Pub Date : 2024-05-24DOI: 10.1134/s199508292402010x
R. A. Mikhailov, V. N. Nesterov, A. V. Rakhuba
Abstract
The relationship between the ecological conditions in water bodies experiencing varying degrees of anthropogenic impact and the composition of total lipids and fatty acids (FAs) of individual organs and tissues (liver and foot) and the whole body of the freshwater snail Limnaea stagnalis has been studied. The lake located within the city limits is subject to various types of pollution, and the lake located within a specially protected natural area is clean. The composition and content of total lipids and fatty acids in mollusks changes depending on the ecological conditions in the lakes. Their maximum content was detected in the digestive gland. The dominant lipids in the organs and tissues of the mollusks in the studied lakes are phosphatidylcholine and phosphatidylethanolamine, and polyunsaturated acids predominate in the FA composition. The changes in the content of lipids and FAs of L. stagnalis are probably due to the high concentrations of organic compounds and heavy metals.
{"title":"Lipid Profile of the Great Pond Snail Lymnaea stagnalis (Mollusca: Gastropoda) in Lakes with Different Degrees of Anthropogenic Pollution","authors":"R. A. Mikhailov, V. N. Nesterov, A. V. Rakhuba","doi":"10.1134/s199508292402010x","DOIUrl":"https://doi.org/10.1134/s199508292402010x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The relationship between the ecological conditions in water bodies experiencing varying degrees of anthropogenic impact and the composition of total lipids and fatty acids (FAs) of individual organs and tissues (liver and foot) and the whole body of the freshwater snail <i>Limnaea stagnalis</i> has been studied. The lake located within the city limits is subject to various types of pollution, and the lake located within a specially protected natural area is clean. The composition and content of total lipids and fatty acids in mollusks changes depending on the ecological conditions in the lakes. Their maximum content was detected in the digestive gland. The dominant lipids in the organs and tissues of the mollusks in the studied lakes are phosphatidylcholine and phosphatidylethanolamine, and polyunsaturated acids predominate in the FA composition. The changes in the content of lipids and FAs of <i>L. stagnalis</i> are probably due to the high concentrations of organic compounds and heavy metals.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"52 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141151580","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-24DOI: 10.1134/s1995082924020147
S. Ye. Sadogurskiy, T. V. Belich, S. A. Sadogurskaya
Abstract
The study of the macrophytobenthos annual cycle of the aquatic component in the Cape Martyan Reserve has revealed that sporophytes of the invasive transforming species Bonnemaisonia hamifera Hariot (Trailliella phase) that had successfully naturalized in coastal waters off the southern coast of Crimea (SCC) abundantly form specialized organs of asexual reproduction. Mature tetrasporangia have been registered at every phytal zone in autumn. Their morphology and morphometry, which are of an important diagnostic value, have been identified and measured. It has been found that all thalli cells, except for apical ones, could develop into sporangia, with the maximum number being formed in the terminal branches, with the most common rows of up to 3–4 pcs. Considering that the formation of tetrasporangia occurs only in a narrow range of light–temperature conditions of a short autumn and spring day, we have showed that, in the SCC, the favorable period for this process lasts from the first decade of October to the second decade of December. In spring, in the rather deep open water areas near the SCC, under modern climatic conditions, the formation of tetrasporangia is limited by water temperature, so its occurrence is unlikely. However, in relatively isolated shallow bays and lagoons, typical for other coastal regions of the Azov–Black Sea basin, it is possible due to local water temperature rise in the first half of March. Still, the ability of sporophyte thalli to vegetatively reproduce by forming an unlimited number of fragments that retain their viability and potential for further fragmentation, seems to be the key factor ensuring the availability and rapid spread of B. hamifera in the SCC and in the whole Azov–Black Sea region.
