Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i4.10
S. Afanasyev
Paper deals with impact of hostilities on hydroecosystems of Ukraine. The main types of impacts in different river basins and their effects are considered. The algorithm of measures was proposed aimed at development of technologies and recommendations for rehabilitation of the ecological state and biodiversity in the damaged water bodies over the wartime and after-war reconstruction.
{"title":"Impact of War on Hydroecosystems of Ukraine: Conclusion of the First Year of the Full-Scale Invasion of Russia (a Review)","authors":"S. Afanasyev","doi":"10.1615/hydrobj.v59.i4.10","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i4.10","url":null,"abstract":"Paper deals with impact of hostilities on hydroecosystems of Ukraine. The main types of impacts in different river basins and their effects are considered. The algorithm of measures was proposed aimed at development of technologies and recommendations for rehabilitation of the ecological state and biodiversity in the damaged water bodies over the wartime and after-war reconstruction.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67523409","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i4.30
V. Medved
The distribution of phytoplankton pigment characteristics (Сchl a+b+c/Cchl a, Cchl b/Cchl a, Cchl c/Cchl a, Cchl a/Cchl b, Cchl a/Cchl c, Cpheo a, Cchl a/Cpheo a, Ccar/Cchl a, and E480/E664 and E430/E664) in 19 lakes located within the territory of Kyiv is discussed in the paper. The studied lakes differ in their origin, hydrological conditions, and also in the level of anthropogenic load. It has been found that changes in relationship between various groups of pigments correlate with changes in phytoplankton structure. The given pigment indices can be used in assessing the structure of algal communities, the physiological state of algae, their quantitative development, and the ecological state of water bodies.
{"title":"Phytoplankton Spectral Pigment Indices in the Lakes of the City of Kyiv","authors":"V. Medved","doi":"10.1615/hydrobj.v59.i4.30","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i4.30","url":null,"abstract":"The distribution of phytoplankton pigment characteristics (С<sub>chl <i>a+b+c</i></sub>/C<sub>chl<i> a</i>, </sub> C<sub>chl<i> b</i></sub>/C<sub>chl<i> a</i></sub>, C<sub>chl<i> c</i></sub>/C<sub>chl <i>a</i></sub>, C<sub>chl <i>a</i></sub>/C<sub>chl <i>b</i></sub>, C<sub>chl <i>a</i></sub>/C<sub>chl <i>c</i>, </sub> C<sub>pheo <i>a</i></sub>, C<sub>chl <i>a</i></sub>/C<sub>pheo <i>a</i></sub>, C<sub>car</sub>/C<sub>chl <i>a</i></sub>, and E<sub>480</sub>/E<sub>664</sub> and E<sub>430</sub>/E<sub>664</sub>) in 19 lakes located within the territory of Kyiv is discussed in the paper. The studied lakes differ in their origin, hydrological conditions, and also in the level of anthropogenic load. It has been found that changes in relationship between various groups of pigments correlate with changes in phytoplankton structure. The given pigment indices can be used in assessing the structure of algal communities, the physiological state of algae, their quantitative development, and the ecological state of water bodies.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67523426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i1.10
T. V. Dvoreckiy, V. V. Gubanov
Over the season of 2020, the vegetation dynamics of the wetlands in the Lower Dniester National Nature Park were examined using the indices NDVI (Normalized Difference Vegetation Index) and VCI (Vegetation Condition Index) on the basis of Landsat-8 satellite remote sensing data. The results demonstrated that distribution of values throughout the vegetation season did not correspond to normal distribution, indicating variety of their habitat conditions. The vegetation development in spring was negatively affected by the pyrogenic factor, which formed some areas without vegetation and with poorly developed vegetation. Sharp increase in NDVI values in early summer occurred due to development of wetland ecosystems' edifier Phragmites australis, whose stems emerged from the pickle stage and developed a leaf lamina. In this period, the well-developed vegetation prevailed, its total area exceeded 97%. In autumn, the areas of the developed vegetation gradually decrease, whereas areas of the poorly developed increased. The results of the research showed effectiveness of remote sensing of wetland areas using NDVI and VCI to assess vegetation state; it also can be used for the purposes of the conservation, restoration and sustainable use of wetland ecosystems of the north-west Black Sea coastal area under increasing anthropogenic pressure and global climate change.
