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  • 1
    Online Resource
    Online Resource
    The Role of Planktonic Algae in the Ecological Assessment of Storage-Reservoirs of the ILI-Balkhash Basin
    Walter de Gruyter GmbH ; 2018
    In:  Transylvanian Review of Systematical and Ecological Research Vol. 20, No. 2 ( 2018-2-1), p. 1-14
    Details
    In: Transylvanian Review of Systematical and Ecological Research, Walter de Gruyter GmbH, Vol. 20, No. 2 ( 2018-2-1), p. 1-14
    Abstract: The largest wastewater treatment systems include Sorbulak and Kurty reservoirs, and the small storage ponds were studied in the summer of 2017 and characterized mainly by organic pollution. Phytoplankton communities were represented by species tolerant of organic and toxic pollution. Cyanobacteria dominated in the reservoirs, and dinophyte algae were only in the Kurty Reservoir. According to the results of CCA analysis, only Cr and certain nutrients had a significant effect on the abundance of algae. A statistically positive significant association between the Shannon index and the average algal cell mass was established. The results obtained are a particular example reflecting the non-linearity of changes in plankton communities in the gradient of nutrient loading and eutrophication of aquatic ecosystems.
    Type of Medium: Online Resource
    ISSN: 2344-3219
    URL: Article
    DOI: 10.2478/trser-2018-0008
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2628169-7
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  • 2
    Online Resource
    Online Resource
    Planktonic Invertebrates in the Assessment of Long-Term Change in Water Quality of the Sorbulak Wastewater Disposal System (Kazakhstan)
    MDPI AG ; 2020
    In:  Water Vol. 12, No. 12 ( 2020-12-04), p. 3409-
    Details
    In: Water, MDPI AG, Vol. 12, No. 12 ( 2020-12-04), p. 3409-
    Abstract: The multicomponent composition of wastewater makes it challenging to assess its quality objectively, but the last one is a prerequisite for the safe re-use of wastewater. The solution to this problem should be aimed at finding criteria that make it possible to increase the objectivity of assessing the water quality of reservoirs with multicomponent pollution. This work analyzes the water quality of the Sorbulak wastewater disposal system in the summer of 2017, based on chemical variables and zooplankton structure and assess the long-term changes in the water quality of Sorbulak. According to the Kruskal–Wallis test, in 2017, the differences between the studied water bodies in the content of nutrients and heavy metals were mostly insignificant. From 2000–2002 to 2017, nitrate, nitrite nitrogen, and heavy metals in Sorbulak significantly decreased. Zooplankton communities consisted of a relatively small number of eurybiontic species resistant to environmental factors. The variability of the quantitative variables of zooplankton was associated with the nutrients. Males dominated the population of the cyclopoid copepods Acanthocyclops trajani. In 2000–2002 individuals with morphological anomalies were found in cyclopoid copepods populations, but were absent in 2017. The appearance of individuals with morphological anomalies was associated with copper or lead. The chemical data and structure of zooplankton communities indicated that the toxic pollution of Sorbulak decreased by 2017 compared to 2000–2002. Our results demonstrate that the structural variables of zooplankton communities could be successfully used to assess the water quality of water bodies with mixed pollution. We recommend using not only the traditional set of biological variables (abundance, biomass, diversity indices, and the average mass of an individual), but also data on the structure of species dominance, the sex structure of copepod populations, and the presence of individuals with morphological anomalies for monitoring of water bodies with mixed pollution.
    Type of Medium: Online Resource
    ISSN: 2073-4441
    URL: Article
    DOI: 10.3390/w12123409
    Language: English
    Publisher: MDPI AG
    Publication Date: 2020
    detail.hit.zdb_id: 2521238-2
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  • 3
    Online Resource
    Online Resource
    Ecological Mapping in Assessing the Impact of Environmental Factors on the Aquatic Ecosystem of the Arys River Basin, South Kazakhstan
    MDPI AG ; 2019
    In:  Diversity Vol. 11, No. 12 ( 2019-12-12), p. 239-
    Details
    In: Diversity, MDPI AG, Vol. 11, No. 12 ( 2019-12-12), p. 239-
    Abstract: Assessment of the water quality of the Arys River basin based on the spatial distribution of richness of phytoperiphyton communities and abiotic variables was given for the first time. Altogether, 82 species were revealed in phytoperiphyton, including Bacillariophyta of 51, Cyanobacteria of 20, Chlorophyta of 7, and Charophyta of 4. Cluster analysis revealed the uniqueness of the composition of periphyton communities related to the abiotic conditions. The environmental preferences of the algae indicated fresh organic pollution in the lower reaches of the Arys River and weak or moderate levels of organic pollution in the rest of the basin. The ecological mapping of chemical data generally confirmed this conclusion. According to the maps, the highest water quality was revealed in the upper stream of the basin. The middle part of the river basin had the lowest water quality in terms of transparency, nitrite-nitrogen, and nitrate-nitrogen. The downstream of the Arys was characterized by a secondary deterioration in water quality according to the Aquatic Ecosystem State Index (WESI) index. We revealed the complicated interaction between natural and anthropogenic factors that caused changes in water quality in the Arys River basin.