{"title":"Reproduction of the Invasive Species Bonnemaisonia hamifera Hariot near the Southern Coast of Crimea (Black Sea)","authors":"S. Ye. Sadogurskiy, T. V. Belich, S. A. Sadogurskaya","doi":"10.1134/s1995082924020147","DOIUrl":"https://doi.org/10.1134/s1995082924020147","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study of the macrophytobenthos annual cycle of the aquatic component in the Cape Martyan Reserve has revealed that sporophytes of the invasive transforming species <i>Bonnemaisonia hamifera</i> Hariot (<i>Trailliella</i> phase) that had successfully naturalized in coastal waters off the southern coast of Crimea (SCC) abundantly form specialized organs of asexual reproduction. Mature tetrasporangia have been registered at every phytal zone in autumn. Their morphology and morphometry, which are of an important diagnostic value, have been identified and measured. It has been found that all thalli cells, except for apical ones, could develop into sporangia, with the maximum number being formed in the terminal branches, with the most common rows of up to 3–4 pcs. Considering that the formation of tetrasporangia occurs only in a narrow range of light–temperature conditions of a short autumn and spring day, we have showed that, in the SCC, the favorable period for this process lasts from the first decade of October to the second decade of December. In spring, in the rather deep open water areas near the SCC, under modern climatic conditions, the formation of tetrasporangia is limited by water temperature, so its occurrence is unlikely. However, in relatively isolated shallow bays and lagoons, typical for other coastal regions of the Azov–Black Sea basin, it is possible due to local water temperature rise in the first half of March. Still, the ability of sporophyte thalli to vegetatively reproduce by forming an unlimited number of fragments that retain their viability and potential for further fragmentation, seems to be the key factor ensuring the availability and rapid spread of <i>B. hamifera</i> in the SCC and in the whole Azov–Black Sea region.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"78 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141151562","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-05-24DOI: 10.1134/s1995082924020123
A. A. Payuta, E. A. Flerova, D. A. Guldina, A. S. Kliuchnikov, V. T. Komov, N. V. Lobus
Abstract
The main chemical composition and content of mercury in the muscles of freshwater fish species Xenentodoncancila, Notopterus notopterus, Anabas testudineus, Channa striata, Ch. gachua, and Clarias batrachus from the Cái River in Southern Vietnam, as well as their body sizes, have been studied. The trend of the more intensive accumulation of mercury, protein, and lipids in the muscle tissue of females when compared with males was revealed. A significant relationship between the content of mercury and body size, as well as the content of mercury and the proportion of protein in the muscles, has not been established in most of the studied individuals. Trophic patterns of mercury accumulation in fish muscles has been confirmed: its content increases from euryphages to zoophages (facultative predators). An exception is the euryphage Clarias batrachus, which surpasses many facultative predators in mercury content. It is shown that individuals of the same species living in the biotopes of the Cái River with different hydrodynamic and hydrochemical conditions differ in weight, length, content of protein, lipids, and mercury in muscle tissue.
{"title":"Relationship of Size and Mass Characteristics, Indicators of Metabolism, and Mercury Concentration in the Muscle Tissue of Freshwater Fish from Tropical Vietnam","authors":"A. A. Payuta, E. A. Flerova, D. A. Guldina, A. S. Kliuchnikov, V. T. Komov, N. V. Lobus","doi":"10.1134/s1995082924020123","DOIUrl":"https://doi.org/10.1134/s1995082924020123","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The main chemical composition and content of mercury in the muscles of freshwater fish species <i>Xenentodon</i> <i>cancila, Notopterus notopterus, Anabas testudineus, Channa striata, Ch. gachua,</i> and <i>Clarias batrachus</i> from the Cái River in Southern Vietnam, as well as their body sizes, have been studied. The trend of the more intensive accumulation of mercury, protein, and lipids in the muscle tissue of females when compared with males was revealed. A significant relationship between the content of mercury and body size, as well as the content of mercury and the proportion of protein in the muscles, has not been established in most of the studied individuals. Trophic patterns of mercury accumulation in fish muscles has been confirmed: its content increases from euryphages to zoophages (facultative predators). An exception is the euryphage <i>Clarias batrachus,</i> which surpasses many facultative predators in mercury content. It is shown that individuals of the same species living in the biotopes of the Cái River with different hydrodynamic and hydrochemical conditions differ in weight, length, content of protein, lipids, and mercury in muscle tissue.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"59 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141153848","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010103