基于Landsat-8卫星遥感数据，采用归一化植被指数(NDVI)和植被状况指数(VCI)对下德涅斯特国家自然公园(Lower Dniester National Nature Park)湿地的植被动态进行了研究。结果表明:各植被季值的分布不符合正态分布，表明生境条件的多样性;春季植被发育受到热原因子的不利影响，形成了部分无植被和植被发育不良的区域。初夏NDVI值急剧上升是由于湿地生态系统的育成植物芦苇(Phragmites australis)的发育，芦苇的茎从榨菜期发育出叶层。这一时期植被发育良好，总面积超过97%。秋季，植被发达区逐渐减少，欠发达区逐渐增加。研究结果表明:利用NDVI和VCI对湿地区域进行遥感植被状态评价是有效的;它还可用于在日益增加的人为压力和全球气候变化的情况下保护、恢复和可持续利用黑海西北沿海地区的湿地生态系统。
{"title":"Seasonal Dynamics of Vegetation in the Wetlands of the Lower Dniester NNP Based on Remote Data from the Landsat-8 Satellite","authors":"T. V. Dvoreckiy, V. V. Gubanov","doi":"10.1615/hydrobj.v59.i1.10","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i1.10","url":null,"abstract":"Over the season of 2020, the vegetation dynamics of the wetlands in the Lower Dniester National Nature Park were examined using the indices NDVI (Normalized Difference Vegetation Index) and VCI (Vegetation Condition Index) on the basis of Landsat-8 satellite remote sensing data. The results demonstrated that distribution of values throughout the vegetation season did not correspond to normal distribution, indicating variety of their habitat conditions. The vegetation development in spring was negatively affected by the pyrogenic factor, which formed some areas without vegetation and with poorly developed vegetation. Sharp increase in NDVI values in early summer occurred due to development of wetland ecosystems' edifier Phragmites australis, whose stems emerged from the pickle stage and developed a leaf lamina. In this period, the well-developed vegetation prevailed, its total area exceeded 97%. In autumn, the areas of the developed vegetation gradually decrease, whereas areas of the poorly developed increased. The results of the research showed effectiveness of remote sensing of wetland areas using NDVI and VCI to assess vegetation state; it also can be used for the purposes of the conservation, restoration and sustainable use of wetland ecosystems of the north-west Black Sea coastal area under increasing anthropogenic pressure and global climate change.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522105","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i2.20
Yu. F. Hromova, I. I. Abram'yuk
Zoo- and ichthyoplankton in the littoral zone of various water bodies of the lower reaches of the Desna River occurring in the communities of aquatic plants essentially differed from those registered in the adjacent sections free of vegetation. The complicated structure of the environment formed by aquatic plants was responsible for higher taxonomic richness, numbers, and biomass of zooplankton communities compared to the shallow water zone free of vegetation. It should be noted that this phenomenon was observed in early summer as well during the period of ichthyoplankton mass development, which is indicative of the sufficient food base. The highest quantitative indices of zooplankton development were registered in multispecies communities of aquatic plants in floodplain water bodies especially under lentic conditions unlike those occurring in mono-species communities of macrophytes observed in the main riverbed of the Desna River, the development of which was limited by high current velocity. Ichthyoplankton was also registered mainly in macrophyte communities. Its highest species richness, quantitative indices, and the number of size-age groups were observed in the communities of aquatic plants in the semi-flow floodplain water body hydraulically connected to the main riverbed.
