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Статті в журналах з теми "Hydrobiological pollution"

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Автор: Grafiati

Опубліковано: 30 травня 2022

Оновлено: 31 травня 2022

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1

Lubsanova, E. L. "Digital maps of hydrobionts and surface waters quality, the Baikal natural territory." Geodesy and Cartography 967, no. 1 (February 20, 2021): 2–12. http://dx.doi.org/10.22389/0016-7126-2021-967-1-2-12.

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The author provides information on a developed method of geoinformation mapping hydrobionts in order to automatize digital cartographic images formation with spatial-andtemporal distribution of species and long-term trends of freezing surface waters’quality changes at studying relationships in the functioning of hydrobiological communities. The features of technique with the description of technical stages for creating databases and constituent elements of geoinformation software by the example of designing a regional geoservice with interactive plankton-and-benthos-aquatic-organisms’ maps in the Baikal natural territory are presented. Signs mapping the classes of water pollution by hydrobiological indicators on points available for recognition by colour-blind people are offered to be applied in cartographic material. They are easily reproduced on objects near surface streams in cases of water pollution for warning the population.

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2

Sukop, Ivo. "Hydrobiological study of the Bobrava rivulet." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 56, no. 2 (2008): 175–80. http://dx.doi.org/10.11118/actaun200856020175.

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The qualitative and quantitative composition of macrozoobenthos in the Bobrava rivulet was summarized utilizing former and recent studies. Altogether, 187 taxa of macrozoobenthos were determined in the Bobrava rivulet and its tributaries until now. The highest values of macrozoobenthos were found on the stony substrate with mean values of biomass and density corresponding to 18.7 g . m−2 and 2922 ind . m−2, respectively. Lower values were determined on the muddy and sandy substrates with 12.4 g . m−2 and 1587 ind . m−2, and 4.2 g . m−2 and 531 ind . m−2, respectively. The index of saprobity upstream the town Rosice corresponded to oligo-betamesosaprobity. Downstream the towns of Rosice, Omice and Radostice on the middle course of the Bobrava rivulet, water duality declined to beta – to alphamesosaprobity. Due to the self-purification ability of the stream, its water quality was improved to beta-mesosaprobity bellow the municipal pollution sources in the river stretch between localities Závist and Želešice.

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3

Tumas, Rimvydas. "Lithuanian karst region rivers' water ecology: hydrochemical and hydrobiological evaluation." Hydrology Research 35, no. 1 (February 1, 2004): 61–72. http://dx.doi.org/10.2166/nh.2004.0005.

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The Lithuanian karst region covers about 1000 km3 in the northern part of the country. This is the most vulnerable area from a pollution point of view. The structure of the total dissolved solids (TDS) shows that the flow of rivers in the karst region is from hydraulically interconnected aquifers. For the last decade (1991–2000) TDS has varied considerably, from 529 to 732 mg/l. The predominant sources of nitrogen and phosphorus within the headwaters of the monitored rivers were diffuse and agricultural in nature. Downstream from the towns nitrogen and especially phosphorus showed both diffuse and point source signals. Contributions of point sources to the stream pollution by nutrients prevail. The time series of monthly dissolved oxygen (O2) in the main karst region river – the Musa – shows the existence of multiplicative seasonality. The trend cycle (1991–1999) shows low levels of dissolved oxygen in 1991–1993, with a similar fluctuation in 1994, 1995 and 1996 (due to point pollution from the town of Siauliai) and a gradually improving situation since 1997. The general multiplicative trend of dissolved oxygen in the lower reaches of the Musa river (near the border with Latvia) is decreasing (within the accuracy limits). The abundance and species of zoo benthos are suitable criteria (biotic index – BI) for evaluation of a river's biological water quality. Zoo benthos demonstrates tolerances that vary among species, the oxygen regime and the pollution with nitrogen. The best living conditions for invertebrates are in the riverhead of the karst region rivers – BI=5.62–6.74 (1991–1999), where pollution with nutrients is caused mostly by agricultural activity. Rare and asynchronous data of biological water quality shows up tendencies that invertebrates prefer less contaminated reaches of rivers.

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4

Korolevskaya, Valentina, Olga Soprunova, Alina Galperina, and Alina Bareeva. "Assessment of watercourses of Astrakhan by hydrobiological and microbiological indicators." Vestnik of Astrakhan State Technical University. Series: Fishing industry 2019, no. 4 (December 13, 2019): 24–31. http://dx.doi.org/10.24143/2073-5529-2019-4-24-31.

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The paper focuses upon the control over environmental pollution of water bodies by human waste products in urban areas, which can be carried out by monitoring hydrobiological indi-cators. In the course of study undertaken in May 2017 and 2018 there was assessed the ecological and sanitary status of the Volga and Kutum rivers that flow on the territory of Astrakhan. Samples were taken at four stations; the choice of station location was determined by the presence of pollutant sources: proximity of the city market or the power plant. Quantitative and qualitative indicators of the state of phytoplankton were used as hydrobiological indicators; the total number of bacteria and the total content of coliform bacteria were evaluated as microbiological indicators. During the study period the ecological and sanitary state of water was rated as satisfactory. The number of algae taxa increased insignificantly (by 3 units), diatoms predominated in the number of genera and number. Despite the presence of 4-5 species of pure water representatives in the investigated waters, the sanitary and bacteriological situation at all the studied stations was found unfavorable; the water was characterized as polluted and dirty. In 2018, there was registered deterioration of water quality compared to 2017, while the calculated saprobity index in the Kutum river indicates the water quality improvement downstream. The increasing value of the water saprobity index in the Kutum river indicates a tendency toward the growing level of organic pollution and necessitates a comprehensive analysis of hydrobiological indicators for systematic monitoring the aquatic environment.

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5

Shukla, Manoj Kumar, Pushpendra Kumar Khare, and Ravindra Singh. "Hydrobiological Study of the Yamuna River at Kalpi, District Jalaun, Uttar Pradesh, India." Hydro Nepal: Journal of Water, Energy and Environment 18 (March 15, 2016): 41–46. http://dx.doi.org/10.3126/hn.v18i0.14643.