V. I. Lazareva, S. M. Zhdanova, R. Z. Sabitova, E. A. Sokolova
Abstract
The taxonomic structure and spatial distribution of the late-summer zooplankton in the Volga River from the upper Ivankovo Reservoir to the Volga Delta near Astrakhan in 2020–2021 have been studied. Zooplankton biomass in most of the Volga reservoirs is dominated by cladoceran Daphnia galeata and copepod Mesocyclops leuckarti (up to 45–84%). However, different dominant species are observed in the Volgograd Reservoir. Cladocerans Chydorus sphaericus and Bosmina cf. longispina formed there up to 43% of the total zooplankton biomass. Rotifers and Ponto-Caspian copepod Heteroscope caspian are dominant in the Volga River below the dam of the Volzhskaya Hydroelectric Station (56% and 18% of the total zooplankton biomass, respectively). Among invasive species, most abundant are the East Asian copepod Thermocyclops taihokuensis (up to 230 000 ind./m3 and locally >90% of the total biomass) and the North American copepod Acanthocyclops americanus (up to 86 000 ind./m3 and >35% of the total biomass). The maximum abundance of the zooplankton (0.8–1.6 g/m3) is observed in the Upper Volga reservoirs, while the minimum abundance (0.1–0.2 g/m3) is found in the Lower Volga. The maximum abundance of zooplankton (0.8–3.3 g/m3) is recorded in the mouth areas of the reservoir tributaries, while the minimum abundance (0.1–1.4 g/m3) is in the pelagic zone of the reservoirs. A decrease in the zooplankton community biomass from the Upper to Lower Volga is observed in all biotopes. A negative correlation between the community abundance and daily water inflow into the reservoirs and a positive correlation between the community abundance and water temperature are revealed. Long-term variations in zooplankton biomass and their relationship with the trophic state and thermal and oxygen regimes of the water body are discussed.
{"title":"Zooplankton of Volga River Reservoirs: Structure, Abundance and Dynamics","authors":"V. I. Lazareva, S. M. Zhdanova, R. Z. Sabitova, E. A. Sokolova","doi":"10.1134/s1995082924010103","DOIUrl":"https://doi.org/10.1134/s1995082924010103","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The taxonomic structure and spatial distribution of the late-summer zooplankton in the Volga River from the upper Ivankovo Reservoir to the Volga Delta near Astrakhan in 2020–2021 have been studied. Zooplankton biomass in most of the Volga reservoirs is dominated by cladoceran <i>Daphnia galeata</i> and copepod <i>Mesocyclops leuckarti</i> (up to 45–84%). However, different dominant species are observed in the Volgograd Reservoir. Cladocerans <i>Chydorus sphaericus</i> and <i>Bosmina</i> cf. <i>longispina</i> formed there up to 43% of the total zooplankton biomass. Rotifers and Ponto-Caspian copepod <i>Heteroscope caspian</i> are dominant in the Volga River below the dam of the Volzhskaya Hydroelectric Station (56% and 18% of the total zooplankton biomass, respectively). Among invasive species, most abundant are the East Asian copepod <i>Thermocyclops taihokuensis</i> (up to 230 000 ind./m<sup>3</sup> and locally >90% of the total biomass) and the North American copepod <i>Acanthocyclops americanus</i> (up to 86 000 ind./m<sup>3</sup> and >35% of the total biomass). The maximum abundance of the zooplankton (0.8–1.6 g/m<sup>3</sup>) is observed in the Upper Volga reservoirs, while the minimum abundance (0.1–0.2 g/m<sup>3</sup>) is found in the Lower Volga. The maximum abundance of zooplankton (0.8–3.3 g/m<sup>3</sup>) is recorded in the mouth areas of the reservoir tributaries, while the minimum abundance (0.1–1.4 g/m<sup>3</sup>) is in the pelagic zone of the reservoirs. A decrease in the zooplankton community biomass from the Upper to Lower Volga is observed in all biotopes. A negative correlation between the community abundance and daily water inflow into the reservoirs and a positive correlation between the community abundance and water temperature are revealed. Long-term variations in zooplankton biomass and their relationship with the trophic state and thermal and oxygen regimes of the water body are discussed.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"39 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140887626","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010188
V. V. Vezhnavets, A. V. Kouraev, E. Kh. Gukasyan, B. K. Gabrielyan
Abstract
We have studied the state of the zooplankton community of Lake Sevan in present-day climatic conditions at a relatively stable water level. The taxonomic composition is poor but retains features that were characteristic of this lake even before the beginning of the artificial lowering of the water level (1938) for energy and irrigation purposes. The lake is mesotrophic in zooplankton development indicators, but in some years a low transparency and high values of zooplankton biomass are observed, which is characteristic of eutrophic reservoirs. This is a consequence of an increase in water level and aY possible increase in water temperature under climate change.
