Studies of mezozooplankton in the Zmiinyi Island coastal waters in 2016-2017

Visnyk of V. N. Karazin Kharkiv National University series "Ecology" ◽

10.26565/1992-4259-2019-20-05 ◽

2019 ◽

Cited By ~ 1

Keyword(s):

Coastal Waters ◽

Structural Characteristics ◽

Taxonomic Composition ◽

The State ◽

The Black Sea ◽

Environment Quality ◽

Pelagic Larvae ◽

Species Dynamics ◽

Main Component ◽

Sea Fish

Purpose. To study the state of mezozooplankton in the Zmiinyi Island coastal waters in 2016-2017. Methods. Standard methods of mezozooplankton sampling, determination, number and biomass assessment. Results. Based on the data received, analysis of biodiversity and structural characteristics of mezozooplankton in the Zmiinyi Island coastal waters has been made. Taxonomic composition, number and biomass have been determined for each species; dynamics of number and biomass presented season by season. Marine environment quality assessment has been performed on the metrics of mezozooplankton. Conclusions. Altogether 32 taxa of 9 main mezozooplankton groups were identified in 2016-2017. It was shown that the dominating groups were Copepoda, Rotatoria, Protozoa, Cladocera and Harpacticoida. Shannon’s biodiversity index of mezozooplankton varied from 0.41 (20.06.2016) to 3.29 (24.07.2016) with average values 2.32 in 2016 and 1.64 in 2017. Mezozooplankton number and biomass varied in 2016-2017 within broad limits from 645 to 55829 ind/m³ and 1.385 to 2597.248 mg/m³ respectively (with average values 10129 ind/m³ and 154.82 mg/m³ in the period IV-XII, 2016 and 21563 ind/m³ and 466.30 mg/m³ in the period IV-VI, 2017). Water quality in the coastal waters of the Zmiinyi Island on the state of mezozooplankton was «Bad» in 18 cases out of 68 (26.4%) and was assessed in general as «Poor». On total mezozooplankton biomass the state was assessed as «Poor» and «Bad» (68.2%). «Good» (10.6%) and «High» (9.1%) quality was found in 19.7% of cases, which evidenced unsatisfactory state of mezozooplankton – the main component of food reserve for pelagic larvae and pelagic species of the Black Sea fish.

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Macrozoobenthos State in Odessa Bay Coastal Waters in 2016-2017

Man and Environment. Issues of Neoecology ◽

10.26565/1992-4224-2019-31-04 ◽

2019 ◽

Cited By ~ 1

Keyword(s):

Seasonal Variation ◽

Species Composition ◽

Coastal Waters ◽

Benthic Invertebrates ◽

Structural Characteristics ◽

Taxonomic Composition ◽

Summer Period ◽

Standard Methods ◽

Environment Quality ◽

Quantitative Indicators

Purpose. Study of macrozoobenthos contemporary state in Odessa Bay coastal waters in 2016-2017. Methods. Standard methods of macrozoobenthos sampling, determination, estimation of number and biomass Results. The results of macrozoobenthos biodiversity, structural characteristics and taxonomic composition in Odessa bay coastal waters have been presented. Seasonal dynamics of its number and biomass. has been studied. Assessment of marine environment quality has been performed on the metrics of macrozoobenthos. Conclusions. Altogether 121 taxa of benthic invertebrates were identified in Odessa Bay in 2016-2017. Taxonomic composition and quantitative indicators of macrozoobenthos had clear seasonal variation with maximal development of benthos in summer period. In spring of 2016, 75 taxa of macrozoobenthos were registered in samples, in summer – 82 taxa, in autumn – 60 taxa, in summer of 2017 – 62 taxa. The basis of macrozoobenthos community was formed be mollusks (Mollusca) with domination of species М. galloprovincialis, as well as representatives of Arthropoda and Annelida. Significant input into macrozoobenthos species composition was made by representatives of the following groups: Bryozoa, Nemertea and Platyhelminthes. Contribution of Porifera, Cnidaria and Ph%

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The Results of Zmiinyi Island (Black Sea) Coastal Waters Ichtiofauna Monitoring in 2016-2017

Visnyk of V. N. Karazin Kharkiv National University series "Ecology" ◽

10.26565/1992-4259-2020-23-08 ◽

2020 ◽

Keyword(s):