    Type of Medium: Online Resource
    ISSN: 1424-2818
    URL: Article
    DOI: 10.3390/d11120239
    Language: English
    Publisher: MDPI AG
    Publication Date: 2019
    detail.hit.zdb_id: 2518137-3
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  • 4
    Online Resource
    Online Resource
    Assessment of River-Sea Interaction in the Danube Nearshore Area (Ukraine) by Bioindicators and Statistical Mapping
    MDPI AG ; 2021
    In:  Land Vol. 10, No. 3 ( 2021-03-18), p. 310-
    Details
    In: Land, MDPI AG, Vol. 10, No. 3 ( 2021-03-18), p. 310-
    Abstract: There is a lack of understanding of the main drivers that form the picture of biological communities of transitional waters in deltaic ecosystems under the influence of terrestrial sources. Analysis of hydrochemical parameters in relation to phytoplankton communities in the Ukrainian part of the Danube coastal zone (in August 2018) is the focus of current work. The goal was to identify patterns in the distribution of environmental parameters (salinity and nutrients) in the area of the shipping channel through the Bystry arm, as well as to assess the state of water quality. The ecological bioindicators approach using modern statistical methods, and ecological mapping shows sufficient achievements in interpreting the results. The indicators of salinity (mesohalobes) had better describe the character of the transportation of fresh riverine waters than salinity gradient. The composition of 35 indicator phytoplankton species corresponds to 3 and 4 water quality classes in the coastal zone. High N:P ratios showed an imbalance in the ecosystem as an indicator of production and destruction processes. Statistical maps of the indicator species distribution revealed the river current’s influence on the nearshore water mass. Ecological maps of surface and bottom variables show various environmental impacts resulting from dredging in the shipping channel and excavated soil dumping. Canonical correspondence analysis (CCA) and statistical maps revealed two pools of factors with oppositely directed effects on phytoplankton: salinity, on one hand, and nutrients, on the other. Miozoa and Chlorophyta have an opposite interaction with salinity and oxygen and can be ecosystem change indicators in further analysis
    Type of Medium: Online Resource
    ISSN: 2073-445X
    URL: Article
    DOI: 10.3390/land10030310
    Language: English
    Publisher: MDPI AG
    Publication Date: 2021
    detail.hit.zdb_id: 2682955-1
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  • 5
    Online Resource
    Online Resource
    Diversity and seasonal variation of phytoplankton community in the Santragachi Lake, West Bengal, India
    Hamad bin Khalifa University Press (HBKU Press) ; 2012
    In:  QScience Connect Vol. 2012, No. 1 ( 2012-01-27)
    Details
    In: QScience Connect, Hamad bin Khalifa University Press (HBKU Press), Vol. 2012, No. 1 ( 2012-01-27)
    Abstract: The study of phytoplankton diversity and its seasonal variation was carried out by sampling water taken from the Santragachi Lake, of West Bengal between November 2009 and July 2010. Various physico-chemical variables were recorded and the correlation of this with phytoplankton density was established using Canonical Correspondence Analysis. This showed that the density of phytoplankton was higher when temperature and nutrients were increased. A total of 29 phytoplankton taxa belonging to Chlorophyta (10), Cyanobacteria (8), Charophyta (5), Bacillariophyta (4), and Euglenozoa (2) were recorded from nine samples taken within the study period. Chlorophyta species dominated mostly in variety and percentage composition while Euglenozoa species representatives had the least expression. Bio-indication showed a low diverse community in the monsoon period with better water quality than in pre- and post-monsoon seasons. Various diversity indices (Shannon–Wiener diversity index, Gleason species richness index, Pielou evenness index, and Naughton dominance index) were used to establish the seasonal variation of phytoplankton. The Shannon–Wiener diversity index was most useful in indicating the trophic status of the water as well as the pollution status, which in this case, depicted a moderate level of pollution of this lake.
