Pub Date : 2024-09-19DOI: 10.1134/s1995082924700342
A. M. Chernova, D. A. Philippov, E. A. Kurashov
Abstract
The low molecular weight metabolome (LMWM) of Lobelia dortmanna L. (Campanulaceae, Magnoliophyta)—a relic aquatic macrophyte listed in the Red Data Books of the Russian Federation and the Republic of Belarus—has been studied for the first time using the GC/MS technique. This macrophyte grows in oligotrophic lakes in the northwest of Vologda oblast, Russia. We have discovered 127 volatile low molecular weight organic compounds (VOCs), and 13 of the main ones accounted for 77.23% of the overall VOC content (198.75 µg/g of dry plant mass). The main components of the LMWM are represented by carboxylic acids and hydrocarbons. The presence of a large number of biologically active metabolites with a high concentration in L. dortmanna LMWM may indicate a significant effect of this plant on the hydrobiocenoses of the littoral zone of oligotrophic lakes. Further research into the LMWM of aquatic macrophytes in oligotrophic lakes, a valuable renewable resource, is needed to assess the background characteristics of the natural environment for the more effective monitoring of the ecological status of water bodies in northwestern Russia and rational use of their biological resources.
{"title":"The First Information on the Low Molecular Metabolome Lobelia dortmanna (Campanulaceae, Magnoliophyta) Growing in Northwestern Russia","authors":"A. M. Chernova, D. A. Philippov, E. A. Kurashov","doi":"10.1134/s1995082924700342","DOIUrl":"https://doi.org/10.1134/s1995082924700342","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The low molecular weight metabolome (LMWM) of <i>Lobelia dortmanna</i> L. (Campanulaceae, Magnoliophyta)—a relic aquatic macrophyte listed in the Red Data Books of the Russian Federation and the Republic of Belarus—has been studied for the first time using the GC/MS technique. This macrophyte grows in oligotrophic lakes in the northwest of Vologda oblast, Russia. We have discovered 127 volatile low molecular weight organic compounds (VOCs), and 13 of the main ones accounted for 77.23% of the overall VOC content (198.75 µg/g of dry plant mass). The main components of the LMWM are represented by carboxylic acids and hydrocarbons. The presence of a large number of biologically active metabolites with a high concentration in <i>L. dortmanna</i> LMWM may indicate a significant effect of this plant on the hydrobiocenoses of the littoral zone of oligotrophic lakes. Further research into the LMWM of aquatic macrophytes in oligotrophic lakes, a valuable renewable resource, is needed to assess the background characteristics of the natural environment for the more effective monitoring of the ecological status of water bodies in northwestern Russia and rational use of their biological resources.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"64 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247796","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 : 2024-09-19DOI: 10.1134/s1995082924700214
L. V. Stelmakh, O. S. Alatartseva
Abstract
In cells of a culture of the large diatom Ditylum brightwellii (T. West) Grunow acclimated to faint light (17 μmol photons/(m2 s)), numerous chloroplasts are evenly distributed throughout the cell cytoplasm. After 10 min of exposure of algae to extremely high illumination (1100 μmol photons/(m2 s)), their aggregates gradually form in the center of the cell, and their formation continues until the end of the 2-h exposure period. At light intensities of 510–935 µmol photons/(m2 s) during short-term photoacclimation, the aggregation of chloroplasts is recorded for 20–60 min, after which their reverse movement and uniform distribution in the cytoplasm are revealed by the end of the second hour. Under conditions of a longer culture stay at a light intensity of 1100 μmol photons/(m2 s), the algae retains viability for only 6 h. Long-term photoacclimation of this species, which stops by the end of the second day, is detected when the light becomes half as weak. This is manifested in an increase in cell volume and in the C/Chl a ratio, in the increased aggregation of chloroplasts in the center of the cell, and in a decrease in a number of fluorescent parameters of the efficiency of photosystem II and of culture viability.