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Hydro biological study of the Yamuna river at Kalpi in India was carried out for a period of twelve month (October 2013 to September 2014). Four sampling stations were selected for sampling purpose. Collected samples were evaluated for fourteen physico-chemical parameters such as W.T., pH, Conductivity, Turbidity, T.D.S., T.H., T.A., Cl, SO4, PO4, NO3, D.O., B.O.D. and C.O.D. and four biological parameters such as phytoplankton, zooplankton, aquatic macrophytes and fishes. Present study reveals that water quality of the Yamuna river was not fit for drinking purpose but it was satisfactory for fish culture and irrigation purpose. Presence of both pollution tolerant and pollution intolerant species of biological parameters shows that this water was moderately polluted during course of study. HYDRO Nepal Journal of Water Energy and EnvironmentVolume- 18, 2016, JanuaryPage -41 to 46

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6

Entz, B., and D. Lukács. "Dr Jenö Daday de Deés and the Hungarian hydrobiological research." Hydrobiologia 145, no. 1 (February 1987): 1–3. http://dx.doi.org/10.1007/bf02530259.

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7

Simic, Vladica, and Snezana Simic. "Structure of the macrozoobenthos as an indicator of different types of pollution in running waters." Archives of Biological Sciences 54, no. 3-4 (2002): 79–86. http://dx.doi.org/10.2298/abs0204079s.

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Hydrobiological research on streams with different dominant forms of pollution (anthropogenic eutrophication, organic pollution, toxic pollution, trans-saprobic pollution) in the central part of the Balkan Peninsula (territory of Serbia and Montenegro) indicates that these different forms of pollution can be detected on the basis of structure of the macrozoobenthos community and individual indicator taxa. It is established from the obtained results that the greatest community diversity occurs in the case of anthropogenic eutrophication or weak organic pollution as a dominant process, where phytophilous and/or detritophagic forms (Cloeon, Polypedilum, Asellus, Stylaria, Erpobdella, Gammarus) are dominant in the community. In the cases of very strong organic pollution, the macrozoobenthos community is characterized by mass development of certain taxa of the group Oligochaeta (Tubificidae) and Chironomidae larvae {Chironomus gr. thummi). Depending on the strength and contribution of organic, toxic, and/or transsaprobic components, toxic pollution and mixed pollution arc characterized by a more or less heterogeneous and nonspecific population. However, a common feature is the presence of a small number of taxa with populations of a relatively low density, or the occurrence of individual specimens belonging to different groups of animals.

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8

KAREVA, E. S., and G. A. GULAMANOVA. "CONDITION OF PRIMARY PRODUCERS COMMUNITIES IN THE AREA OF THE CITY OF UFA WASTEWATER BIOLOGICAL TREATMENT PLANTS’ DISCHARGE." Urban construction and architecture 2, no. 3 (September 15, 2012): 59–64. http://dx.doi.org/10.17673/vestnik.2012.03.13.

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Prediction and assessment of ecological condition of watercourse receiving wastewater can be made with the use of a variety of methods including hydrobiological and some others.The article describes the study of wastewater eﬀects on the degree of phytoplankton growing in the area within 500m up and down the Belaya River from the city wastewater treatment plant and Demsk sewage treatment plants of Ufa. Basic structural and quantitative characteristics of autotrophic plankton are analyzed. The degree of organic pollution according to indicator groups is identified. The estimation of one of the basic components of aquatic ecosystem structure is given.

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9

Kozlov, Andrey Vladimirovich, Nataliya Nikolaevna Koposova, Irina Pavlovna Uromova, Elena Aleksandrovna Krotova, Anna Vladimirovna Matveeva, and Nadezhda Vasilevna Polyakova. "The Level of Ecological and Hydrobiological Indicators in the Cheboksary Reservoir." Environment and Ecology Research 9, no. 5 (October 2021): 235–41. http://dx.doi.org/10.13189/eer.2021.090504.

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10

Suppes, Natalia Evgenievna. "The impact of economic activity on the ecological state of the water reservoirs of Ishim." Samara Journal of Science 7, no. 3 (August 15, 2018): 98–103. http://dx.doi.org/10.17816/snv201873118.

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This article analyzes the problem of the state of the water bodies in Ishim by anthropogenic pressures. The study shows that the water reservoirs are negatively influenced by the economic activities of the population. The author defines their main directions: industrial wastewater discharge to the city water bodies, construction and operation of engineering constructions, activity in the private sector. To assess the state of the water bodies the author uses the results of the visual assessment of the state of the riverbeds and their coastal zone, the organoleptic water indicators (turbidity, color and smell), the analysis of the hydrobiological studies (determination of the degree of saprobity of the water bodies as indicators ciliated infusoria). The study showed the satisfactory condition of all the water reservoirs and the non-critical impact. As the enterprises for light manufacturing and food industries in Ishim are not sources of chemical, organic and other pollution the visual assessment didn't reveal significant deformations of the riverbeds and any changes in the coastal zone. The impact of the private sector is local and not the significant cause of organic pollution.

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11

Atayan, A., and V. Dolgov. "Parallel algorithms for solving diffusion-convection problems on a multiprocessor computer system using hybrid MPI / OpenMP technology." Journal of Physics: Conference Series 2131, no. 2 (December 1, 2021): 022008. http://dx.doi.org/10.1088/1742-6596/2131/2/022008.

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Abstract The paper deals with the mathematical models, algorithms and software for mathematical modeling of coastal systems’ water pollution spreading dynamics under various unfavorable phenomena of natural and artificial genesis, developed for high-performance cluster systems. Methods for partitioning the computational domain for solving diffusion-convection problems have been developed, which allow for efficient parallelization of a computationally complex modeling problem, taking into account the architecture of the multiprocessor system used. The developed mathematical models are based on high-precision models of hydrophysics and hydrobiology and take into account the peculiarities of water systems in the south of the Rostov region, as well as factors of hydrobiological dynamics such as microturbulent diffusion and advective transport in various directions, mechanisms of primary and secondary pollution of coastal systems, taking into account currents. The paper presents algorithms for solving a simulated problem based on MPI parallelization technology, as well as based on mixed MPI + OpenMP technology. Numerical experiments have been carried out and the two technologies efficiency comparison has been made in the conditions of computing cluster used.