{"title":"Zoo- and Ichthyoplankton in the Communities of Aquatic Plants and in the Adjacent Sections of the Littoral Zone of Various Water Bodies in the Lower Reaches of the Desna River","authors":"Yu. F. Hromova, I. I. Abram'yuk","doi":"10.1615/hydrobj.v59.i2.20","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i2.20","url":null,"abstract":"Zoo- and ichthyoplankton in the littoral zone of various water bodies of the lower reaches of the Desna River occurring in the communities of aquatic plants essentially differed from those registered in the adjacent sections free of vegetation. The complicated structure of the environment formed by aquatic plants was responsible for higher taxonomic richness, numbers, and biomass of zooplankton communities compared to the shallow water zone free of vegetation. It should be noted that this phenomenon was observed in early summer as well during the period of ichthyoplankton mass development, which is indicative of the sufficient food base. The highest quantitative indices of zooplankton development were registered in multispecies communities of aquatic plants in floodplain water bodies especially under lentic conditions unlike those occurring in mono-species communities of macrophytes observed in the main riverbed of the Desna River, the development of which was limited by high current velocity. Ichthyoplankton was also registered mainly in macrophyte communities. Its highest species richness, quantitative indices, and the number of size-age groups were observed in the communities of aquatic plants in the semi-flow floodplain water body hydraulically connected to the main riverbed.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"47 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522470","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i3.70
O. Volkova, V. V. Belyaev, V. Skyba, S. Pryshlyak
The role of helophytes in 137Cs migration into various components of aquatic ecosystems of different types was investigated. It has been found that 74-87% of 137Cs total storage in the phytomass was registered in the underground organs of Phragmites australis and 61-86% - in the underground organs of . As a result of dying away of the aboveground organs of helophytes, 5-11% of 137Cs total content in the phytomass can income into the water due to the release of the exchanged forms of the radionuclide. In this case, 8-31% of 137Cs will remain in the detritus. Annually as a result of dying away of the above-ground and underground organs of helophytes, 53-85% of 137Cs accumulated in the phytomass incomes into the bottom sediments. In this case, 9-19% of 137Cs remains in the wintering rhizomes. The activity of 137Cs accumulated in helophytes is not more than 6% of its content in bottom sediments occupied by plant communities. After helophytes dying away, secondary contamination of the water with 137Cs can attain 0.4% of its activity in bottom sediments occupied by plant communities, about 1.1% can income into the detritus, and 4.2% - into the bottom sediments.
{"title":"Parameters of 137 Cs Migration into the Bottom Sediments of Various Water Bodies as a Result of Phragmites australis and Typha angustifolia Dying Away","authors":"O. Volkova, V. V. Belyaev, V. Skyba, S. Pryshlyak","doi":"10.1615/hydrobj.v59.i3.70","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i3.70","url":null,"abstract":"The role of helophytes in <sup>137</sup>Cs migration into various components of aquatic ecosystems of different types was investigated. It has been found that 74-87% of <sup>137</sup>Cs total storage in the phytomass was registered in the underground organs of <i>Phragmites australis</i> and 61-86% - in the underground organs of <i.Typha angustifolia</i>. As a result of dying away of the aboveground organs of helophytes, 5-11% of <sup>137</sup>Cs total content in the phytomass can income into the water due to the release of the exchanged forms of the radionuclide. In this case, 8-31% of <sup>137</sup>Cs will remain in the detritus. Annually as a result of dying away of the above-ground and underground organs of helophytes, 53-85% of <sup>137</sup>Cs accumulated in the phytomass incomes into the bottom sediments. In this case, 9-19% of <sup>137</sup>Cs remains in the wintering rhizomes. The activity of <sup>137</sup>Cs accumulated in helophytes is not more than 6% of its content in bottom sediments occupied by plant communities. After helophytes dying away, secondary contamination of the water with <sup>137</sup>Cs can attain 0.4% of its activity in bottom sediments occupied by plant communities, about 1.1% can income into the detritus, and 4.2% - into the bottom sediments.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i2.50
R. Novitskyi, L. Manilo, V. Peskov, V. Gasso
The ratan goby Ponticola ratan (Nordmann, 1840) is known as an inhabitant of the marine and brackish waters of the Black Sea, the Sea of Azov and the Caspian Sea. The paper presents data on its recent records in the freshwaters of Ukraine. The morphological features of the ratan goby in freshwater habitats were studied for the first time. Certain differences in morphological features between specimens from the freshwater and marine populations were revealed, probably reflecting adaptation to new freshwater habitats, characterized by more turbid water and other specter of available food. The records of mature specimens in the Dniprovske and Kaniv Reservoirs indicate its active progression upstream the Dnieper River, which enabled to confirm that the species should be considered both euryhaline and amphidromous. At the same time, low abundance of P. ratan in the Dnieper River enabled to consider its status in the fresh waters of Ukraine not as invasive but alien.