{"title":"Acclimation Strategies for the Black Sea Diatom Algae Ditylum brightwellii to High Intensity of Light","authors":"L. V. Stelmakh, O. S. Alatartseva","doi":"10.1134/s1995082924700214","DOIUrl":"https://doi.org/10.1134/s1995082924700214","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>In cells of a culture of the large diatom <i>Ditylum brightwellii</i> (T. West) Grunow acclimated to faint light (17 μmol photons/(m<sup>2</sup> s)), numerous chloroplasts are evenly distributed throughout the cell cytoplasm. After 10 min of exposure of algae to extremely high illumination (1100 μmol photons/(m<sup>2</sup> s)), their aggregates gradually form in the center of the cell, and their formation continues until the end of the 2-h exposure period. At light intensities of 510–935 µmol photons/(m<sup>2</sup> s) during short-term photoacclimation, the aggregation of chloroplasts is recorded for 20–60 min, after which their reverse movement and uniform distribution in the cytoplasm are revealed by the end of the second hour. Under conditions of a longer culture stay at a light intensity of 1100 μmol photons/(m<sup>2</sup> s), the algae retains viability for only 6 h. Long-term photoacclimation of this species, which stops by the end of the second day, is detected when the light becomes half as weak. This is manifested in an increase in cell volume and in the C/Chl <i>a</i> ratio, in the increased aggregation of chloroplasts in the center of the cell, and in a decrease in a number of fluorescent parameters of the efficiency of photosystem II and of culture viability.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"21 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268286","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 : 2024-09-19DOI: 10.1134/s1995082924700299
E. I. Mikhailova
Abstract
The larval development of a fish parasite, Acanthocephalus tenuirostris, has been studied under experimental conditions. This species is common in the eastern regions of Russia, from Primorye to the upper reaches of the Kolyma River. The material for the experiments has been collected from different areas of Magadan oblast, which is located mainly in the subarctic climate zone. In several series of experiments, intermediate hosts (Asellus hilgendorfii) are infected and maintained at a constant temperature of 15°C. In all cases, no more than 45 days are required for the formation of the final cystacanth stage. Along with cystacanths, a large number of other larvae at earlier developmental stages are simultaneously recorded in the hemocoel of the isopods. An additional experiment, carried out at 15°C for the first 45 days and 4–6°C for the next 207 days, has shown the possibility of the further development of larvae at low temperatures. A comparison with the available literature data on the timing of development of European Acanthocephalus species living in temperate climate has suggested that A. tenuirostris has adapted to cold climate conditions, which provides a twofold acceleration of the rate of its development compared to larval A. lucii in Europe.
{"title":"Temperature Adaptation of Acanthocephalus tenuirostris (Palaeacanthocephala: Echinorhynchidae) in the Postembryonic Development","authors":"E. I. Mikhailova","doi":"10.1134/s1995082924700299","DOIUrl":"https://doi.org/10.1134/s1995082924700299","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The larval development of a fish parasite, <i>Acanthocephalus tenuirostris,</i> has been studied under experimental conditions. This species is common in the eastern regions of Russia, from Primorye to the upper reaches of the Kolyma River. The material for the experiments has been collected from different areas of Magadan oblast, which is located mainly in the subarctic climate zone. In several series of experiments, intermediate hosts (<i>Asellus hilgendorfii</i>) are infected and maintained at a constant temperature of 15°C. In all cases, no more than 45 days are required for the formation of the final cystacanth stage. Along with cystacanths, a large number of other larvae at earlier developmental stages are simultaneously recorded in the hemocoel of the isopods. An additional experiment, carried out at 15°C for the first 45 days and 4–6°C for the next 207 days, has shown the possibility of the further development of larvae at low temperatures. A comparison with the available literature data on the timing of development of European <i>Acanthocephalus</i> species living in temperate climate has suggested that <i>A. tenuirostris</i> has adapted to cold climate conditions, which provides a twofold acceleration of the rate of its development compared to larval <i>A. lucii</i> in Europe.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"6 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247792","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 : 2024-09-19DOI: 10.1134/s1995082924700251
F. S. Lobyrev, A. V. Semenova, M. N. Melnikova, E. A. Pivovarov, S. D. Pavlov, V. R. Khokhryakov, E. E. Kislitsa
Abstract
The genetic variability of microsatellite DNA has been studied for the first time for five loci in the common bream Abramis brama (L.) from lakes Sebezhskoye and Necheritsa of the Sebezhsky National Park lake system (Pskov oblast). The results demonstrate the uniformity of estimates of the genetic variability of the bream in the lake system. Estimates of the allelic diversity of microsatellite loci and the expected heterozygosity of local bream groups do not differ significantly. The total genetic differentiation of bream is θ = 0.004, 95% CI (–0.01; 0.01), and is statistically insignificant. The Bayesian analysis of the studied multilocus genotypes has not revealed any population–genetic structure. The results indicate a high level of gene flow between local bream groupings and make it possible to assume the presence of a genetically unified panmixed population in the Sebezhsky National Park lake system.