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12

Vinogradova, I. E. "Professor Nikolai Yuryevich Zograf (1852–1920), the founder of The Hydrobiological Station on Lake Glubokoe." Hydrobiologia 141, no. 1-2 (October 1986): 7–10. http://dx.doi.org/10.1007/bf00007475.

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13

Sharma, Shraddha, Savita Dixit, Praveen Jain, K. W. Shah, and Rakesh Vishwakarma. "Statistical evaluation of hydrobiological parameters of Narmada River water at Hoshangabad City, India." Environmental Monitoring and Assessment 143, no. 1-3 (October 6, 2007): 195–202. http://dx.doi.org/10.1007/s10661-007-9968-8.

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14

Champalbert, Gisèle, Marc Pagano, Robert Arfi, and Cristèle Chevalier. "Effects of the sandbar breaching on hydrobiological parameters and zooplankton communities in the Senegal River Estuary (West Africa)." Marine Pollution Bulletin 82, no. 1-2 (May 2014): 86–100. http://dx.doi.org/10.1016/j.marpolbul.2014.03.015.

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15

Litvinov, V. N., N. B. Rudenko, A. A. Filina, and A. V. Nikitina. "Mathematical modeling of the pollutant distribution process in the Gelendzhik Bay." Journal of Physics: Conference Series 2131, no. 3 (December 1, 2021): 032049. http://dx.doi.org/10.1088/1742-6596/2131/3/032049.

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Abstract Currently, the pollution problem of coastal sea waters in the resort areas of the Black Sea is becoming increasingly urgent. Thousands of chemicals, industrial and household waste enter the water basins every year, which significantly worsens the state of marine waters. Storm drains are saturated with pollutants at precipitation, washing out various chemical compounds, garbage and transporting them to the sea. In addition, a separate problem is poorly self-cleaning of the Gelendzhik Bay. A complete water change occurs in the period from 1 to 6 days. This paper covers the development, research and numerical implementation of a mathematical model of the pollution transport, including petroleum products, in the Gelendzhik Bay taking into account a number of important hydrodynamic and hydrophysical factors, methods of its numerical implementation, which allow predictive modeling of the pollution spread in shallow water systems in a limited time. A hydrobiological model of a coastal system characterized by significant depth differences has been developed. A three-dimensional mathematical model is designed to research the transformation of the phosphorus, nitrogen and silicon forms in the plankton dynamics problem. It takes into account the convective and diffusive transports, absorption and release of nutrients by phytoplankton, salinity, temperature, oxygen regime, etc. Using a spatial-three-dimensional hydrodynamics model, taking into account the physical properties of water environment of the coastal system, calculation results are used as input data for the development of scenarios for the dynamics of transport processes and the transformation of pollution biogenic elements in the water.

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16

Trožić-Borovac, Sadbera, Rifat Škrijelj, Alma Imamović, Samir Đug, Mahir Gajević, and Adi Vesnić. "MACROZOOBENTHOS AS AN DETERMINANT OF ECOLOGICAL STATUS OF THE BOSNA RIVER." Radovi Šumarskog fakulteta Univerziteta u Sarajevu 45, no. 1 (June 1, 2015): 52–65. http://dx.doi.org/10.54652/rsf.2015.v45.i1.94.

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UDK: 574.587(282.249 Bosna) The paper presents the distribution and diversity of macrozoobenthos composition of Bosna river up to Zenica, from 1999 to 2010. Macrozoobenthos has been chosen as an element of bioevaluation of the ecological state of running water, and according to the provisions of the Water Framework Directive. Sampling has been done by using the kick-sampling amd multihabitat method, a standard for hydrobiological research. The highest diversity of macrozoobenthos has been found in samples from the sites Rimski most (36 taxa), and the lowest was at site of the Bosna River upstream from the mouth of Ljubina river and downstream of the mouth of the Zgošća river (4 taxa). According to abiotic conditions which directly affect the composition of macrozoobenthos, and using Bray-Curtis similarity, the highest degree of similarity has been found in sites which are spatially nearby. Taxa number and EPT taxa number were highly correlated (R2 = 0,871). Saprobic index and BMWP index were calculated in assessing the ecological status of the river Bosna at the study sites. The values obtained comparing EPT taxa number and BMWP index show a high correlation (R2 = 0,706). The composition and the distribution of the macrozoobenthos in the Bosna river are conditioned by abiotic parameters. Sites upstream of the mouth of the Ljubina river and downstream from the mouth of the Zgošća river represent the places with the highest pollution which is the result of point and diffuse sources of pollution.

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17

Kuznetsova, K. Yu. "OPTIMIZATION OF METHODS OF STATE MONITORING OF WATER BODIES FOR PARASITOLOGICAL INDICES." Hygiene and sanitation 96, no. 5 (March 27, 2019): 437–42. http://dx.doi.org/10.18821/0016-9900-2017-96-5-437-442.

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In an article there are discussed flaws in the formation of statistical parasitological indices in systems of socio-hygienic and hydrobiological monitoring. There is considered the relevance of free-living protozoa Amoebae accounting group, classification of the hazard and the role in the development of the water caused infectious morbidity of the population. There is presented an analytical factorization of the state of surface waters and there are considered the local values of parasitic contamination. Summary statistical reports of federal institutions - participants of the state monitoring of water bodies were established to be formed within the framework of closely specified indices and not be incorporated in the common accounting database. There are provided recommendations on the organization of a comprehensive evaluation of the biological safety of water sources.

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18

Medvedeva, Ljudmila, Maria Frolova, Maria Moskovets, and Artem Medvedev. "Introducing Nature-Saving Technologies as an Environmental Imperative in the Development of Regions." Vestnik Volgogradskogo gosudarstvennogo universiteta. Ekonomika, no. 4 (February 2020): 126–40. http://dx.doi.org/10.15688/ek.jvolsu.2019.4.13.