{"title":"Zooplankton Study of Lake Sevan as an Indicator of Ecosystem Stability in the Context of Global Climate Change","authors":"V. V. Vezhnavets, A. V. Kouraev, E. Kh. Gukasyan, B. K. Gabrielyan","doi":"10.1134/s1995082924010188","DOIUrl":"https://doi.org/10.1134/s1995082924010188","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>We have studied the state of the zooplankton community of Lake Sevan in present-day climatic conditions at a relatively stable water level. The taxonomic composition is poor but retains features that were characteristic of this lake even before the beginning of the artificial lowering of the water level (1938) for energy and irrigation purposes. The lake is mesotrophic in zooplankton development indicators, but in some years a low transparency and high values of zooplankton biomass are observed, which is characteristic of eutrophic reservoirs. This is a consequence of an increase in water level and aY possible increase in water temperature under climate change.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"19 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010127
N. M. Mineeva, V. I. Lazareva, S. A. Poddubnyi, A. V. Zakonnova, A. I. Kopylov, D. B. Kosolapov, L. G. Korneva, E. A. Sokolova, I. L. Pyrina, I. V. Mitropol’skaya
Abstract
Based on the data of complex environmental studies, which have been regularly carried out at six standard stations of the Rybinsk Reservoir since the middle of the 20th century, the orientation of changes in the elements of the reservoir ecosystem associated with global climatic events has been analyzed. During the period of climate warming, which began in 1977 and continues into the 21st century, the air temperature in the warm season has increased by 0.9°C, the water temperature by 1.4°C, the average annual inflow by 7.5%, and the duration of the ice-free period by 2 weeks. An increase in electrical conductivity and color of water and a decrease in transparency are noted. With significant interannual variations in biological characteristics, in the 21st century, the number of bacterioplankton has increased 1.7 times and bacterial production has doubled. Chlorophyll content has increased 1.4 times and mean values >15 μg/L reflecting the eutrophic state of the reservoir are observed more often. In the biomass of phytoplankton, the proportion of small cell forms has increased. The total abundance of phytoplankton has increased due to the development of cyanobacteria, which form a long summer maximum in the seasonal dynamics of the community. The increase in water mineralization promoted the progressive spread of alien brackish-water algae. The biomass of zooplankton has increased 2.5 times. An increase in the abundance of crustaceans (Cladocerans by 1.6 times and Copepods by 1.9 times) has caused a change in the structure of zooplankton and the formation of a strong late summer peak of biomass. The intensification of hydrobiological processes was clearly manifested after the abnormally hot 2010, the conditions of which not only stimulated the development of plankton communities, but also caused the formation of oxygen deficiency in the bottom layers. Warming has significantly transformed the ecosystem of the Rybinsk Reservoir, intensified eutrophication processes, and worsened water quality. Changes in hydrometeorological characteristics have gone beyond the mild scenario of climate warming.
{"title":"Structure and Functioning of Plankton Communities in the Rybinsk Reservoir under the Conditions of Climate Change","authors":"N. M. Mineeva, V. I. Lazareva, S. A. Poddubnyi, A. V. Zakonnova, A. I. Kopylov, D. B. Kosolapov, L. G. Korneva, E. A. Sokolova, I. L. Pyrina, I. V. Mitropol’skaya","doi":"10.1134/s1995082924010127","DOIUrl":"https://doi.org/10.1134/s1995082924010127","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on the data of complex environmental studies, which have been regularly carried out at six standard stations of the Rybinsk Reservoir since the middle of the 20th century, the orientation of changes in the elements of the reservoir ecosystem associated with global climatic events has been analyzed. During the period of climate warming, which began in 1977 and continues into the 21st century, the air temperature in the warm season has increased by 0.9°C, the water temperature by 1.4°C, the average annual inflow by 7.5%, and the duration of the ice-free period by 2 weeks. An increase in electrical conductivity and color of water and a decrease in transparency are noted. With significant