摘要首次研究了塞别日斯基国家公园湖泊系统（普斯科夫州）塞别日斯科耶湖和涅切利察湖中普通鳊鱼（Abramis brama (L.)）五个位点的微卫星 DNA 遗传变异性。结果表明，对湖泊系统中鳊鱼遗传变异性的估计是一致的。微卫星位点等位基因多样性的估计值和当地鳊鱼群体的预期杂合度没有显著差异。鳊鱼的总遗传差异为θ = 0.004，95% CI (-0.01; 0.01)，在统计学上不显著。对所研究的多焦点基因型进行贝叶斯分析，未发现任何种群遗传结构。结果表明，当地鳊鱼群体之间的基因流动程度很高，因此可以认为塞别日斯基国家公园湖泊系统中存在一个基因统一的泛混种群。
{"title":"Genetic Features of the Bream Abramis brama Population from the Lake System of Sebezhsky National Park","authors":"F. S. Lobyrev, A. V. Semenova, M. N. Melnikova, E. A. Pivovarov, S. D. Pavlov, V. R. Khokhryakov, E. E. Kislitsa","doi":"10.1134/s1995082924700251","DOIUrl":"https://doi.org/10.1134/s1995082924700251","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The genetic variability of microsatellite DNA has been studied for the first time for five loci in the common bream <i>Abramis brama</i> (L.) from lakes Sebezhskoye and Necheritsa of the Sebezhsky National Park lake system (Pskov oblast). The results demonstrate the uniformity of estimates of the genetic variability of the bream in the lake system. Estimates of the allelic diversity of microsatellite loci and the expected heterozygosity of local bream groups do not differ significantly. The total genetic differentiation of bream is θ = 0.004, 95% CI (–0.01; 0.01), and is statistically insignificant. The Bayesian analysis of the studied multilocus genotypes has not revealed any population–genetic structure. The results indicate a high level of gene flow between local bream groupings and make it possible to assume the presence of a genetically unified panmixed population in the Sebezhsky National Park lake system.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"18 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247754","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 : 2024-09-19DOI: 10.1134/s1995082924700184
T. V. Naumova, V. G. Gagarin
Abstract
Based on our own material and literary data, a generalization of information on the genus Tobrilus Andrássy, 1959 has been carried out. The diagnosis of this genus has been changed, the species diagnostic characteristics have been analyzed, and the species structure of the genus has been examined. The genus includes 29 valid species. The key to the definition of the species of genus and the summary table of morphological characteristics of valid species are given.
