scholarly journals PRODUCTIVITY OF SOME LAKES OF THE KOSH-AGACH DISTRICT OF THE REPUBLIC OF ALTAI

2020 ◽  
pp. 94-101
Author(s):  
L. V. Vesnina ◽  
T. O. Ronzhina ◽  
N. V. Zelentsov ◽  
G. A. Romanenko ◽  
I. Yu. Teryaeva ◽  
...  
Keyword(s):  
Aquatic Vegetation ◽  
Water Area ◽  
Lake Basin ◽  
Dominant Group ◽  
Chironomid Larvae ◽  
Caddis Flies ◽  
Higher Aquatic Vegetation ◽  
Field Season ◽  
Large Length ◽  
The Republic

The Republic of Altai has a large length of watercourses and significant areas of lakes of fishery importance. The collection of materials was carried out in the field season of 2018 on the lakes: Uch-Kol (Three Lakes), Kamyshevoye and Lake without a name, located within the borders of Kosh-Agach district of the Altai Republic. Research has covered the entire water area. In the course of the research it was noted that Lake Uch-Kol consists of three successive basins with a total area of 7.9 hectares. The upper lake basin has an area of 5.5 hectares. The average lake basin has an area of 1.8 hectares. The lower lake basin has an area of 0.6 ha. Higher aquatic vegetation in the pond is missing. Lake zooplankton is represented by one species of Cladocera and two species of Copepoda. Lake Zoobenthos Uch-Kol is represented by a representative of the r. Gammarus. The area of Kamyshevoye Lake is 7.4 ha. The pond has a slightly elongated shape from west to east. In the zooplankton of the reservoir of mass development, branchy and rotifers reach. Chironomid larvae and caddisfruits dominate in the structure of zoobenthos. The area of the lake without a name is 29.4 hectares. The reservoir has a form elongated from the northeast to the southwest. In terms of numbers and biomass, Copepoda copepads are the dominant group in zooplankton. The dominant position in the zoobenthos composition is occupied by caddis flies and gammarids. All studied water bodies have low biological productivity. Phytoplankton is represented mainly by diatoms and green algae. The ichthyological fauna of Lake Uch-Kol and Lake Kamyshevoye is represented by an oligoid type of ichthyocenosis. The ichthyological fauna in the Lake without a name is missing.

Vegetation of Salavat town (Bashkortostan Republic). I. The higher aquatic vegetation (classes Lemnetea and Potametea)

2011 ◽  
pp. 55-70 ◽  
Author(s):  
Ya. M. Golovanov ◽  
S. S. Petrov ◽  
L. M. Abramova
Keyword(s):  
Plant Communities ◽  
Aquatic Plant ◽  
Aquatic Vegetation ◽  
Sewage Disposal ◽  
The Third ◽  
Higher Aquatic Vegetation ◽  
The Republic

The results of a syntaxonomical study (by Braun-Blanquet method) of higher aquatic plant communities of Salavat town (Bashkortostan Republic), the third city in the republic with population approximately of 150 000 people, are presented. The diversity of communities of aquatic vegetation has been classified. They belong to 2 classes (Lemnetea, Potametea), 3 orders (Lemnetalia, Hydrocharitetalia and Potametalia), 4 alliances (Lemnion minoris, Hydrocharition morsus-ranae, Potamion pectinati and Nymphaeion albae), 14 associations and 10 variants. An expansion of the communities belong to associations Elodeetum canadensis, Najadetum marinae in the Belaya river was noticed. It indicates the intensification of sewage disposal to the river.

