri Ergun
Keyword(s):  
Land Use ◽  
Black Sea ◽  
Coastal Management ◽  
Coastal Area ◽  
Coastal Areas ◽  
The Black Sea ◽  
Black Sea Region ◽  
Coastal Land Use ◽  
The City ◽  
Coastal Land

Sinop is a province located at the Black Sea region and it is rich in scenic beauty and cultural values and has potential touristic resources. Moreover, it is one of the most prominent port towns in the Black Sea region. The area, which can be qualified as the most important and prominent image region of the city, comprise the coastal land use line of the province. However, the city fails to utilize this advantage. The master plan of the city has substantially changed through the years. The present study aimed to determine the changes in the master plans of the city through the years, the distribution of the coastal land use areas and changes in the utilization of the coastal areas through the years. Evaluating the current administrative competence/constraints in the coastal area with respect to the data obtained in the study is also among the goals of the study. Furthermore, by taking the impact of environmental factors on the ratio of the land use areas into consideration, examining these data in terms of coastal management planning to create habitats that better suit the vital requirements is another prospect of the study. In addition, the evaluation of some coastal area-associated issues including the extent of the effect of current erosion issues on the development of the coastal area was also included in the study. The percentage of the current functional coastal areas in the province, the distribution of the number of building floors and the changes in these data by years were also investigated. For these evaluations, zoning revisions and 1/2000, 1/5000 and 1/10000 maps were examined to determine the coastal area zoning changes and filling areas. Fieldworks were carried out in the coastal area of the city to determine and observe the state of the area. The data was collected by contacting relevant institutions and organizations and carrying out fieldworks. Considering the data obtained in the study, measures to remedy the zoning deficiencies in the coastal area and the city center were proposed. The obtained data and evaluations obtained revealed that the province is in need of new and sustainable planning and there is a necessity to include implementations that are based on integrated coastal area management principals.

Heavy metal assessment in algae, sediments and water from the Bulgarian Black Sea coast

1999 ◽  
Vol 39 (8) ◽  
pp. 207-212 ◽  
Author(s):  
A. Jordanova ◽  
A. Strezov ◽  
M. Ayranov ◽  
N. Petkov ◽  
T. Stoilova
Keyword(s):  
Heavy Metal ◽  
Coastal Zone ◽  
Black Sea ◽  
Correlation Coefficients ◽  
The Black Sea ◽  
Enteromorpha Intestinalis ◽  
Lead And Cadmium ◽  
Cystoseira Barbata ◽  
Black Sea Coast ◽  
Sea Coast

The aim of our investigation is a survey of heavy metal pollution in algae, sediments and water from the Bulgarian Black Sea coast and determination of algae species appropriate as bioindicators. The levels of iron, copper, manganese, zinc, lead and cadmium are determined in water, sediments and eight species of macroalgae: (four green: Cladofora laetevirens, Ulva rigida, Enteromorpha intestinalis and Bryopsis plumosa; two brown: Cystoseira crinita and Cystoseira barbata; and two red: Ceramium rubrum and Corallina mediterranium), widely distributed in the Bulgarian coastal zone, and dominant in the Black Sea. The studied area is the littoral coastal zone from four locations - Tuzlata, Ravda, Ahtopol and Sinemoretz. No significant variations between metal concentrations in algae samples are obtained, while for sediments and water there are significant differences between location and season. The Cladofora laetevirens and Ceramium rubrum species show the highest metal content while Cystoseira crinita and Cystoseira barbata show the lowest level. The correlation coefficients and concentration factors of the elements are calculated.

scholarly journals Extraction and Characterization of Alginate from an Edible Brown Seaweed (Cystoseira barbata) Harvested in the Romanian Black Sea

Marine Drugs ◽  
2019 ◽  
Vol 17 (7) ◽  
pp. 405 ◽  
Author(s):  
Trica ◽  
Delattre ◽  
Gros ◽  
Ursu ◽  
Dobre ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Black Sea ◽  
Brown Seaweed ◽  
Structural Data ◽  
Alginate Beads ◽  
The Black Sea ◽  
Cystoseira Barbata ◽  
Sea Area ◽  
G Ratio

Cystoseira barbata is an edible brown seaweed, traditionally used in the Black Sea area as functional food. Both alginate and brown seaweed biomass are well known for their potential use as adsorbents for heavy metals. Alginate was extracted from C. barbata recovered from the Romanian coast on the Black Sea with a yield of 19 ± 1.5% (w/w). The structural data for the polysaccharide was obtained by HPSEC-MALS, 1H-NMR. The M/G ratio was determined to be 0.64 with a molecular weight of 126.6 kDa with an intrinsic viscosity of 406.2 mL/g. Alginate beads were used and their adsorption capacity with respect to Pb2+ and Cu2+ ions was determined. The adsorption kinetics of C. barbata dry biomass was evaluated and it was shown to have an adsorption capacity of 279.2 ± 7.5 mg/g with respect to Pb2+, and 69.3 ± 2 with respect to Cu2+. Alginate in the form of beads adsorbs a maximum of 454 ± 4.7 mg/g of Pb2+ ions and 107.3 ± 1.7 mg/g of Cu2+ ions.