{"title":"Review of the Species of the Genus Tobrilus (Nematoda, Triplonchida)","authors":"T. V. Naumova, V. G. Gagarin","doi":"10.1134/s1995082924700184","DOIUrl":"https://doi.org/10.1134/s1995082924700184","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Based on our own material and literary data, a generalization of information on the genus <i>Tobrilus</i> Andrássy, 1959 has been carried out. The diagnosis of this genus has been changed, the species diagnostic characteristics have been analyzed, and the species structure of the genus has been examined. The genus includes 29 valid species. The key to the definition of the species of genus and the summary table of morphological characteristics of valid species are given.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"3 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247751","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 : 2024-09-19DOI: 10.1134/s1995082924700330
N. Y. Stepanova, K. A. Shevchuk, L. S. Kuzmin, A. R. Gaisin
Abstract
A study of the microplastic (MP) content in water, sediments, and gills and gastrointestinal tract (GIT) of bream (Abramis brama L., 1758) at the mouth of the Mesha River (right tributary of the Kama River) has been conducted. The content of MPs in water is found at the level of 20.5 ± 22.3 items/m3, in bottom sediments (BSs) 44.7 ± 41.8 items/kg, in fish gills 12.3 ± 8.4 items/individual, and in the GIT 14.5 ± 11.5 items/individual. Fibers dominate in water samples and in the gills and GIT of fish; fragments dominate in the sediments. Correlation analysis has shown the presence of a negative relationship between the content of MPs in the gills, GIT, and biological parameters of the fish. In terms of the frequency of occurrence and content of MPs in the gills and GIT, the contamination of the studied fish is at a high level when compared to literature data, which is due to the feeding behavior of bream.
{"title":"Microplastics in Abiotic and Biotic Parts of the Mesha Bay of the Kuibyshev Reservoir (Republic of Tatarstan)","authors":"N. Y. Stepanova, K. A. Shevchuk, L. S. Kuzmin, A. R. Gaisin","doi":"10.1134/s1995082924700330","DOIUrl":"https://doi.org/10.1134/s1995082924700330","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A study of the microplastic (MP) content in water, sediments, and gills and gastrointestinal tract (GIT) of bream (<i>Abramis brama</i> L., 1758) at the mouth of the Mesha River (right tributary of the Kama River) has been conducted. The content of MPs in water is found at the level of 20.5 ± 22.3 items/m<sup>3</sup>, in bottom sediments (BSs) 44.7 ± 41.8 items/kg, in fish gills 12.3 ± 8.4 items/individual, and in the GIT 14.5 ± 11.5 items/individual. Fibers dominate in water samples and in the gills and GIT of fish; fragments dominate in the sediments. Correlation analysis has shown the presence of a negative relationship between the content of MPs in the gills, GIT, and biological parameters of the fish. In terms of the frequency of occurrence and content of MPs in the gills and GIT, the contamination of the studied fish is at a high level when compared to literature data, which is due to the feeding behavior of bream.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"11 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247794","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 : 2024-09-19DOI: 10.1134/s1995082924700263
G. I. Volosnikov, O. N. Zhigileva, A. A. Stafeeva
Abstract
This article presents data on the polymorphism of intermicrosatellite sequences in the sterlet Acipenser ruthenus of the lower reaches of the Irtysh River and the middle reaches of the Ob River. We have assessed the intra- and interpopulation variability and genetic differentiation of A. ruthenus and revealed a high ISSR polymorphism in the species from the central part of the Ob-Irtysh basin. The proportion of polymorphic amplicons is 0.966, genetic diversity is 0.355, and the average number of alleles per locus is 1.97. The highest polymorphism is typical for the sterlet from the Tobol River at the confluence with the Irtysh River. The genetic differentiation between the sterlet groups of the Irtysh and Ob rivers is well pronounced, the interpopulation component accounts for 42% of variability (Gst = 0.42), and the gene flow is limited (Nm = 0.67). The sterlet groups inhabiting the Lower Irtysh from the mouth of the Tobol River to the mouth of the Konda River do not differ genetically and form one population (Gst = 0.08–0.12, Nm = 3.76–5.55). The sterlet from the Irtysh River within the Vagay region is genetically different from the other Irtysh samples (Gst = 0.22, Nm = 1.68) and belongs to a different population group. The differentiation between samples of sterlet from the Ob basin is higher than between samples from the Irtysh basin. Groups of sterlet from the Ob River and the Yuganskaya Ob canal are genetically different (Gst = 0.30, Nm = 1.19) and form various subpopulations. Spawning migrations, as well as confinement to wintering pits, play a decisive role in the formation of the sterlet population structure in the studied part of the distribution area. The sterlet population groups that are identified should be considered separate units of environmental and economic management.