Black Sea ◽

Coming Out ◽

Coastal Waters ◽

Structural Characteristics ◽

The Black Sea ◽

Fish Stock ◽

Biomass Estimation ◽

Ecological Groups ◽

Biodiversity Indicators ◽

Island Area

Purpose. To study the state of ichthyofauna in the Zmiinyi Island coastal waters in 2016-2017. Methods. Standard methods of ichthyofauna sampling, determination, abundance and biomass estimation. Results. During the period of studies, 68 species of marine, brackish-water and freshwater fish were found in the Zmiinyi Island area belonging to 18 orders, 41 families and 55 genera. The biggest number of taxa belongs to Perciformes order. The representatives of this order make one-half of all the species found near the island. Indicators of ichthyofauna species diversity in the Zmiinyi Island area were gradually decreasing in the period from 2003 to 2009. In 2015-2016 all those indicators grew significantly. Biodiversity level (Shannon index values calculated coming out of number) in 2016 varied from 0.86 to 3.06 making in the average 2.06; in 2017 – from 2.40 to 2.54 making in the average 2.47. Minimal values of biodiversity indicators were registered in the end of autumn and in winter, maximal – in May-June. In the Zmiinyi Island coastal waters 30.9% of all the fishes registered in the Black Sea were found. The fishes caught near the island belonged to 5 ecological groups. The basis of ichthyofauna in the area was formed by marine fish species – 52 species (76.5 % of the total number of species). Most of species (54 species or 89.4%) were bottom-dwelling or near-bottom. Pelagophylic and protecting species prevailed and their numbers were almost equal (24 species or 35.3% and 23 species or 33.8% respectively). On the type of feeding, predatory (37%) and benthos-eating (33%) species prevailed. Out of 68 species found in the island area, 16 species are included into the Red Book of Ukraine, 22 species – into the Black Sea Red Data Book, 7 species – into the IUCN Red List. More than one-half of the species registered in the area (36 species or 52% of all the species) have a protected status. Сonclusions. Results of analysis of biodiversity, structural characteristics and taxonomic composition of ichthyofauna in the Zmiinyi Island coastal waters have been presented. Seasonal dynamics of its number and biomass has been studied. The results of the analysis of some aspects of ecology and biology of the main mass species of fish are presented. Recommendations are given to improve monitoring of the ichthyofauna of coastal waters. Quality of bottom communities monitoring in the Zmiinyi Island coastal waters can be increased significantly by development and implementation of non-contact low-budget video-monitoring methods to solve the problem of fish stock and biodiversity studying in inaccessible areas. It is anticipated that the method developed will help high precision assess of fish stock in inaccessible shelf areas where application of other methods is connected with technical difficulties, high cost and can lead to unreliable results. Elaboration of the method aimed at development of video materials received computer processing algorithms will significantly simplify the analysis of the data collected.

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Zmiinyi Island Coastal Zone Macrozoobenthos State in 2016-2017

Visnyk of V. N. Karazin Kharkiv National University series "Ecology" ◽

10.26565/1992-4259-2019-21-07 ◽

2019 ◽

Keyword(s):