Vegetation of sandy coasts of Lake Baikal

2016 ◽  
pp. 46-66
Author(s):  
Тю Фю Dulepova
Keyword(s):  
Lake Baikal ◽  
Lake Basin ◽  
Floristic Diversity ◽  
Southern Siberia ◽  
Irkutsk Region ◽  
Relief Formation ◽  
The Republic ◽  
River Valleys ◽  
High Degree ◽  
Semiarid Conditions

The aeolian processes play an important role in the relief formation under the semiarid conditions of the intermountain basins of Southern Siberia. Ancient sand landforms occur in different regions of Siberia — the Ob, Chuya, Аley, Yenisei, Аngara, Selenga, Chikoy, Khilok and Chara river valleys and Lake Baikal coasts. The sandy coasts of Lake Baikal are of great interest in terms of floristic diversity determined by a high degree of endemism. Despite centuries of study of the lake basin, sand vegetation is poorly described in the literature. This study presents an analysis of 184 relevés of psammophytic vegetation from the Republic of Buryatia (Severobaikalsky, Barguzinsky, Pribaikalsky districts) and Irkutsk region (Olkhon Island) obtained in 2009–2014.

scholarly journals Effects of Macrofaunal Recolonization on Biogeochemical Processes and Microbiota—A Mesocosm Study

Water ◽  
2021 ◽  
Vol 13 (11) ◽  
pp. 1599
Author(s):  
Annika Fiskal ◽  
Aixala Gaillard ◽  
Sebastien Giroud ◽  
Dejan Malcic ◽  
Prachi Joshi ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Bottom Water ◽  
Surface Sediments ◽  
Sediment Cores ◽  
Lake Basin ◽  
Sediment Properties ◽  
Chironomid Larvae ◽  
Sediment Reworking ◽  
Mesocosm Experiments ◽  
Tubificid Worms

Macroinvertebrates are widespread in lake sediments and alter sedimentary properties through their activity (bioturbation). Understanding the interactions between bioturbation and sediment properties is important given that lakes are important sinks and sources of carbon and nutrients. We studied the biogeochemical impact of macrofauna on surface sediments in 3-month-long mesocosm experiments conducted using sediment cores from a hypoxic, macrofauna-free lake basin. Experimental units consisted of hypoxic controls, oxic treatments, and oxic treatments that were experimentally colonized with chironomid larvae or tubificid worms. Overall, the presence of O2 in bottom water had the strongest geochemical effect and led to oxidation of sediments down to 2 cm depth. Relative to macrofauna-free oxic treatments, chironomid larvae increased sediment pore water concentrations of nitrate and sulfate and lowered porewater concentrations of reduced metals (Fe2+, Mn2+), presumably by burrow ventilation, whereas tubificid worms increased the redox potential, possibly through sediment reworking. Microbial communities were very similar across oxic treatments; however, the fractions of α-, β-, and γ-Proteobacteria and Sphingobacteriia increased, whereas those of Actinobacteria, Planctomycetes, and Omnitrophica decreased compared to hypoxic controls. Sediment microbial communities were, moreover, distinct from those of macrofaunal tubes or feces. We suggest that, under the conditions studied, bottom water oxygenation has a stronger biogeochemical impact on lacustrine surface sediments than macrofaunal bioturbation.

Physiological-biotechnological aspects of drought resistance of narrow-leaved lavender (Lavandula angustifolia mill.)

2021 ◽  
Vol 12 (3) ◽  
Author(s):  
O Klyachenko ◽  
◽  
I Shliakhtun ◽  
Keyword(s):  
Aquatic Vegetation ◽  
Left Bank ◽  
Small Areas ◽  
Code Of Phytosociological Nomenclature ◽  
Higher Aquatic Vegetation ◽  
Nature Park ◽  
Original Field ◽  
Natural Boundaries ◽  
Phytosociological Nomenclature ◽  
Coenotic Diversity