{"title":"Genetic Polymorphism and Differentiation of Populations of Sterlet Acipenser ruthenus (Acipenseridae) in the Lower Irtysh and Middle Ob Basins","authors":"G. I. Volosnikov, O. N. Zhigileva, A. A. Stafeeva","doi":"10.1134/s1995082924700263","DOIUrl":"https://doi.org/10.1134/s1995082924700263","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This article presents data on the polymorphism of intermicrosatellite sequences in the sterlet <i>Acipenser ruthenus</i> of the lower reaches of the Irtysh River and the middle reaches of the Ob River. We have assessed the intra- and interpopulation variability and genetic differentiation of <i>A</i>. <i>ruthenus</i> and revealed a high ISSR polymorphism in the species from the central part of the Ob-Irtysh basin. The proportion of polymorphic amplicons is 0.966, genetic diversity is 0.355, and the average number of alleles per locus is 1.97. The highest polymorphism is typical for the sterlet from the Tobol River at the confluence with the Irtysh River. The genetic differentiation between the sterlet groups of the Irtysh and Ob rivers is well pronounced, the interpopulation component accounts for 42% of variability (<i>G</i>st = 0.42), and the gene flow is limited (<i>N</i>m = 0.67). The sterlet groups inhabiting the Lower Irtysh from the mouth of the Tobol River to the mouth of the Konda River do not differ genetically and form one population (<i>G</i>st = 0.08–0.12, <i>N</i>m = 3.76–5.55). The sterlet from the Irtysh River within the Vagay region is genetically different from the other Irtysh samples (<i>G</i>st = 0.22, <i>N</i>m = 1.68) and belongs to a different population group. The differentiation between samples of sterlet from the Ob basin is higher than between samples from the Irtysh basin. Groups of sterlet from the Ob River and the Yuganskaya Ob canal are genetically different (<i>G</i>st = 0.30, <i>N</i>m = 1.19) and form various subpopulations. Spawning migrations, as well as confinement to wintering pits, play a decisive role in the formation of the sterlet population structure in the studied part of the distribution area. The sterlet population groups that are identified should be considered separate units of environmental and economic management.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"7 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268287","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 : 2024-09-19DOI: 10.1134/s1995082924700226
E. G. Pryanichnikova, A. V. Tikhonov, E. A. Flerova, M. I. Andreeva, A. S. Klyuchnikov
Abstract
This article presents the results of a comprehensive study of two components of the aquatic biocenosis: its floristic component and benthos in the shallow waters of the Gorky Reservoir within the water area of the Yaroslavl State Nature Reserve. The composition and structure of plant communities at the boundary of the macrophyte belt is assessed, followed by the identification of dominant associations. At the same time, the taxonomic composition and quantitative characteristics of macrozoobenthos are assessed in the main plant biotopes. Plant communities in the water area are represented by two ecological groups: helophytes and hydrophytes. Macrophytes occupy up to 25% of the water area of the shallow area of the studied water body. Most of the plant communities are concentrated in the northern and northeastern parts of the reserve. Eleven species of macrophytes belonging to 10 genera and 9 families are noted. In macrophyte communities, eight typical associations were identified where benthos sampling are carried out. In the benthos of typical macrophyte associations, 35 lower definable taxa (LDT) are identified, of which 17 LDT are chironomid larvae. In the biotope, 11 LDT are found out of vegetation. The highest species richness of benthic invertebrates is noted in the communities of Butomus umbellatus L. (1753) and Sparganium erectum L. The benthos of plant communities in August 2021 can be characterized as chironomid–oligochaete, while chironomids dominate in the open littoral. Mollusks play a significant role in the formation of benthos in plant communities. The maximum quantitative indicators of benthic invertebrates in general—and the abundance of chironomids of the genus Glyptotendipes, in particular—have been noted in the community of the burr Sparganium erectum. This is probably due to the morphological structure of this plant and the specifics of the formation of the community by this species. The benthos of plant communities is dominated by phytodetritophages–filterers and phytodetritophages–filterers + gatherers, while phytodetritophages–filterers prevail in the open littoral. There are no detritophages–gatherers in any of the studied biotopes. In general, according to the abundance of macrozoobenthos, the areas of plant communities can be classified as high-nutrient and very high-nutrient.