Coastal Zone ◽

Marine Environment ◽

Structural Characteristics ◽

Taxonomic Composition ◽

The Black Sea ◽

Biomass Estimation ◽

Soft Substrate ◽

Rocky Substrate ◽

Red Data Book ◽

Data Book

Purpose. To study the state of macrozoobenthos in the Zmiinyi Island coastal zone in 2016-2017. Methods. Standard methods of macrozoobenthos sampling, determination, number and biomass estimation. Results. Results of analysis of biodiversity, structural characteristics and taxonomic composition of macrozoobenthos in the Zmiinyi Island coastal zone have been presented. Seasonal dynamics of its number and biomass has been studied. Assessment of marine environment quality has been performed based on the metrics of macrozoobenthos. Conclusions. Altogether, 132 taxa of benthic invertebrates belonging to 10 biggest taxonomic groups of macrozoobenthos have been identified in the Zmiinyi Island coastal zone in 2016-2017. Analysis of taxonomic composition identified 1 species of Porifera (0.8%), 7 taxa of Cnidaria (5.3%), 3 taxa of Platyhelminthes (2.3%), 1 taxon of Nemertea (0.8%), 3 taxa of Bryzoa (2.3%), 52 taxa of Annelida (39.4%), 25 taxa of Mollusca (18.9%), 35 taxa of Arthropoda (265%), 2 taxa of Echinodermata (1.4%) and 3 taxa of Chordata (2.3%). Out of 132 macrozoobenthos taxa 6 are enlisted in the Red Data Book of Ukraine and 8 – in the Black Sea Red Data Book. Macrozoobenthos number varied from 0.317х104 (27.11.2016) to 16.943х104 (19.08.2016) ind/m2 on soft substrate and from 2.683х104 (17.05.2016) to 30.725х104 (19.08.2016) ind/m2 on rocky substrate; biomass varied from 0.017 (17.05.2017) to 34.857 (19.08.2016) kg/m2 on soft substrate and from 1.531 (27.11.2016) to 46.147 (19.08.2016) kg/m2 on rocky substrate. Maximal development of benthos was registered in summer period. Quality of marine environment on the AMBI and M-AMBI indices was assessed as Good in 21 cases out of 23 and as Moderate in 2 cases 2 out of 23. Mean values of AMBI and M-AMBI indices for different seasons made respectively: May, 2016 – 2.56 and 0.59; August, 2016 – 1.86 and 0.69; November, 2016 – 1.70 and 0.71; June, 2017 – 1.87 and 0.75.

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ASSESSMENT OF THE ENVIRONMENTAL STATE OF THE BLACK SEA COASTAL WATERS BY BIOINDICATION METHODS

Water and Ecology ◽

10.23968/2305-3488.2020.25.3.22-31 ◽

2020 ◽

Vol 25 (3) ◽

pp. 22-31

Author(s):

Yu. I. Baeva ◽

◽

N. A. Chernykh ◽

Keyword(s):

Black Sea ◽

Coastal Waters ◽

Marine Ecosystem ◽

The State ◽

Biotic Index ◽

Local Source ◽

The Black Sea ◽

Biogenic Elements ◽

Taxonomic Structure ◽

Bioindication Methods

Introduction. Using bioindication methods, the authors assessed the environmental state of water at the place where the Hadzhiyska River flows into the Black Sea (Slanchev Bryag / Sunny Beach resort, Bulgaria). Methods. The studies were carried out in the summer seasons of 2017–2019 during sea water “blooming”. The quality of river water was assessed by the state of the community of zoobenthic organisms using the Trent biotic index originally developed by Woodiwiss and the Mayer index, and the state of the coastal marine ecosystem was assessed by the species composition of the Black Sea macroalgae. Results. The waters at the mouth of the Hadzhiyska River can be classified as “polluted” and represent the main local source of biogenic elements entering the coastal sea waters. In the marine macrophytobenthos, representatives of green, brown and red algae were identified, including two species listed in the Red Book of the Black Sea — Cystoseira barbata and Zostera marina. The authors noted a displacement of native species — representatives of Cystoseira and Zostera genera — due to an increase in the number of associated algae from Ceramium, Cladophora and Ulva genera, which confirms organic pollution and eutrophication in coastal waters. The taxonomic structure of the macrophytes allows for the conclusion that the environmental state of the marine ecosystem in the area is satisfactory. The authors also provide a rationale for the use of benthic organisms in the express diagnostics of water environment quality in resort areas.

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Mesozooplankton study in Odessa bay in 2016-2017

Visnyk of V. N. Karazin Kharkiv National University series "Ecology" ◽

10.26565/1992-4259-2018-19-04 ◽

2018 ◽

Keyword(s):