{"title":"Spread and Ecomorphological Modifications of Ratan Goby Ponticola ratan (Gobiiformes: Gobiidae) in the Dnieper Reservoirs (Ukraine)","authors":"R. Novitskyi, L. Manilo, V. Peskov, V. Gasso","doi":"10.1615/hydrobj.v59.i2.50","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i2.50","url":null,"abstract":"The ratan goby Ponticola ratan (Nordmann, 1840) is known as an inhabitant of the marine and brackish waters of the Black Sea, the Sea of Azov and the Caspian Sea. The paper presents data on its recent records in the freshwaters of Ukraine. The morphological features of the ratan goby in freshwater habitats were studied for the first time. Certain differences in morphological features between specimens from the freshwater and marine populations were revealed, probably reflecting adaptation to new freshwater habitats, characterized by more turbid water and other specter of available food. The records of mature specimens in the Dniprovske and Kaniv Reservoirs indicate its active progression upstream the Dnieper River, which enabled to confirm that the species should be considered both euryhaline and amphidromous. At the same time, low abundance of P. ratan in the Dnieper River enabled to consider its status in the fresh waters of Ukraine not as invasive but alien.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"47 10 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522695","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i3.30
O. V. Romanenko, Y. Krot, Yu. M. Krasyuk, I. Konovets
The paper deals with adaptive reactions of the freshwater bivalve mollusks of the family Unionidae under water temperature increase to the critical values in the model ecosystem - the microcosm. It was found that the water temperature increase resulted in changes of the metabolic processes, namely decrease of the total protein and glycogen content in gills of Unio tumidus and U. pictorum. Under critical temperatures (30±0.5°C), high activity of LDHase and decrease of K+/Na+-ATPase activity was registered, as well as increase of the filtration rate and oxygen consumption. Considerable need for oxygen was conditioned by oxidation of the energy substrates for instant production of energy for the adaptive processes. However, prolonged impact of increased temperature and thus high rate of metabolic processes in the mollusks can result in exhaustion of the energy resources available for key biological processes, such as growth and reproduction. These results confirmed that over the water temperatures rise owing to the global climate change, many populations of the freshwater bivalves can appear dangerously close to the upper limit of the thermal tolerance.
{"title":"Peculiarities of Unio tumidus and Unio Pictorum (Unionidae) Adaptive Reactions to the Water Temperature Increase in the Microcosm","authors":"O. V. Romanenko, Y. Krot, Yu. M. Krasyuk, I. Konovets","doi":"10.1615/hydrobj.v59.i3.30","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i3.30","url":null,"abstract":"The paper deals with adaptive reactions of the freshwater bivalve mollusks of the family Unionidae under water temperature increase to the critical values in the model ecosystem - the microcosm. It was found that the water temperature increase resulted in changes of the metabolic processes, namely decrease of the total protein and glycogen content in gills of Unio tumidus and U. pictorum. Under critical temperatures (30±0.5°C), high activity of LDHase and decrease of K+/Na+-ATPase activity was registered, as well as increase of the filtration rate and oxygen consumption. Considerable need for oxygen was conditioned by oxidation of the energy substrates for instant production of energy for the adaptive processes. However, prolonged impact of increased temperature and thus high rate of metabolic processes in the mollusks can result in exhaustion of the energy resources available for key biological processes, such as growth and reproduction. These results confirmed that over the water temperatures rise owing to the global climate change, many populations of the freshwater bivalves can appear dangerously close to the upper limit of the thermal tolerance.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i3.50
V. Martseniuk, M. Prychepa, O. Marenkov
The paper deals with impact of toxic pollution on activity of energy and ion exchange enzymes in roach and perch. Significant changes in content of energy substrates in liver, gills and muscles of perch and roach were established depending on season and toxic load. The glycogen content in liver of perch specimens from the polluted lake (Kyrilivske) was lower than in specimens from the control lake (Babyne). Also, lower activity of SDH in muscles and gills of roach has been established. It should be noted that roach was characterized by higher variability of the studied enzymes' activity. This indicates the species specificity of the metabolic reactions of the studied fishes to counteract toxic pollution.