{"title":"Macrozoobenthos of Communities of Higher Aquatic Vegetation","authors":"E. G. Pryanichnikova, A. V. Tikhonov, E. A. Flerova, M. I. Andreeva, A. S. Klyuchnikov","doi":"10.1134/s1995082924700226","DOIUrl":"https://doi.org/10.1134/s1995082924700226","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This article presents the results of a comprehensive study of two components of the aquatic biocenosis: its floristic component and benthos in the shallow waters of the Gorky Reservoir within the water area of the Yaroslavl State Nature Reserve. The composition and structure of plant communities at the boundary of the macrophyte belt is assessed, followed by the identification of dominant associations. At the same time, the taxonomic composition and quantitative characteristics of macrozoobenthos are assessed in the main plant biotopes. Plant communities in the water area are represented by two ecological groups: helophytes and hydrophytes. Macrophytes occupy up to 25% of the water area of the shallow area of the studied water body. Most of the plant communities are concentrated in the northern and northeastern parts of the reserve. Eleven species of macrophytes belonging to 10 genera and 9 families are noted. In macrophyte communities, eight typical associations were identified where benthos sampling are carried out. In the benthos of typical macrophyte associations, 35 lower definable taxa (LDT) are identified, of which 17 LDT are chironomid larvae. In the biotope, 11 LDT are found out of vegetation. The highest species richness of benthic invertebrates is noted in the communities of <i>Butomus umbellatus</i> L. (1753) and <i>Sparganium erectum</i> L. The benthos of plant communities in August 2021 can be characterized as chironomid–oligochaete, while chironomids dominate in the open littoral. Mollusks play a significant role in the formation of benthos in plant communities. The maximum quantitative indicators of benthic invertebrates in general—and the abundance of chironomids of the genus Glyptotendipes, in particular—have been noted in the community of the burr <i>Sparganium erectum</i>. This is probably due to the morphological structure of this plant and the specifics of the formation of the community by this species. The benthos of plant communities is dominated by phytodetritophages–filterers and phytodetritophages–filterers + gatherers, while phytodetritophages–filterers prevail in the open littoral. There are no detritophages–gatherers in any of the studied biotopes. In general, according to the abundance of macrozoobenthos, the areas of plant communities can be classified as high-nutrient and very high-nutrient.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"34 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268288","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 : 2024-09-19DOI: 10.1134/s1995082924550017
Salim Serkan Güçlü, Saud M. Al Jufaili, Laith A. Jawad
Abstract
The population structure of endemic species arabian goby Сryptocentroides arabicus in Wadi Al‑Bahayes (Oman) (23°40′47″ N; 58°11′36″ E) was investigated using 259 fish sampled in August 2020 and August 2021. In this study, the growth and reproductive traits of C. arabicus were investigated. The length-weight relationship and Von Bertalanffy growth equation were as follows: W = 0.0271L2.3342, R = 0.8731, Lt = 20.14 (1 – e–0.1984(t – 0.053)). Spawning occurred between March and June. The average fecundity per individual was determined to be 1760 ± 186.5 number/(ind./year). According to the results, the species lives in a wide area in its habitat, although it shows negative allometric growth. Since the other species in the environment, introduce Poecilia latipinna and endemic-predator Aphaniops stoliczkanus, may face the negative effects, the habitat and itself must be protected.