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The article deals with the conservation and restoration of water resources, which is one of the basic factors of regional development. O.V. Inshakov paid attention to this factor highlighting natural resources (land, water, minerals, forests and others) with a certain set of indicators of quantity, structure and quality in the structural and logical model of the development of Volgograd region – 2030. One of the key directions of the civilization development in the 20th century was the search and practical application of a new class of technological and technical solutions in the field of water conservation with the ecological imperative “preserve nature for future generations”. This implies the gradual elimination of their practices of economic activity processes that can lead to irreversible consequences in the ecosystem of the planet. In this context, the issues raised in the article on the study and preservation of natural water quality in the South of Russia are very justified and relevant. As a result of the anthropogenic impact (pollution by industrial, agricultural and municipal effluents), nitrogen, phosphorus, chlorine-containing substances causing fatal mutations and the process of “blooming” of water bodies are concentrated in excess in natural water. Many countries face the problem of “blooming” of water bodies as a result of intensive growth of blue-green algae. The importance of solving this problem is explained by the fact that the toxins entering water from the biological activity of blue-green algae are very dangerous for human health and other organisms. Scientific literature provides examples of human diseases from using water with a significant amount of cyanobacteria blooms. When “blooming” biomass of blue-green algae accumulates in the coastal part and causes technical difficulties in supplying water to the water supply network, the formation of overseas zones and the death of hydrobionts. Existing methods of combating “blooming” have a number of significant drawbacks, for example, mechanical methods require high financial costs, and chemical ones are environmentally unsafe. The article presents the results of the scientific research of the All-Russian Research Institute of Irrigated Agriculture, Volgograd (Volgograd) on using biotechnology for natural water purification. The experiment on introducing Chlorella vulgaris IGF no. C-111 microalgae into the bays of the Volgograd reservoir was carried out on the basis of preliminary compilation of the hydrological characteristics of the reservoir bays, determination of hydrobiological and hydrochemical qualities of water. The aim of the work was to substantiate the technology of introducing Chlorella vulgaris IFR no. C-111 strain into the bays of the Volgograd reservoir and to obtain data confirming the scientific hypothesis – the expediency of using Chlorella vulgaris IFR no. C-111 strain to improve the hydrobiological and hydrochemical composition of natural water.

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19

Nikitenko, A. I., D. V. Goryachev, N. N. Klets, A. V. Zdrok, S. S. Uscova, I. U. Badaeva, M. S. Kukin, and A. A. Vishtorskaia. "Results of a comprehensive study of water bioresources of lake Senezh." Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), no. 10 (October 1, 2020): 6–17. http://dx.doi.org/10.33920/sel-09-2010-01.

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In the paper, preliminary results of hydrochemical, hydrobiological, parasitological and ichthyological investigations have been given, carried out on waters of the Lake Senezh in 2020 and compared with analogous works for 2004–2006. The ecosystem of the given water object is extremely understudied. In the size structure of fish species, caught in 2020, dynamics of a good reproduction potential could be noted. The condition factor of all fish species is very high. One can see a significant prevalence of females over males, excepting bream, in all fish groups studied. The water object investigated showed the 2,8 times MPC increase for iron in fish farming water bodies. Concentration of toxic elements in water samples and bottom sediments did not increase MPC for all other indices. The bacteriological water analysis showed insignificant increase of bacterial contamination at the area of the investigation station 6 only, what is most likely of the anthropogenic nature and is being a result of the littoral lake zone pollution. Parasitological analysis of the Senezh lake fishes indicates of o high level of their invasion. 11 parasites species were found in 3 fish species investigated, which were represented by 73% of trematodes at the metacercaria and maritas stage. The fish ergasiles problem, existed in this water body since 2005 and up to-date, continues. In zanders gills, parasitic Ergasilus sieboldin were found. The given work would be interesting for investigators who will study the Senezh lake as well as other water bodies of the Moscow area.

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20

Britto, E. R., E. P. Jordão, J. Semeraro, and W. M. Castro. "Ten Years of Operation of Rio De Janeiro'S Ipanema Submarine Outfall." Water Science and Technology 18, no. 11 (November 1, 1986): 177–87. http://dx.doi.org/10.2166/wst.1986.0153.

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Monitoring and surveys of the Ipanema Submarine Outfall of the city of Rio de Janeiro have been practiced during the 10 years of the outfall operation. The outfall is a 2.4m diameter prestressed concrete pipeline, 4.3 km long, extending 3.3 km seaward to a depth of 27m. It discharges presently 6 m3/s average raw sewage flow, through a 450m long diffuser. A planned survey program was established in order to verify pipe conditions through periodical deep sea inspection, monitored by radio and video recording; this paper discusses the preventive and corrective maintenance of the outfall, especially the failures that occurred in 5 accidents. It discusses also the water quality monitoring program established one year before the outfall began its operation in 1975. A program had been prepared which established beneficial water uses, water quality standards required for protection of the uses,and a monitoring system which provides the input data for verifying compliance with the standards. Pre-discharge studies were conducted for one year prior to operation, to provide background data on the various parameters, and over 70 000 analyses were made during the 10 years of the outfall operation. This paper evaluates the results of grease, coliforms, and hydrobiological indicators, as the most representative parameters of water quality in the sea. It shows that a marked improvement has occurred in the water quality. It also shows that the beaches receive a great amount of pollution through the canals of Visconde de Albuquerque Avenue and Jardim de Alá (Rodrigo de Freitas Lagoon), due to sewage overflows from the sewer network and the storm-water networks. The importance of giving special attention to the sewer network in systems involving submarine outfalls is stressed.

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21

Vizer, Lyubov Semyonovna, Alexander Mikhailovich Vizer, Iuliia Vital’evna Tsygankova Iuliia Vital’evna Tsygankova, and Andrey Valeryevich Tsapenkov. "Features of the formation of zooplankton of the upper Ob in the conditions of the influence of the megapolis." Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries), no. 8 (July 27, 2021): 21–31. http://dx.doi.org/10.33920/sel-09-2108-02.