    Type of Medium: Online Resource
    ISSN: 2223-506X
    URL: Article
    DOI: 10.5339/connect.2012.3
    Language: English
    Publisher: Hamad bin Khalifa University Press (HBKU Press)
    Publication Date: 2012
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  • 6
    Online Resource
    Online Resource
    Comparative analysis of algal biodiversity in the rivers of Israel
    Walter de Gruyter GmbH ; 2011
    In:  Open Life Sciences Vol. 6, No. 2 ( 2011-4-1), p. 246-259
    Details
    In: Open Life Sciences, Walter de Gruyter GmbH, Vol. 6, No. 2 ( 2011-4-1), p. 246-259
    Abstract: Comparative analysis of algal communities in the rivers of Israel was completed to highlight the influence of environmental variables on biodiversity. The study revealed that 671 species of algae and cyanobacteria belonging to nine taxonomic divisions were present during 2002–2009 in the Yarqon, Alexander, Hadera, Qishon, Oren, Lower and Upper Jordan, and Zin rivers. The species richness of each river was evaluated by taxonomic structural comparison, geobotanical, hierarchical cluster analysis, and the degree of relatedness for different levels of taxonomic resolution. The analysis revealed close similarity of the Upper Jordan and Oren rivers. The average taxonomic distinctness index showed that the Yarqon, Oren, Upper Jordan, and Qishon communities were partly degraded due to permanent environmental disturbances. The variation in taxonomic distinctness index showed that the Alexander, Yarqon and Hadera communities were formed not only due to anthropogenic factors but also through long-term climatic impact. The most abundant indicator species inhabit low streaming and standing alkaline waters of medium salinity and low to medium organic pollution. The statistical approaches allowed discrimination between climatic and anthropogenic factors that impact upon the riverine biodiversity in semi-arid environments. Analysis shows the influence of anthropogenic factors was strongly modulated by climatic impacts causing a marked decease of species richness from north to south.
    Type of Medium: Online Resource
    ISSN: 2391-5412
    URL: Article
    DOI: 10.2478/s11535-010-0108-z
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2011
    detail.hit.zdb_id: 2817958-4
    SSG: 12
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  • 7
    Online Resource
    Online Resource
    Morphological peculiarities productive shoots and pollinators of 〈i〉Astilbe chinensis〈/i〉
    Petrozavodsk State University ; 2016
    In:  HORTUS BOTANICUS Vol. 11, No. 11 ( 2016-01), p. 172-183
    Details
    In: HORTUS BOTANICUS, Petrozavodsk State University, Vol. 11, No. 11 ( 2016-01), p. 172-183
    Type of Medium: Online Resource
    ISSN: 1994-3849
    Uniform Title: Морфологические особенности репродуктивных побегов и опылители 〈i〉Astilbe chinensis〈/i〉
    URL: Issue
    URL: Journal
    URL: Article
    DOI: 10.15393/j4.issue.2016.5981
    DOI: 10.15393/j4.journal
    DOI: 10.15393/j4.art.2016.3282
    Language: English , Russian
    Publisher: Petrozavodsk State University
    Publication Date: 2016
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  • 8
    Online Resource
    Online Resource
    Phytoplankton in the Ecological Assessment of the Mining Facilities Influence on the Anabar River in the Permafrost Zone of the Arctic, Eastern Siberia, Russia
    MDPI AG ; 2023
    In:  Land Vol. 12, No. 9 ( 2023-09-13), p. 1775-
    Details
    In: Land, MDPI AG, Vol. 12, No. 9 ( 2023-09-13), p. 1775-
    Abstract: In modern conditions of climate change and increased anthropogenic pressure on aquatic ecosystems, the study of the diversity of organisms in the Arctic has become a top priority. Our study continues a series of studies on the biodiversity of Arctic rivers. Using innovative methods, such as ecological mapping, statistics, and bioindication, we identify environmental factors that influence phytoplankton diversity in the river basin under study. For the Anabar Arctic River, an increase in the diversity of phytoplankton was found to the north towards the mouth of the river, which is associated with an increase in turbidity from industrial discharges. A weak effect of organic pollution and toxic effects associated with existing settlements have been identified, but it has been established that natural processes of self-purification take place in the studied Arctic River. Among 210 species of phytoplankton, an increase in the diversity of chrysophytes in the northern direction was revealed, consistent with the intensification of severe Arctic climatic conditions. Since the study region is characterized by increased diamond mining, we recommend continuing to monitor phytoplankton, track changes in the Anabar River ecosystem, and expand such observations to other Arctic rivers.