{"title":"Aspects of the Biology of Cryptocentroides arabicus (Actinopterygii, Gobiidae) in Wadi Al-Bahayes, Oman: Population Structure of the Arabian Goby","authors":"Salim Serkan Güçlü, Saud M. Al Jufaili, Laith A. Jawad","doi":"10.1134/s1995082924550017","DOIUrl":"https://doi.org/10.1134/s1995082924550017","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The population structure of endemic species arabian goby <i>Сryptocentroides arabicus</i> in Wadi Al‑Bahayes (Oman) (23°40′47″ N; 58°11′36″ E) was investigated using 259 fish sampled in August 2020 and August 2021. In this study, the growth and reproductive traits of <i>C. arabicus</i> were investigated. The length-weight relationship and Von Bertalanffy growth equation were as follows: <i>W</i> = 0.0271<i>L</i><sup>2.3342</sup>, <i>R</i> = 0.8731, <i>Lt</i> = 20.14 (1 <i>– e</i><sup>–0.1984(<i>t –</i> 0.053)</sup>). Spawning occurred between March and June. The average fecundity per individual was determined to be 1760 ± 186.5 number/(ind./year). According to the results, the species lives in a wide area in its habitat, although it shows negative allometric growth. Since the other species in the environment, introduce <i>Poecilia latipinna</i> and endemic-predator <i>Aphaniops stoliczkanus</i>, may face the negative effects, the habitat and itself must be protected.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"51 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142247790","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 : 2024-09-19DOI: 10.1134/s1995082924700202
J. V. Krylova, E. A. Kurashov, E. V. Protopopova, V. V. Khodonovich, E. Ya. Yavid, G. I. Kuchareva
Abstract
The composition and nature of changes in the low-molecular-weight metabolome (LMWM) of Potamogeton perfoliatus L. growing in six biotopes of Lake Ladoga with different types of anthropogenic load have been analyzed. According to the results, it is found that the total number of low-molecular-weight organic compounds (LMWOCs) in the P. perfoliatus LMWM composition is directly dependent on anthropogenic load, which is well marked by the development of cyanobacteria. The greater the intensity of pollution or eutrophication of waters, or the higher the number of cyanobacteria, the lower the total number of LMWOCs and their concentration. A strongly pronounced dependence of the total concentrations of groups of LMWM compounds on the anthropogenic disturbance of the biotope and the concentration of cyanobacteria is revealed. A decrease in the number, relative amount, total concentration of carboxylic acids, and number and content of unsaturated fatty acids and an increase in the composition and content of phenols and the total content of aldehydes and ketones depends on an increase in anthropogenic pressure. The specific composition of the LMWM of claspingleaf pondweed depends on its response to biotic and abiotic factors of the aquatic (including anthropogenic) environment. The features of the change in the composition of the P. perfoliatus LMWM make it possible to use it as an integral indicator of the anthropogenic impact on the littoral biotopes of water bodies and the deterioration of their ecological state.
{"title":"Composition of the Low Molecular Weight Metabolome of Potamogeton perfoliatus (Potamogetonaceae) as an Indicator of the Transformation of the Ecological State of the Littoral Zone","authors":"J. V. Krylova, E. A. Kurashov, E. V. Protopopova, V. V. Khodonovich, E. Ya. Yavid, G. I. Kuchareva","doi":"10.1134/s1995082924700202","DOIUrl":"https://doi.org/10.1134/s1995082924700202","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The composition and nature of changes in the low-molecular-weight metabolome (LMWM) of <i>Potamogeton perfoliatus</i> L. growing in six biotopes of Lake Ladoga with different types of anthropogenic load have been analyzed. According to the results, it is found that the total number of low-molecular-weight organic compounds (LMWOCs) in the <i>P. perfoliatus</i> LMWM composition is directly dependent on anthropogenic load, which is well marked by the development of cyanobacteria. The greater the intensity of pollution or eutrophication of waters, or the higher the number of cyanobacteria, the lower the total number of LMWOCs and their concentration. A strongly pronounced dependence of the total concentrations of groups of LMWM compounds on the anthropogenic disturbance of the biotope and the concentration of cyanobacteria is revealed. A decrease in the number, relative amount, total concentration of carboxylic acids, and number and content of unsaturated fatty acids and an increase in the composition and content of phenols and the total content of aldehydes and ketones depends on an increase in anthropogenic pressure. The specific composition of the LMWM of claspingleaf pondweed depends on its response to biotic and abiotic factors of the aquatic (including anthropogenic) environment. The features of the change in the composition of the <i>P. perfoliatus</i> LMWM make it possible to use it as an integral indicator of the anthropogenic impact on the littoral biotopes of water bodies and the deterioration of their ecological state.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"36 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142268285","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}
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