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Journal: Рыбоводство и рыбное хозяйство №8 2021, №8, 2021 Based on the data obtained in the study of some hydrobiological sections of the Ob River, located above and below the city. The qualitative and quantitative characteristics of the zooplankton community were considered, and the saprobity index was calculated. The species composition is represented by 34 species from three systematic groups, of which 12 are rotifers (Rotifera), 14 are branchial crustaceans (Cladocera), and 10 are copepods (Copepoda). The highest species diversity was observed above the city — 34 taxa, the lowest below the city — 14. The average number of zooplankton above the city of Novosibirsk is insignificant and reached 761 copies/m³ per year. Most (49%) were copepods (Copepoda). The number of rotifers (Rotifera) was 34% of the total. In the summer, the number of zooplankton was slightly higher than the annual one and amounted to 871 copies/m³. The average annual biomass of zooplankton had low values and was 35.0 mg/m³. The maximum summer values reached 180 mg/m³. In the study area of the Ob River below Novosibirsk, the average number of zooplankton increases to 2,4 thousand copies/m³. The group of oar-footed crustaceans dominated in number, its share reached 91%. The number of branchiform crustaceans was 7%. The average annual zooplankton biomass in the river below the city limits was 99.53 mg/m³. The value of the saprobity index in the area above Novosibirsk was 1.6, which indicates the presence of weak organic contamination and corresponds to beta-mesosaprobic conditions. In the zone below Novosibirsk, the saprobity index was 2.0, which indicates an increase in organic pollution and corresponds to beta-mesosaprobic conditions. An increase in the level of eutrophication contributes to a change in the structure of zooplankton. This is reflected in a significant decrease (2.4 times) in the species diversity of zooplankton and a significant increase in quantitative indicators: abundance — 3.2 times, biomass — 2.8 times.

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Orekhova, N. A. "Redox conditions of bottom sediments and macrozoobenthos characteristics in the Kruglaya and Kazachya bays (Sevastopol)." Marine Biological Journal 6, no. 4 (November 30, 2021): 68–86. http://dx.doi.org/10.21072/mbj.2021.06.4.06.

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A lack of systemic and environmentally efficient approach to exploitation of the Kruglaya and Kazachya bays (Sevastopol) resulted in their severe pollution. The conjunction of natural and anthropogenic factors led to deterioration of habitat conditions of benthic communities. The aim of this work was to carry out complex research of Kruglaya and Kazachya bays’ ecosystems to study peculiarities of formation of redox conditions in bottom sediments and bottom water layer, as well as their effect on macrozoobenthos characteristics. Bottom sediments were sampled by diver in plexiglass tubes hermetically sealed at the top and bottom; it helped in preserving a fine structure of bottom sediments and bottom water layer. To study benthic communities, samples were taken in the same spot with a manual sampler. To obtain chemical composition of pore waters with high vertical resolution, the voltammetry analysis was carried out. Calculation of an oxygen flux at the boundary and in the upper layer of bottom sediments was performed according to the vertical profile of oxygen concentration in pore waters and geochemical analysis with applying the equation for the Fick’s first law and considering concentration gradient and molecular diffusion of oxygen in pore waters. Standard hydrobiological methods were applied for the analysis of benthic material. When calculating the values of the Shannon diversity index (H’), the binary logarithm was used. The data analysis showed as follows: a high level of anthropogenic load and restricted water dynamics resulted in siltation of bottom sediments in the studied water areas, which obstructed oxygen penetration; the accumulation of organic carbon contributed to its active consumption. Stratification of a water column due to limited water exchange, high temperature of bottom water, accompanied by a decrease in oxygen solubility, and finely dispersed nature of bottom sediments contributed to the fact that the rate of oxygen input was lower than the rate of oxygen consumption for organic matter oxidation. This was followed by the development of oxygen deficiency zones and emergence of reduced compounds, in particular hydrogen sulfide. Importantly, suboxic conditions prevailed in the upper sediment layer, and anaerobic conditions prevailed below. Due to this, the main forms of macrozoobenthos were species tolerant to oxygen deficiency and organic pollution. Specifically, in some spots of the Kazachya Bay, polychaetes alone were recorded. At the same time, in the Kruglaya Bay mouth area, intense water dynamics and morphological peculiarities of bottom sediments contribute to saturation of the upper sediment layer with oxygen. Based on oxygen concentration data for the surface (0–5 mm) sediment layer (pore waters) and on geochemical peculiarities of bottom sediments (moisture and porosity), the oxygen flux at st. 4 (the Solenaya Bay) was calculated; the value was 0.73 M·m−2·year−1. Considering oxygen concentration in bottom water layer (259 μM), the time for complete depletion of oxygen or its renewal is about 5 months if taking into account biogeochemical processes alone. Hence, it can be assumed that the ecosystems of the Kruglaya and Kazachya bays are in the stage of degradation. Their further exploitation without a developed systemic and rational approach will result in a critical deterioration of the ecosystems – the emergence and spread of environmental risk zones. It will reduce the recreational and socioeconomic attractiveness of these areas.

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23

Dodson, Stanley I., and Carol Eunmi Lee. "Recommendations for Taxonomic Submissions to Hydrobiologia." Hydrobiologia 556, no. 1 (February 2006): 1–5. http://dx.doi.org/10.1007/s10750-005-5370-0.

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24

Dumont, H. J. "New: A yearly sediment issue in Hydrobiologia." Hydrobiologia 140, no. 1 (September 1986): 3. http://dx.doi.org/10.1007/bf00006722.

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25

Olin, M. J., M. Rask, J. Ruuhijarvi, J. Keskitalo, J. Horppila, P. Tallberg, T. Taponen, A. Lehtovaara, and I. Sammalkorpi. "Effects of Biomanipulation on Fish and Plankton Communities in Ten Eutrophic Lakes of Southern Finland – Hydrobiologia (2006) 553: 67–88." Hydrobiologia 560, no. 1 (May 2006): 434. http://dx.doi.org/10.1007/s10750-006-0022-6.

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26

HAMILTON, E. "Sediment/water interations (Proceedings of the Fourth International Symposium, Melbourne, Australia, 16–20 February 1987), Kluwer Academic Publishers, Dordrect, 1989, 533 pp. (reprinted from Hydrobiologia, vol. 176/177, 1989)." Science of The Total Environment 103, no. 2-3 (April 15, 1991): 251. http://dx.doi.org/10.1016/0048-9697(91)90158-b.