interannual variations in biological characteristics, in the 21st century, the number of bacterioplankton has increased 1.7 times and bacterial production has doubled. Chlorophyll content has increased 1.4 times and mean values >15 μg/L reflecting the eutrophic state of the reservoir are observed more often. In the biomass of phytoplankton, the proportion of small cell forms has increased. The total abundance of phytoplankton has increased due to the development of cyanobacteria, which form a long summer maximum in the seasonal dynamics of the community. The increase in water mineralization promoted the progressive spread of alien brackish-water algae. The biomass of zooplankton has increased 2.5 times. An increase in the abundance of crustaceans (Cladocerans by 1.6 times and Copepods by 1.9 times) has caused a change in the structure of zooplankton and the formation of a strong late summer peak of biomass. The intensification of hydrobiological processes was clearly manifested after the abnormally hot 2010, the conditions of which not only stimulated the development of plankton communities, but also caused the formation of oxygen deficiency in the bottom layers. Warming has significantly transformed the ecosystem of the Rybinsk Reservoir, intensified eutrophication processes, and worsened water quality. Changes in hydrometeorological characteristics have gone beyond the mild scenario of climate warming.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"27 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140168112","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010139
T. V. Safronova, E. S. Gusev, L. Nguyen Thi
Abstract
A new species, Mallomonas limbata sp. nov., is described from Vietnam. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. The species belongs to the section Planae and has a similar morphology with species from the Mallomonas matvienkoae complex. The new species has ovoid scales, narrowed distally, and a developed secondary silica layer with internal reticulation with rounded meshes, occupying up to 4/5 of the scale surface, with numerous papillae on the surface. Scales of M. limbata have been found at 26 localities in 9 provinces of Vietnam. The distributions and habitat conditions of the new species are summarized.
{"title":"Description of the New Species Mallomonas limbata sp. nov. (Synurales, Chrysophyceae) from Water Bodies of Vietnam","authors":"T. V. Safronova, E. S. Gusev, L. Nguyen Thi","doi":"10.1134/s1995082924010139","DOIUrl":"https://doi.org/10.1134/s1995082924010139","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A new species, <i>Mallomonas limbata</i> sp. nov., is described from Vietnam. The description is based on silica-scale morphology studied by means of transmission and scanning electron microscopy. The species belongs to the section Planae and has a similar morphology with species from the <i>Mallomonas matvienkoae</i> complex. The new species has ovoid scales, narrowed distally, and a developed secondary silica layer with internal reticulation with rounded meshes, occupying up to 4/5 of the scale surface, with numerous papillae on the surface. Scales of <i>M. limbata</i> have been found at 26 localities in 9 provinces of Vietnam. The distributions and habitat conditions of the new species are summarized.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"23 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167979","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010097
L. S. Krashchuk, E. A. Silow, O. O. Rusanovskaya, S. V. Shimaraeva
Abstract
The results of a study of phytoplankton biomass in different regions of Lake Baikal according to data from 15 expeditions from 1994 to 2013 are presented in this paper. The spatial distribution and interannual dynamics of biomass of phytoplankton in all three basins of the lake are analyzed. The general biomass of phytoplankton during late summer is not high. The multiyear mean phytoplankton biomass equals 169 ± 5 mg/m3 for the open waters of the lake. It is distributed relatively uniformly around southern Baikal. There are higher multiyear mean values along the eastern shore in the Middle and Northern Baikal. The late summer phytoplankton biomass in southern and middle basins does not differ. The mean multiyear biomass of phytoplankton of the northern basin is accurately lower than the one for the two others. No increase in biomass for any region of the lake is demonstrated. The relations of the general biomass of phytoplankton with water temperatures are very slight.