National Nature Park “Pyryatynsky” is a valuable reserve of flora and vegetation of the Left-Bank Dnipro. The extensive hydrological network of the Udai River and the wide representation within this nature reserve of floodplain reservoirs are the reason for the high diversity of plant communities of higher aquatic vegetation. In this article we classified the communities of order Callitricho-Batrachietalia in National nature park "Pyryatynskyi" and identify the features of their syntaxonomic and ecological differentiation. Fragmentary and non-comlete information about this type of vegetation are existed in literature, however, without geobotanical releves and detailed characteristics of the structure of phytoceonoses, synecology and synchorology. All obtained results based on original field data. In total, 22 geobotanical releves were performed during the period 2010–2017. The description of communities was carried out within their natural boundaries. Treatment of fitosociological data was performed with the JUICE software package. The nomenclature of syntaxons was consistent with the International Code of Phytosociological Nomenclature (ICFN).The order of Callitricho-Batrachietalia on the territory of NPP "Pyriatynsky" is represented by alliance Batrachion aquatilis Gehu 1961 and 4 associations (Batrachietum aquatilis Gehu 1961, Potameto perfoliati–Batrachietum circinati Sauer 1937, Hottonietum palustris Sauer 1947, Veronico beccabungae–Callitrichetum stagnalis (Oberdorfer 1957) Th. Müller 1962). This is first prodrome of order Callitricho-Batrachietalia for territory of National Nature Park “Pyryatynskyi”. The communities of this syntaxon occupy small areas and have a limited distribution in the region. Most of them are rare and vulnerable to changes in environmental conditions. Monitoring of their structure, chorology and dynamics is an important task to maintain and preserve the species and coenotic diversity of NPP "Pyryatynsky".

scholarly journals Migration of heavy metals in system of coastal soil – bottom sediments – plants of the Khodtsa river during summer mean water in 2019

2020 ◽  
Vol 2020 (2) ◽  
pp. 67-74
Author(s):  
Zhanna Sergeevna Makakhaniuk ◽  
Valentina Mikhailovna Zubkova ◽  
Lyubov Anatolievna Rozumnaya
Keyword(s):  
Heavy Metals ◽  
Bottom Sediments ◽  
Aquatic Vegetation ◽  
River Mouth ◽  
Petroleum Products ◽  
Small River ◽  
Laboratory Research ◽  
Intermediate Point ◽  
Higher Aquatic Vegetation ◽  
Environmental Monitoring System

The article describes the purpose of the work, which is determining the distribution and relationships between the composition of pollutants in coastal soil, bottom sediments and higher aquatic vegetation in the small river Khodtsa. There have been presented the data of the laboratory research based on the results of the field work onselecting samples, on concentration of toxicants (cadmium, lead, iron, nitrogen, ammonium and petroleum products) in deposit media, as well as in Carex aquatilis plants of the small river Hodza. This plant species is limiting throughout the river due to the low intensity of biological absorption. The studies were carried out during the summer low water season in 2019 on the river section from the source (Elektrostal city) to the river mouth in the area of Pavlovsky Posad. In all the studied objects there have been found increased concentrations of iron. In the coastal ground and bottom sediments the pollution with heavy metals is manifested to a much greater extent: at the source and intermediate point. Petroleum products and ammonia nitrogen are distributed unevenly in space. A correlation analysis of the experimental data obtained in the components of the environment of the studied territory (the Khodtsa river) was performed. In general, the highest measurement results are observed in the upper reaches of the small river Khodtsa in the industrial city of Elektrostal. The obtained data on the heavy metals migration in the system “сoastal ground – bottom sediments – higher aquatic vegetation” of the small river Khodtsa can be successfully used as indicators an environmental monitoring system and serve as the basis for organizing further research, as well as for developing a strategy for environmental management and environmental protection in the Moscow Region.

scholarly journals Modern condition and analysis of anthropogenous-climatic transformation of vegetation of lakes of the northern Steppe land

2018 ◽  
Vol 29 (2) ◽  
Author(s):  
N. O. Roshchyna
Keyword(s):  
Aquatic Ecosystems ◽  
Aquatic Vegetation ◽  
Snow Accumulation ◽  
Floodplain Lakes ◽  
Anthropogenic Factors ◽  
Chemical Pollution ◽  
Ecological Groups ◽  
Adventive Species ◽  
Higher Aquatic Vegetation