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27

V. M. Mahajan, S. W. Dafare, and P. P. Thakur. "Hydrobiological Studies and Zooplankton Diversity of Sagar Talao District Bhandara Maharashtra." International Journal of Advanced Research in Science, Communication and Technology, December 31, 2021, 380–83. http://dx.doi.org/10.48175/ijarsct-2404.

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Air, water, land, flora and fauna are the natural resources of any ecosystem. Water is very important for existence of life. It is the medium, which gave birth to first primitive living molecules,as the living organisms found in water are reliable indicators of water quality. The distribution and diversity of zooplankton in aquatic ecosystem depends mainly on the physic-chemical properties of water. For the study of water quality, the limnological observation is needed. Most of the organisms are being extensively used as indicators of water pollution. The biological indicators provide a direct clue and quick information of the aquatic systems. In present study, the zooplankton of the Sagar Talao was studied for a period of one year with its physico chemical factors. In present study total of 09 species of zooplanktons belonging to Rotifera, Ostracoda Cladocera, Copepoda, were present..

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28

Yepremyan, H., V. Asatryan, and M. Dallakyan. "STRUCTURAL CHANGES OF RIVER ECOSYSTEMS’ BIOLOGICAL QUALITY ELEMENTS UNDER CONDITIONS OF MINERAL WATER FLUX." Electronic Journal of Natural Science, May 17, 2022, 20–25. http://dx.doi.org/10.55841/1728-791x-2022.1.38-20.

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The Government of the Republic of Armenia strives to ensure a better management of surface water resources by establishing regular hydrobiological monitoring system in accordance with the EU WFD requirements. However, there is a very limited use of biological quality elements in monitoring of the ecological status of surface waters due in part to a lack of studies on their reflection towards different stressors. Thus, the aim of the study was to estimate the structural changes of benthic macroinvertebrates and macrophytes under the influence of the mineral water flux. The hyperlocal studies have been conducted in the area where the single stressor is mineral water. The results have shown that benthic macro invertebrates are more sensitive towards mineral water flux than macrophytes which allowed also to conclude on the higher efficiency of use of macrophytes in the estimation of water trophic status in case of mixed effects of organic pollution and mineral waters.

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29

"Bio/indication of the Gulf of Finland Kopora Guba Catchment Rivers’ Water Quality." Water sector of Russia: problems, technologies, management, no. 1, 2018 (2018). http://dx.doi.org/10.35567/1999-4508-2018-1-8.

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The results of studies of zooplankton and zoobenthos of the Sista, Voronka and Kovashi rivers related to the catchment area of the Koporskaya Bay of the Gulf of Finland (Leningrad Oblast) are presented, and the quality of river waters is assessed. The composition of hydrobionts species were determined, quantitative indicators and regularities of the seasonal dynamics of the taxonomic structure of communities were revealed. The zooplankton of the investigated rivers by the number of species was represented by rotifers, the proportion of whose number and biomass decreased from spring to autumn due to an increase in the proportion of cladocerans. Zoobenthos of rivers in the spring period was represented mainly by oligochaetes and chironomids, during the summer period the role of mollusks, oligochaetes and caddisflies increased. Differences in the taxonomic composition of the zoobenthos of the studied watercourses were determined by the composition of fouling substrates, morphometry, seasonal structural changes and organic pollution of watercourses. According to hydrobiological indicators the waters of the rivers of the Koporskaya Bay Basin correspond basically to the III class of quality (slightly polluted waters). The trophic type of watercourses varied from eutrophic to hypereutrophic. According to indicators of the saprobity index in most cases the rivers were belonged to the β-mesosaprobic zone. The greatest pollution experienced the Kovashi, especially in the lower reaches. The most «prosperous» river was the Sista.

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30

Gor A, Khachatryan, and Alexander Arakelyan. "Assessment of the Ecological State of the Katnakhbyur River." Journal of Earth and Environmental Sciences Research, April 30, 2022, 1–5. http://dx.doi.org/10.47363/jeesr/2022(4)173.

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The article presents the results of the assessment of the pollution of the Katnakhbyur river. The purpose of this work is to study the ecological state of the river and identify the main pollutants. The article presents an integral assessment of the ecological state of the river based on hydrobiological and hydrochemical indicators. The article uses the method of field research and observations, geographical and descriptive methods. The article compared the results of the analysis of water samples taken from the site of the villages of Armanis and Urasar. For comparison, a section of the Katnakhbyur River in the village of Urasar was adopted as a reference. The results of the analysis of the water sample taken from the site of the village of Armanis show that in comparison with the site of Urasara, there is an increase in a number of metals. The high concentration of heavy metal compounds in this area is due to the impact of the Armanis deposit. The article uses data from the Center for Hydrometeorology and Monitoring of the Ministry of the Environment.

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31

Komulaynen, Sergey F., Igor A. Baryshev, Alexandra N. Kruglova, Yulia L. Slastina, Maksim S. Potakhin, Nataliya E. Galakhina, and Kseniya M. Nikerova. "The Lake Pizanets (Republic of Karelia, Russia) – a new site for establishingthe protected area." Ecosystem Transformation 4, no. 2 (2021). http://dx.doi.org/10.23859/estr-201126.

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A survey of the morphological and hydrological characteristics of the lake and analysis of the species composition, abundance, and biomass of phytoplankton, phytoperiphyton, zooplankton, and zoobenthos were carried out as a part of the complex study for establishing a new protected area “Lake Pizanets”. The effect of natural and anthropogenic factors on the hydrochemical regime and structure of aquatic ecosystems of the lake was assessed. The trophic status of the lake, its saprobity, and the significance of particular communities and bioindication indices were estimated. The species composition and dominant species of the studied communities of the lake were quite typical for freshwater bodies of the region. Despite the fact that the abundance and biomass of macrozoobenthos turned out to be lower than in other lakes of Eastern Fennoscandia, generally, the abundance and biomass of phytoplankton, phytoperiphyton, zooplankton, and zoobenthos evidenced on relatively high degree of their development in the lake Pizanets, as well as on their activity and stability. At the same time, the species, forming the communities, differed in size noticeably; therefore, significant discrepancies were found between the lists of taxa dominating by abundance and by biomass. The biotic indices and hydrochemical indicators indicated mainly a low degree of pollution, so the lake waters could be classified as belonging to water purity class II. Nowadays, the lake is not affected by significant anthropogenic load. However, according to the program of establishing new protected areas, further control of the hydrobiological and hydrochemical indicators of the reservoir, as well as its inclusion in the environmental monitoring program is undoubtful.