{"title":"Spatiotemporal Changes in the Phytoplankton in Lake Baikal during Late Summer: II. Biomass","authors":"L. S. Krashchuk, E. A. Silow, O. O. Rusanovskaya, S. V. Shimaraeva","doi":"10.1134/s1995082924010097","DOIUrl":"https://doi.org/10.1134/s1995082924010097","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of a study of phytoplankton biomass in different regions of Lake Baikal according to data from 15 expeditions from 1994 to 2013 are presented in this paper. The spatial distribution and interannual dynamics of biomass of phytoplankton in all three basins of the lake are analyzed. The general biomass of phytoplankton during late summer is not high. The multiyear mean phytoplankton biomass equals 169 ± 5 mg/m<sup>3</sup> for the open waters of the lake. It is distributed relatively uniformly around southern Baikal. There are higher multiyear mean values along the eastern shore in the Middle and Northern Baikal. The late summer phytoplankton biomass in southern and middle basins does not differ. The mean multiyear biomass of phytoplankton of the northern basin is accurately lower than the one for the two others. No increase in biomass for any region of the lake is demonstrated. The relations of the general biomass of phytoplankton with water temperatures are very slight.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"1 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140168213","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010048
O. A. Dmitrieva, A. S. Semenova, E. Y. Kazakova
Abstract
The structure and dynamics of plankton communities in the coastal zone of the Curonian Lagoon of the Baltic Sea from January to December 2017–2021 has been studied. It was found that, at the coastal shallow littoral station surrounded by macrophytes, the species diversity was higher and the quantitative characteristics of phytoplankton and zooplankton were lower in all seasons and years of the study than at the deeper coastal station located behind the macrophyte belt. The exception was the period when, as a result of surge events, the phytoplankton biomass in the coastal littoral in October–November 2018 increased to 326–627 g/m3. Every year, Cyanobacteria “blooms” with different intensities and durations were observed at the Lagoon. The abundance of cells of potentially toxic Сyanobacteria exceeded the World Health Organization standard, as a rule, in summer months at a deepwater coastal station, especially in 2017–2018. This had a negative impact on the state of the entire ecosystem, primarily on zooplankton organisms, in which communities the proportion of dead individuals increased. Water during the period of Cyanobacterial blooms in summer and autumn 2017–2018 also had an acute toxic effect on planktonic test organisms.
{"title":"Structure and Dynamics of Plankton Communities in the Coastal Zone of the Curonian Lagoon of the Baltic Sea in 2017–2021 in the Period of Cyanobacterial Blooms","authors":"O. A. Dmitrieva, A. S. Semenova, E. Y. Kazakova","doi":"10.1134/s1995082924010048","DOIUrl":"https://doi.org/10.1134/s1995082924010048","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The structure and dynamics of plankton communities in the coastal zone of the Curonian Lagoon of the Baltic Sea from January to December 2017–2021 has been studied. It was found that, at the coastal shallow littoral station surrounded by macrophytes, the species diversity was higher and the quantitative characteristics of phytoplankton and zooplankton were lower in all seasons and years of the study than at the deeper coastal station located behind the macrophyte belt. The exception was the period when, as a result of surge events, the phytoplankton biomass in the coastal littoral in October–November 2018 increased to 326–627 g/m<sup>3</sup>. Every year, Cyanobacteria “blooms” with different intensities and durations were observed at the Lagoon. The abundance of cells of potentially toxic Сyanobacteria exceeded the World Health Organization standard, as a rule, in summer months at a deepwater coastal station, especially in 2017–2018. This had a negative impact on the state of the entire ecosystem, primarily on zooplankton organisms, in which communities the proportion of dead individuals increased. Water during the period of Cyanobacterial blooms in summer and autumn 2017–2018 also had an acute toxic effect on planktonic test organisms.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"22 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140167978","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-03-19DOI: 10.1134/s1995082924010152
M. M. Smirnova, E. E. Ezhova
Abstract
Using immunochromatographic express analysis, it is shown that hepatotoxic metabolites of cyanobacteria, microcystins, were present in the littoral of the western coast of the Curonian Lagoon in 2011–2018 regularly during the summer and autumn months. More than half of all samples contained microcystins. The proportion of samples containing toxins is higher near large settlements. A high content of microcystins is more often recorded in the southern part of the coastal zone. Water toxicity caused by the presence of microcystins is a characteristic feature of the Curonian Lagoon.
{"title":"Presence of Total Microcystins in the Littoral of the Western Coast of the Curonian Lagoon of the Baltic Sea in 2011–2018 by the Data of Immunochromatographic Analysis","authors":"M. M. Smirnova, E. E. Ezhova","doi":"10.1134/s1995082924010152","DOIUrl":"https://doi.org/10.1134/s1995082924010152","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using immunochromatographic express analysis, it is shown that hepatotoxic metabolites of cyanobacteria, microcystins, were present in the littoral of the western coast of the Curonian Lagoon in 2011–2018 regularly during the summer and autumn months. More than half of all samples contained microcystins. The proportion of samples containing toxins is higher near large settlements. A high content of microcystins is more often recorded in the southern part of the coastal zone. Water toxicity caused by the presence of microcystins is a characteristic feature of the Curonian Lagoon.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"114 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-03-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140168510","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
扫码关注我们
求助内容：
应助结果提醒方式：
京公网安备 11010802042870号