In this article, the current and former distribution of higher aquatic vegetation has been analyzed for floodplain lakes, arenas lakes and third terraces lakes in the valleys of large and medium North-Steppe Dnieper rivers. The article is devoted to the current state analysis of the higher aquatic vegetation at North-Steppe Dnieper lakes, its dynamics over a long-term period, as well as the determination of the nature and extent of anthropogenic-climatic changes in vegetation. Anthropogenic influence is a major threat to the development and functioning of most aquatic ecosystems. Since the twentieth century, it has been intensified by trends to long-term climate changes, which are also largely result of human activity. Increasing temperature of the winter season does not contribute to snow accumulation. Reduction of snow accumulation (frequent thaws during the winter), regulation of river flow (formation of a reservoirs cascade and ponds) and accumulation of melt water in artificial reservoirs led to the smoothing of the peak of the spring flood. Thus, the factor that provided spring washing of floodplain lakes, limited their overgrowing by air-water vegetation and their waterlogging disappeared. The anthropogenic factors that influence negatively include: intensification of agriculture, plowing of coastal areas, unreasonable land reclamation, overgrazing, development of transport and engineering infrastructure, urbanization, recreation, and chemical pollution. The presented data was obtained on the basis of processing our own research materials of 2009–2018 and literary and archival materials analysis (the herbarium of the Dnipropetrovs’k National University and the archive of the Research Institute of Biology). Natural Northern Steppe Dnieper lakes are located mainly in river valleys, so the study area was conventionally divided into sections: the large river valley (Dnieper) and the middle rivers valleys (Samara and Orel). Three ecological groups of macrophytes were reviewed and compared: hydatofites (submerged species), pleistophytes (species with floating leaves) and helophytes (air-water species). The vegetation of Dnieper floodplain lakes practically did not change for all three formation groups. The number of immersed plants communities within the floodplains of medium-sized rivers has decreased by three. The pleistophytes and helophytes associations decreased to fragments of associations. The lakes vegetation within the sandy Dnieper terrace practically did not change for all three formation groups. The submerged lakes plants associations within the sandy medium-sized rivers terraces have been reduced by two. As part of the lakes vegetation on the Dnipro saline terraces, fragments of associations of the two species are considered extinct. A new association of southern adventive species Ruppia maritima L. has appeared within the limits of the middle rivers saline terrace. Changes in higher aquatic vegetation are characteristic of all types of lakes. Changes occur in the direction of crowding out higher aquatic vegetation communities by airborne plant communities. The consequence of the anthropogenic-climatic transformation of aquatic ecosystems is increased mineralization, siltation, and, as a result, intensive overgrowing of lakes by aboriginal and adventive species with a wide ecological amplitude (replacement of sensitive to environmental changes species).

THE STATUS OF RECYCLING OF ORGANIC WASTE ON THE POULTRY FARM «MIKHNEVSKAYA»

2019 ◽  
Vol 1 (2) ◽  
pp. 198-204
Author(s):  
Yu. M. Subbotina ◽  
Keyword(s):  
Pathogenic Bacteria ◽  
Aquatic Vegetation ◽  
Experimental Studies ◽  
Sewage Water ◽  
Poultry Farm ◽  
Fish Ponds ◽  
Seed Material ◽  
Higher Aquatic Vegetation ◽  
The Status ◽  
Poultry Wastewater