{"title":"Changes of Activity of Energy and Ion Exchange Enzymes and the Energy Substrates Content in Tissues of Perca fluviatilis and Rutilus rutilus under Toxic Water Pollution","authors":"V. Martseniuk, M. Prychepa, O. Marenkov","doi":"10.1615/hydrobj.v59.i3.50","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i3.50","url":null,"abstract":"The paper deals with impact of toxic pollution on activity of energy and ion exchange enzymes in roach and perch. Significant changes in content of energy substrates in liver, gills and muscles of perch and roach were established depending on season and toxic load. The glycogen content in liver of perch specimens from the polluted lake (Kyrilivske) was lower than in specimens from the control lake (Babyne). Also, lower activity of SDH in muscles and gills of roach has been established. It should be noted that roach was characterized by higher variability of the studied enzymes' activity. This indicates the species specificity of the metabolic reactions of the studied fishes to counteract toxic pollution.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67522956","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i4.70
P. M. Lynnyk
The article deals with problem of the fresh waters salinization in view of its relevance for normal functioning of the aquatic ecosystems, development of different branches of industry and agriculture, and human health. Attention is focused on the fact that the fresh waters' salinization inevitably results in decrease of the ecosystem services scope. The main factors and anthropogenic sources of influence on total dissolved solids in the fresh waters and metamorphosis of their ion composition are considered. It is stated that climate changes potentially affect and will affect the surface waters mineralization in future owing to volume and frequency of the atmospheric precipitation, intensity of the rocks and minerals weathering, the ground feeding of the rivers, the marine water penetration into the estuaries along with reducing of the river water yield, etc. The possible impact of mineralization changes on migration of substances from bottom sediments into the water thickness, that is on the intensity of its secondary pollution, is discussed. This impact can be direct and indirect. First of all, it concerns the migration ability of metals in bottom sediments. Elevated content of Na+, Ca2+ and Mg2+ in water intensifies migration of metals of the exchangeable fraction of bottom sediments. The indirect effect of elevated mineralization is expressed in the oxygen regime of the water bodies, which usually deteriorates in the near-bottom water layers of deep lakes and reservoirs, mouth areas of the rivers and estuaries. The dissolved oxygen deficit becomes usual, anoxic conditions are formed, which favor release of Fe(III) and Mn(IV) from oxyhydroxides or the oxide fraction of the bottom sediments. A review also considers some aspects of potential impact of the fresh waters salinization on survival of the aquatic plants and animals and biodiversity.
{"title":"Potential Impact of Climate Change on Mineralization and Main Ions Ratio in Surface Fresh Waters (a Review)","authors":"P. M. Lynnyk","doi":"10.1615/hydrobj.v59.i4.70","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i4.70","url":null,"abstract":"The article deals with problem of the fresh waters salinization in view of its relevance for normal functioning of the aquatic ecosystems, development of different branches of industry and agriculture, and human health. Attention is focused on the fact that the fresh waters' salinization inevitably results in decrease of the ecosystem services scope. The main factors and anthropogenic sources of influence on total dissolved solids in the fresh waters and metamorphosis of their ion composition are considered. It is stated that climate changes potentially affect and will affect the surface waters mineralization in future owing to volume and frequency of the atmospheric precipitation, intensity of the rocks and minerals weathering, the ground feeding of the rivers, the marine water penetration into the estuaries along with reducing of the river water yield, etc. The possible impact of mineralization changes on migration of substances from bottom sediments into the water thickness, that is on the intensity of its secondary pollution, is discussed. This impact can be direct and indirect. First of all, it concerns the migration ability of metals in bottom sediments. Elevated content of Na+, Ca2+ and Mg2+ in water intensifies migration of metals of the exchangeable fraction of bottom sediments. The indirect effect of elevated mineralization is expressed in the oxygen regime of the water bodies, which usually deteriorates in the near-bottom water layers of deep lakes and reservoirs, mouth areas of the rivers and estuaries. The dissolved oxygen deficit becomes usual, anoxic conditions are formed, which favor release of Fe(III) and Mn(IV) from oxyhydroxides or the oxide fraction of the bottom sediments. A review also considers some aspects of potential impact of the fresh waters salinization on survival of the aquatic plants and animals and biodiversity.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67523062","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2023-01-01DOI: 10.1615/hydrobj.v59.i6.70