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32

Denisenko, Oleg Sergeyevich. "TO THE PROBLEM OF TOTAL EVALUATING OF DREDGING IMPACT ON VARIOUS SYSTEMATIC GROUPS OF AQUATIC BIOLOGICAL RESOURCES OF THE NOVOTROITSK RESERVOIR IN THE STAVROPOL REGION." Vestnik of Astrakhan State Technical University. Series: Fishing industry, June 25, 2019, 33–43. http://dx.doi.org/10.24143/2073-5529-2019-2-33-43.

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The article highlights the poor ecological conditions of the Novotroitsk reservoir in the Stavropol Territory due to its intensive siltation because of the erosion of the banks and riverbed of the Egolik river, forming extensive stagnant zones and waterlogging of individual sections and secondary organic pollution of the reservoir, which necessitated a set of measures for hydromechanical cleaning of the reservoir bottom from silt sediments. There have been given the results of comprehensive studies of the possible impact of dredging by hydro-mechanization using pile-anchor dredger “350-50L” on the aquatic biological resources of the Novotroitsk reservoir. The hydrological, hydrobiological and ichthyological characteristics of the biota of the Novotroitsk reservoir are given, the technological solutions used in the course of dredging are fully described, the influence of the dredging on various systematic groups of hydrobionts of the reservoir is considered. According to the current regulatory legal acts of the Russian Federation in the fisheries and saving aquatic biological resources, there has been carried out calculation of harm caused to the aquatic biological resources. In view of the research results, the main features of the negative impact have been identified and the total amount of harm caused to the aquatic biological resources of the Novotroitsk has been calculated reservoir in natural terms. Using a certified computer model of IMRV “Potok” 1.0 there has been conducted simulation mathematical modeling of propagation and sedimentation of additional turbidity. The values of change variability of the suspended solids concentrations depending on the distance, the integral volumes of suspension tails and redeposition areas of turbidity zones on the bottom of the Novotroitsk reservoir relative to the month of conducting the work and to the seizures of the extracted soil have been calculated. Various compensatory measures for restoration of water bioresource losses have been developed.

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33

Gebler, Daniel, Agnieszka Kolada, Agnieszka Pasztaleniec, and Krzysztof Szoszkiewicz. "Modelling of ecological status of Polish lakes using deep learning techniques." Environmental Science and Pollution Research, September 22, 2020. http://dx.doi.org/10.1007/s11356-020-10731-1.

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Abstract Since 2000, after the Water Framework Directive came into force, aquatic ecosystems’ bioassessment has acquired immense practical importance for water management. Currently, due to extensive scientific research and monitoring, we have gathered comprehensive hydrobiological databases. The amount of available data increases with each subsequent year of monitoring, and the efficient analysis of these data requires the use of proper mathematical tools. Our study challenges the comparison of the modelling potential between four indices for the ecological status assessment of lakes based on three groups of aquatic organisms, i.e. phytoplankton, phytobenthos and macrophytes. One of the deep learning techniques, artificial neural networks, has been used to predict values of four biological indices based on the limited set of the physicochemical parameters of water. All analyses were conducted separately for lakes with various stratification regimes as they function differently. The best modelling quality in terms of high values of coefficients of determination and low values of the normalised root mean square error was obtained for chlorophyll a followed by phytoplankton multimetric. A lower degree of fit was obtained in the networks for macrophyte index, and the poorest model quality was obtained for phytobenthos index. For all indices, modelling quality for non-stratified lakes was higher than this for stratified lakes, giving a higher percentage of variance explained by the networks and lower values of errors. Sensitivity analysis showed that among physicochemical parameters, water transparency (Secchi disk reading) exhibits the strongest relationship with the ecological status of lakes derived by phytoplankton and macrophytes. At the same time, all input variables indicated a negligible impact on phytobenthos index. In this way, different explanations of the relationship between biological and trophic variables were revealed.

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34

Shikhova, T., E. Scopin, and R. Bolshakov. "ZOOINDICATION OF WATER BODIES WITHIN PETROLEUM INDUSTRIAL TERRITORIES OF THE BOLSHEZEMELSKAYA TUNDRA." Transactions of Papanin Institute for Biology of Inland Waters RAS, November 29, 2021, 83–92. http://dx.doi.org/10.47021/0320-3557-2021-83-92.