    Type of Medium: Online Resource
    ISSN: 2073-445X
    URL: Article
    DOI: 10.3390/land12091775
    Language: English
    Publisher: MDPI AG
    Publication Date: 2023
    detail.hit.zdb_id: 2682955-1
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  • 9
    Online Resource
    Online Resource
    Statistical mapping and 3-D surface plots in phytoplankton analysis of the Balkhash Lake (Kazakhstan)
    Walter de Gruyter GmbH ; 2018
    In:  Transylvanian Review of Systematical and Ecological Research Vol. 20, No. 1 ( 2018-1-1), p. 1-16
    Details
    In: Transylvanian Review of Systematical and Ecological Research, Walter de Gruyter GmbH, Vol. 20, No. 1 ( 2018-1-1), p. 1-16
    Abstract: Phytoplankton of the Balkhash Lake was represented by 91 species with average abundance of 1,002.4 mln. ind. m −3 and average biomass of 0.853 g m −3 in summer 2004. Maps of spatial distribution revealed that phytoplankton abundance was confined within the near-estuary sections of the rivers. Correlation analysis and 3D Surface Plots showed that the average mass of the algal cell decreased with increased phytoplankton abundance, species richness, and Shannon Bi index values. Synchronicity of the spatial dynamics of W-Clarke and Δ-Shannon values evidenced the possibility of obtaining information on the structure of communities by both calculated and graphical methods.
    Type of Medium: Online Resource
    ISSN: 2344-3219
    URL: Article
    DOI: 10.1515/trser-2018-0001
    Language: English
    Publisher: Walter de Gruyter GmbH
    Publication Date: 2018
    detail.hit.zdb_id: 2628169-7
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  • 10
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    Online Resource
    Role of Altitude in Formation of Diatom Diversity of High Mountain Protected Glacier Lakes in the Kaçkar Mountains National Park, Rize, Turkey
    MDPI AG ; 2022
    In:  Environments Vol. 9, No. 10 ( 2022-10-05), p. 127-
    Details
    In: Environments, MDPI AG, Vol. 9, No. 10 ( 2022-10-05), p. 127-
    Abstract: The benthic diatom assemblages of the glacier Avusor Great Lake and Koçdüzü Great Lake were investigated in August 2019. A total of 71 diatom species belonging to 34 genera were determined in the samples, 49 species from Avusor Great Lake and 37 from Koçdüzü Great Lake. Only 15 diatom species were common to both lakes. Total floristic similarity between the neighbouring lakes was only 21.12%. Genera with the highest number of species were Eunotia (8), Gomphonema (6), Pinnularia (6), Navicula (5) and Aulacoseira (4). The diatom flora of both lakes was formed by cosmopolitan species with a large influence from species in alpine and subalpine area. A comparison of the diatom assemblages of the investigated lakes showed differences in both relative abundance and species present in the individual lakes. Bioindicative analysis showed that the water of Koçdüzü Great Lake is more alkaline and less saturated with organic substances than Avusor Great Lake. In both lakes, the communities are composed of species adapted to living in the benthos of fresh waters of moderate temperature well enriched with oxygen. In both lakes, the water quality was Class 2 with a saprobity index of S = 1.08 in Avusor Great Lake and 0.97 in Koçdüzü Great Lake, but their communities were composed of species with both oligotrophic and mesotrophic status. Statistical comparison of the species composition of studied lakes with other high mountain lakes and the lakes in northern Turkey revealed the role of altitude as the main factor in the formation of diatom floras.
    Type of Medium: Online Resource
    ISSN: 2076-3298
    URL: Article
    DOI: 10.3390/environments9100127
    Language: English
    Publisher: MDPI AG
    Publication Date: 2022
    detail.hit.zdb_id: 2777960-9
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