Changes in chemical parameters in the Bulgarian Black Sea coastal area as an indication of the ecological state of the environment

1999 ◽  
Vol 39 (8) ◽  
pp. 37-45 ◽  
Author(s):  
G. Shtereva ◽  
S. Moncheva ◽  
V. Doncheva ◽  
O. Christova ◽  
I. Shterev
Keyword(s):  
Black Sea ◽  
Coastal Area ◽  
Phytoplankton Biomass ◽  
Positive Sign ◽  
The Black Sea ◽  
Ecological State ◽  
Chemical Parameters ◽  
Phytoplankton Communities ◽  
High Level ◽  
State Of The Environment

In the present paper the main trends in the principal chemical parameters and the phytoplankton communities in the close coastal area are discussed, aimed at evaluating the present ecological state of the environment and water quality in comparison with historical data. The results reveal a decrease in the content of PO4 and Si, while there is no apparent trend in the N-NO3 variability. In seasonal terms a change in the minima and maxima of some parameters is evident, and a seasonal dynamic closer to the natural annual cycle in the Black Sea. A decrease in the average annual phytoplankton biomass is established, especially pronounced during the summer period. The results suggest a positive sign of evolution of the environmental characteristics of the coastal zone, which should be treated rather tentatively due to the still high level of nutrients and the capacity of the ecosystem to produce and maintain high phytoplankton biomass.

scholarly journals Elemental accumulation in the black sea brown algae cystoseira studied by neutron activation analysis

2014 ◽  
Vol 21 (1) ◽  
pp. 9-23 ◽  
Author(s):  
Alexandra Kravtsova ◽  
Nataliya Milchakova ◽  
Marina Frontasyeva
Keyword(s):  
Neutron Activation Analysis ◽  
Activation Analysis ◽  
Neutron Activation ◽  
Black Sea ◽  
Coastal Waters ◽  
Brown Algae ◽  
The Black Sea ◽  
Cystoseira Barbata ◽  
Elemental Accumulation ◽  
First Time

Abstract For the first time the concentration of 26 macro- and microelements (Na, Mg, Al, Cl, K, Ca, Sc, V, Mn, Fe, Co, Ni, Zn, As, Br, Rb, Sr, Sb, I, Cs, Ba, Sm, Nd, Ag, Au, and U) in the thalli of brown algae Cystoseira barbata C. Ag. and Cystoseira crinita (Desf.) Bory was determined by instrumental neutron activation analysis (INAA), Sevastopol region, south-western Crimea, the Black Sea. The observed peculiarities of the elemental accumulation showed that Cystoseira spp. can be used as a biomonitor of coastal waters pollution in the study area.

scholarly journals Short-term variation of metazoan microzooplankton in a coastal area of the Black Sea: the regularities and determining factors

2017 ◽  
Vol 2 (1) ◽  
pp. 56-65
Author(s):  
S. A. Seryogin ◽  
E. V. Popova
Keyword(s):  
Species Diversity ◽  
Black Sea ◽  
Coastal Area ◽  
Diversity Index ◽  
Seawater Temperature ◽  
The Black Sea ◽  
Short Term ◽  
Species Diversity Index ◽  
Oikopleura Dioica ◽  
Oithona Davisae

To many fishes, including commercially valuable species, metazoan microzooplankton (MMZP) are the essential prey ensuring survival of their larvae and juveniles. For the Black Sea dependence of the variability of MMZP abundance and structure on hydroclimatic factors (seawater temperature, wind force and direction, etc.) in the coastal area was not earlier studied over as short periods of time as days to weeks; hence this investigation is of high relevance. Samples of MMZP were collected daily in the mouth of Sevastopol Bay and the adjoining open-sea area from 13 May to 21 June 2013, the period when the quantity of MMZP began growing (spring-summer increase). The samples were taken from the sea surface by a 10 l plastic sampler, condensed in the laboratory by reverse filtration and processed in a Bogorov chamber under the microscope MBS-9. Increased crustacean fraction in which copepods dominated suggested growing abundance of the zooplankton with warming of the sea. This main, temperature-dependent, trend was modulated by short-term changes in the force and direction of wind launching quantitative and qualitative re-distribution of MMZP in the surface layer. Different behavioral responses the plankters showed to the wind-induced water turbulence can be a part of the re-distribution machinery. Contributors to the species diversity were largely the naupliar and early copepodid stages of genera Acartia, Oithona, Paracalanus, Centropages, the nauplii and copepodites of Harpacticoida, bivalve and gastropod veligers, larvae of the tunicate Oikopleura dioica, the nauplii of barnacles, and the larvae of polychaetes. The zooplankton assemblage structure changed in two phases: one, with moderately high values of species diversity index, was prior to, and the other, with low estimates, during the outbreak of the invasive copepod Oithona davisae. 

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