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Intensive development of the oil and gas industry and accidents on oil pipelines become the reason of the environmental tension in the Pechora River basin (Nenets Autonomous District). Data on changes in water quality in five lakes and a small watercourse in the territory of oil fields of the Bolshezemelskaya tundra are presented. The bioindication indices (Berger-Parker (D), Shannon biodiversity (H '), Woodiwiss (W), Pantle-Buck (S), Balushkina (Kch)) were applied. The assessment of the state of water bodies in the Kolva River Basin (large lakes - Kolvaty and Nercheity), in the Laya River Basin (shallow lakes - Krugloye, Bezymyannoe 1, Bezymyannoe 2, stream) was done. The 28 samples of zoobenthos was processed by the standard method in July 2012 and 2019. A low diversity of benthic invertebrates was revealed for 5–20 taxa of the rank of families and orders. During the considered period, the changes have occurred in the structure and composition of the zoobenthos of water bodies. In 2019, the species diversity decreased in Kolvaty Lake (H'<2). There are no species of the crustacean complex (Monoporeia affinis, Mesocyclops leuckarti, Heterocope borealis) and larvae of Trichoptera. Only Sphaeriidae and Chironomidae with a predominance of Psectrocladius psilopterus (D = 55%) were recorded. The species diversity in Nercheity Lake increased (H'> 2) with a change in the dominant taxa: the larvae of the chironomids Ablabesmyia monilis (D = 44%) were found in 2012, the lower crustaceans (D = 47–51%) - in 2019. However, according to the totality of hydrobiological indicators, the quality of water in the lakes of the Kolva River Basin in 2019 compared to 2012 did not change significantly. The quality of water in the Krugloye and Bezymyannoe 1, Bezymyannoe 2 lakes (the Laya River Basin) has improved that is confirmed by a significant increase of species diversity. The most characteristic groups of benthic communities in these lakes are lower crustaceans (Cladocera, Copepoda, Ostracoda) and Chironomidae. The indicators of clean waters are o-β-mesosaprobic species Cladocera, Copepoda Heterocope appendiculata, Heterocope borealis (in the oligotrophic lakes), caddisfly Limnephilus stigma (in the Krugloe Lake), rotifer Polyarthra euryptera (in the Bezymyannoe 2 Lake), mayfly larvae Centroptilum luteolum. More resistant to organic pollution Copepoda began to prevail in abundance and diversity in Bezymyannoe 1 and Bezymyannoe 2 lakes, with a decrease in the taxonomic composition of Cladocera, which indicates the eutrophication of these water bodies. In most lakes, the water corresponds to the III quality class ("moderate pollution"), but in the Kolvaty lake and in the Bezymyanny stream (the Laya River basin) was recorded the biogenic pollution. Totally, insignificant taxonomic changes in zoobenthos structure took place in the lakes and the state of water bodies of the surveyed tundra remains relatively stable.

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35

"Hydrobiologia." Hydrobiologia 567, no. 1 (September 2006): v—vii. http://dx.doi.org/10.1007/s10750-006-2000-4.

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36

"Hydrobiologia." Hydrobiologia 558, no. 1 (March 2006): v—vi. http://dx.doi.org/10.1007/s10750-005-1400-1.

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37

"Hydrobiologia." Hydrobiologia 562, no. 1 (June 2006): v—vi. http://dx.doi.org/10.1007/s10750-005-1800-2.

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38

"Hydrobiologia." Hydrobiologia 565, no. 1 (July 2006): v—vii. http://dx.doi.org/10.1007/s10750-005-1900-z.

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39

"Regional environmental programs of Dnipropetrovsk region: analysis, mapping, degree of implementation." Geographical Education and Cartography, no. 27 (2018). http://dx.doi.org/10.26565/2075-1893-2018-27-05.

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The article is devoted to the geographical analysis of environmental problems and regional targeted environmental programs implemented in Dnipropetrovsk region. Geographical location, natural resources and human potential of the region contribute to the development of large enterprises in the extractive, metallurgical and chemical industries, which relate not only to material and energy-intensive industries, but also to environmentally hazardous facilities. As a result of the analysis, groups of environmental problems in the region were identified. Among them, the main ones are: pollution of the atmosphere and hydrosphere; violation of the natural water and hydrobiological regime of rivers; formation and accumulation of large volumes of industrial and domestic waste; storage of radioactive waste on the territory of the region and urban agglomerations; spread of dangerous exogenous geological processes; protection, use and reproduction of wild fauna and flora and a low level of conservation. These types of environmental problems are inherent in other regions, but in Dnipropetrovsk region they are of a higher level and therefore require special attention. It especially concerns accumulation of huge volumes of industrial wastes, including toxic wastes, as well as the storage of large volumes of radioactive waste on the territory of the Dnieper-Kamyansk agglomeration, which are a threat to the health of millions of people. It has been established that the largest number of nature protection measures is implemented within the framework of the program for eliminating the consequences of territorial flooding, but the largest amounts of funding are provided for under the solid waste management program. In the framework of these programs, nature protection activities are financed mainly from regional funds (48-50%), while other sources account for almost 30%. Environmental protection measures implemented in the region are grouped into five groups: organizational and management; engineering; engineering-geological; bio-meliorative; educational. A series of maps reflecting the severity of environmental problems in the region, the amount of funding and the degree of environmental measures implementation has been created. The study shows that the environmental situation in the region has improved both due to the implementation of regional environmental programs, and reduction of the negative impact on the environment due to a decrease in industrial production. Inadequate financing of environmental measures is exacerbated by the lack of a systematic approach to solving environmental problems of different nature and level.

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40

"Book reviews in Hydrobiologia." Hydrobiologia 297, no. 3 (February 1995): 251–56. http://dx.doi.org/10.1007/bf00019289.

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41

"Hydrobiologia volume 215, contents." Hydrobiologia 215, no. 3 (1991): i. http://dx.doi.org/10.1007/bf00764862.

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42

"Hydrobiologia volume 209, contents." Hydrobiologia 209, no. 3 (February 1991): i. http://dx.doi.org/10.1007/bf00015349.

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43

"hydrobiologia volume 245 (1992), contents." Hydrobiologia 245, no. 3 (October 1992): i. http://dx.doi.org/10.1007/bf00006161.

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44

"hydrobiologia volume 288 (1994), contents." Hydrobiologia 288, no. 3 (August 1994): 197. http://dx.doi.org/10.1007/bf00006243.

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45

"Hydrobiologia volume 226 (1991), contents." Hydrobiologia 226, no. 3 (November 1991): 193. http://dx.doi.org/10.1007/bf00006860.

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46

"Hydrobiologia volume 277 (1994), contents." Hydrobiologia 277, no. 3 (March 1994): 199. http://dx.doi.org/10.1007/bf00007302.

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47

"Hydrobiologia volume 215, author index." Hydrobiologia 215, no. 3 (1991): ii. http://dx.doi.org/10.1007/bf00764863.

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48

"Hydrobiologia volume 209, author index." Hydrobiologia 209, no. 3 (February 1991): ii. http://dx.doi.org/10.1007/bf00015350.

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49

"Hydrobiologia volume 306 (1995), contents." Hydrobiologia 306, no. 3 (June 1995): 265–66. http://dx.doi.org/10.1007/bf00017699.

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50

"hydrobiologia volume 231 (1992), contents." Hydrobiologia 231, no. 3 (April 1992): i. http://dx.doi.org/10.1007/bf00018204.

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