The article deals with the problem of recycling in poultry farm Mikhnevskaya. The work program provided for the continuation of studies on the development of the system of pond preparation of sewage water in biological ponds of purification. As one of the options, the systems of BOCS ponds (biological oxidation contact stabilization ponds) and ponds with higher aquatic vegetation, as a system of posttreatment of wastewater, as well as the use of fish ponds were proposed. The development of devices that provide deeutrophication of decontaminated wastewater in the BOCS ponds was started. As measures that contributed to the improvement of water purification to be discharged into the environment, an attempt was made to introduce at the final stages of purification of the algobacterial complex, higher aquatic vegetation, and fish seed material. A survey of the poultry farm was conducted; the conditions of wastewater formation of the Mikhnevskaya poultry farm of Stupinsky district of the Moscow region were studied. Model experiments were carried out at the Mikhnevskaya poultry farm in laboratory and semi-production conditions, directly in the laboratory of the Institute at the facility. In the course of experimental studies it was found that in the ponds under the influence of algological complex of microalgae was the process of purification and disinfection of poultry wastewater. The total death of pathogenic bacteria of the E. coli group occurred on 6-11 days after the introduction of microalgae into the water of the algal pond, which does not contradict the existing developments. At the same time, there was still an increase in fish seed material, which was sufficiently provided with food and by the autumn reached a mass of 410 grams.

scholarly journals ACCUMULATION OF HEAVY METALS BY HIGHER AQUATIC VEGETATION OF ARTIFICIAL CANALS

2014 ◽  
Vol 59 (2) ◽  
Author(s):  
Тetiana Bilyk ◽  
Olga Shylo ◽  
Galyna Karpova ◽  
Olena Chumanova
Keyword(s):  
Heavy Metals ◽  
Aquatic Vegetation ◽  
Higher Aquatic Vegetation

scholarly journals PHYTOPLANKTON STATE AND CYANOTOXINS IN THE SVYATOZERO LAKE BLOOM SPOT (ONEGA LAKE BASIN, RUSSIA)

2021 ◽  
Vol 26 (1) ◽  
pp. 50-60
Author(s):  
V. S. Smirnova ◽  
◽  
E. V. Tekanova ◽  
N. M. Kalinkina ◽  
E. N. Chernova ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Large Scale ◽  
Total Content ◽  
The State ◽  
Water Bloom ◽  
Lake Basin ◽  
The North ◽  
Cyanobacterial Species ◽  
The Republic ◽  
Recreational Use

Introduction. This paper is the first to address the state of phytoplankton in eutrophic Svyatozero Lake (61о32´ N, 33о35´ E.), used for trout farming in the Republic of Karelia, in the North-Western Region of Russia, during the period of water bloom. For northern reservoirs, water bloom is not a typical phenomenon. However, due to climate warming and the large-scale development of trout breeding in the region, it becomes more urgent to study blooming reservoirs and related consequences for northern aquatic ecosystems and humans. Methods. We processed phytoplankton samples and measured photosynthesis using conventional methods. The concentration of chlorophyll a in water was determined spectrophotometrically, and the content of cyanotoxins was estimated by liquid chromatography-mass spectrometry. Results. In September 2019, we studied the structural, quantitative and functional characteristics of phytoplankton in the bloom spot. The phytoplankton abundance was 198.712 mln cells/l, the biomass was 14.945 mg/l, and the concentration of chlorophyll a reached 215.3 μg/l, which corresponded to the β-eutrophic state of the ecosystem in the study area. It was revealed that cyanobacteria corresponded to 99.8% of the biomass and 96.7% of the abundance. The species of the genus Microcystis were dominant (42%). They are well-known potential producers of cyanobacterial hepatotoxins, in particular, microcystins. We established the presence of microcystins. Their intracellular and extracellular concentrations were equal and in total amounted to 12.56 μg/l. We also identified eight structural variants of microcystins; among those, [D-Asp3] MC-RR accounted for up to 90% of the total content. The most toxic MC-LR variant was present in trace amounts only in biomass. According to the WHO standards, the content of microcystins and the number of cyanobacterial cells in the Svyatozero Lake bloom spot corresponds to average danger in the case of recreational use and can pose a threat to human health. Conclusion. It is necessary to monitor the phytoplankton composition, the presence of potentially toxic cyanobacterial species and cyanotoxins, as well as the state of trout farmed in the waters of Svyatozero Lake, since cyanotoxins can accumulate in fish tissues.

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