Vertical Distribution ◽

Marine Environment ◽

Coastal Waters ◽

Taxonomic Composition ◽

Spatial Inhomogeneity ◽

Mesozooplankton Community ◽

Environment Quality ◽

Current State ◽

The University ◽

Quality Assessments

Purpose. Study of the current state of mesozooplankton in Odessa Bay coastal waters, 2016-2017. Methods. Standard methods of sampling, determination of mesozooplankton species composition, number and biomass. Results. Mesozooplankton sampled every 10 days and monthly in the area of the University Hydrobiological Station has been studied, taxonomic composition, number and biomass of each species determined; the results have been analysed and presented. Mesozooplankton biodiversity indices have been assessed in the coastal waters. Seasonal changes in number and biomass of the main mesozooplankton groups have been studied. Two zooplankton sampling methods have been compared. Marine environment quality has been assessed using the metrics of mesozooplankton. Altogether 31 and 22 taxa belonging to 9 main mesozooplankton groups have been identified in 2016 and 2017 respectively. The dominant groups were Copepoda, Rotatoria, Protozoa, Cladocera and Harpacticoida. Mesozooplankton number and biomass in 2016-2017 varied within broad limits from 600 ind./m³ and 0.24 mg/m³ (10.03.2017) to 225920 ind./m³ (10.06.2017) and 5471.96 mg/m³ (29.06.2017). Significant differences in the values of mesozooplankton number and biomass were revealed through sampling at the stations with different depth, which can be explained by both spatial inhomogeneity and different vertical distribution of those characteristics due to the features of the vertical distribution of temperature and salinity with depth. It was established that in shallow areas sampling with Juday net was more effective and representative than sampling with modified Apstein net. Analysis of marine environmental quality assessments using three different metrics of mesozooplankton has shown that the method of quality assessment using biomass was the most representative. Conclusions. Marine environment quality was assessed mainly as «Bad» and «Very Bad» for 82% of samples, «Good» and «High» for 4%, «Moderate» for 14% of samples. The performed assessment proves unsatisfactory conditions for mesozooplankton community normal development and functioning in Odessa Bay coastal waters.

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Influence Of Quarantine Measures Against The New Coronavirus Infection Covid-19 On The State Of Black Sea Coastal Waters

GEOGRAPHY ENVIRONMENT SUSTAINABILITY ◽

10.24057/2071-9388-2021-089 ◽

2021 ◽

Vol 14 (4) ◽

pp. 199-204 ◽

Cited By ~ 1

Author(s):

Mikael S. Arakelov ◽

Dmitry A. Lipilin ◽

Alina V. Dolgova-Shkhalakhova

Keyword(s):

Black Sea ◽

Coastal Waters ◽

The State ◽

Fourth Quarter ◽

The Black Sea ◽

Anthropogenic Pressure ◽

The Third ◽

Coastal Sea ◽

Coronavirus Infection ◽

Proportional Decrease

The Black Sea is one of the main recreational facilities in Russia subject to a high annual anthropogenic stress. Anthropogenic activity led to high coastal sea waters pollution, eutrophy, and endangered the sea’s self-purification capabilities. The total quarantine introduced on the Black Sea coast of the Krasnodar territory associated with the new coronavirus infection COVID-19 pandemic led to a decrease in anthropogenic pressure on coastal ecosystems and provided a unique opportunity to trace the dynamics of the most important hydrochemical indicators of coastal waters in the Tuapse district. The study aimed to characterize the impact of quarantine measures against the coronavirus on the state of coastal waters in the eastern part of the Russian Black Sea. For this, we identified and characterized the hydrochemical indicators and determined the effect of quarantine measures on their dynamics. The study used the standardized methods. The results obtained showed that a decrease in the recreational stress led to a proportional decrease in the pollutants supply to coastal sea waters; with the recreational stress resumption the concentrations of mobile pollutants tended to increase; a proportional relationship was established between biochemical oxygen demand (BOD5 ) and the ammonium nitrogen (NH4+) concentration; the nitrates’ (NO3–) concentration, in the seawater did not depend on the recreational stress degree. In particular, a proportional increase in NH4+ concentration and BOD5 in seawater was detected: in the third quarter of 2019 the concentration of NH4+ and BOD5 amounted to 3.0 mg/dm3 and 8.5 mg/dm3 , and 3.8 mg/dm3 and 7.5 mg/dm3 in the fourth quarter, respectively; in the 2020 samples, a decrease in the NH4+ concentration to 0.8 mg/dm3 in the third and to 1.2 mg/dm3 in the fourth quarter led to a proportional decrease in BOD5 4.5 mg/dm3 and 3.9 mg/dm3 , respectively. Thus, it was shown that the quarantine measures were shown to have a positive effect on the processes of self-purification of coastal sea waters in recreational zones.

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