V. A. Zhezherya, T. P. Zhezherya, P. M. Linnik, V. P. Osipenko
The results of experimental investigations of the influence of water temperature on the migration of nutrients, organic matter, and metals from bottom sediments into the aquatic environment are discussed in the paper. It has been found that the increase in water temperature from 5°C to 15°C resulted in the increase in the concentration of inorganic nitrogen, inorganic and total phosphorus, and dissolved silicon respectively by a factor of 1.6, 1.1, 1.2, and 1.4. The increase in water temperature from 5°C to 25°C resulted in the increase in the content of these nutrients by a factor of 1.8, 5.8, 1.9, and 2.5. Water temperature increase influenced the contribution of nitrogen compounds to the total balance of inorganic nitrogen. A relative content of ammonium decreased, whereas the contribution of nitrite- and nitrate ions increased as a result of the process of nitrification. The concentration of readily oxidized organic matter and the total content of organic matter also increased almost by a factor of 1.6 with increasing water temperature from 5°C to 25°C. Under such conditions, the concentration of aluminum, manganese, and chromium increased by a factor of 1.9, 3.2, and 2.0. In this case, the content of iron and copper remained almost unchanged due to their occurrence in inaccessible fractions of bottom sediments. Artificial aeration at 25°C was responsible for an insignificant decrease in the concentration of inorganic nitrogen, inorganic and total phosphorus, dissolved organic matter, and also of dissolved aluminum, manganese, and chromium. It has been found that water temperature increase results in the migration of the studied chemical compounds from bottom sediments. However, this process is not as intensive as, for example, with a deficiency of dissolved oxygen and a decrease in pH and redox potential in the near-bottom layer of water.
{"title":"Experimental Simulation of the Influence of Temperature on the Migration of Substances from Bottom Sediments","authors":"V. A. Zhezherya, T. P. Zhezherya, P. M. Linnik, V. P. Osipenko","doi":"10.1615/hydrobj.v59.i6.70","DOIUrl":"https://doi.org/10.1615/hydrobj.v59.i6.70","url":null,"abstract":"The results of experimental investigations of the influence of water temperature on the migration of nutrients, organic matter, and metals from bottom sediments into the aquatic environment are discussed in the paper. It has been found that the increase in water temperature from 5&deg;C to 15&degC resulted in the increase in the concentration of inorganic nitrogen, inorganic and total phosphorus, and dissolved silicon respectively by a factor of 1.6, 1.1, 1.2, and 1.4. The increase in water temperature from 5&degC to 25&degC resulted in the increase in the content of these nutrients by a factor of 1.8, 5.8, 1.9, and 2.5. Water temperature increase influenced the contribution of nitrogen compounds to the total balance of inorganic nitrogen. A relative content of ammonium decreased, whereas the contribution of nitrite- and nitrate ions increased as a result of the process of nitrification. The concentration of readily oxidized organic matter and the total content of organic matter also increased almost by a factor of 1.6 with increasing water temperature from 5&degC to 25&degC. Under such conditions, the concentration of aluminum, manganese, and chromium increased by a factor of 1.9, 3.2, and 2.0. In this case, the content of iron and copper remained almost unchanged due to their occurrence in inaccessible fractions of bottom sediments. Artificial aeration at 25&degC was responsible for an insignificant decrease in the concentration of inorganic nitrogen, inorganic and total phosphorus, dissolved organic matter, and also of dissolved aluminum, manganese, and chromium. It has been found that water temperature increase results in the migration of the studied chemical compounds from bottom sediments. However, this process is not as intensive as, for example, with a deficiency of dissolved oxygen and a decrease in pH and redox potential in the near-bottom layer of water.","PeriodicalId":39692,"journal":{"name":"Hydrobiological Journal","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135800404","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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