Pub Date : 2024-08-30DOI: 10.1134/s1995082924700408
K. S. Vainutis, A. N. Voronova, M. E. Andreev, N. E. Zyumchenko
Abstract
The paper presents a redescription of the parasitic nematode Philometroides strelkovi (Chromadorea: Dracunculoidea) based on the new morphometric data. New hosts from the Cyprinidae family (Rhodeus sericeus, Hemiculter leucisculus, Hemibarbus labeo) and locality—the Luchegorsk reservoir belonging to the Amur River basin (Pozharsky district of Primorsky Krai in the south of the Russian Far East) have been described. For the first time, sequences of the 18S rRNA marker gene have been obtained for P. strelkovi. On the basis of genetic data, we performed phylogenetic reconstruction and showed the clustering of P. strelkovi, separate from the sister species P. moraveci, confirmed by high statistical support at branching nodes and the size of genetic distances—0.11–0.56% between P. strelkovi and other representatives of the genus, along with intergeneric divergence of >4%. In the light of new molecular data, the question of the artificiality of the genera Philometroides and Philometra is raised.
摘要 本文根据新的形态计量数据重新描述了寄生线虫Philometroides strelkovi（Chromadorea: Dracunculoidea）。描述了鲤科的新宿主（Rhodeus sericeus、Hemiculter leucisculus、Hemibarbus labeo）和地点--属于阿穆尔河流域的卢切戈尔斯克水库（俄罗斯远东地区南部滨海边疆区的波扎尔斯基区）。我们首次获得了 P. strelkovi 的 18S rRNA 标记基因序列。在遗传数据的基础上，我们进行了系统发育重建，结果表明，P. strelkovi 与姊妹种 P. moraveci 分开聚类，分支节点的高统计支持率和 P. strelkovi 与该属其他代表种之间的遗传距离大小-0.11-0.56%，以及 4%的属间差异证实了这一点。根据新的分子数据，提出了 Philometroides 属和 Philometra 属的人为性问题。
{"title":"Morphological and Molecular Identification of Tissue Nematode Philometroides strelkovi (Chromadorea: Dracunculoidea) from Three Cyprinid Species in the North of Primorsky Region","authors":"K. S. Vainutis, A. N. Voronova, M. E. Andreev, N. E. Zyumchenko","doi":"10.1134/s1995082924700408","DOIUrl":"https://doi.org/10.1134/s1995082924700408","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The paper presents a redescription of the parasitic nematode <i>Philometroides strelkovi</i> (Chromadorea: Dracunculoidea) based on the new morphometric data. New hosts from the Cyprinidae family (<i>Rhodeus sericeus</i>, <i>Hemiculter leucisculus</i>, <i>Hemibarbus labeo</i>) and locality—the Luchegorsk reservoir belonging to the Amur River basin (Pozharsky district of Primorsky Krai in the south of the Russian Far East) have been described. For the first time, sequences of the 18S rRNA marker gene have been obtained for <i>P. strelkovi</i>. On the basis of genetic data, we performed phylogenetic reconstruction and showed the clustering of <i>P. strelkovi</i>, separate from the sister species <i>P. moraveci</i>, confirmed by high statistical support at branching nodes and the size of genetic distances—0.11–0.56% between <i>P. strelkovi</i> and other representatives of the genus, along with intergeneric divergence of >4%. In the light of new molecular data, the question of the artificiality of the genera <i>Philometroides</i> and <i>Philometra</i> is raised.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"242 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142207721","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 : 2024-07-13DOI: 10.1134/s1995082924700111
N. G. Medvedeva, T. B. Zaytseva, I. L. Kuzikova, O. G. Timofeeva, I. S. Chernov
Abstract
The novel strain SR-1.3 with algicidal properties and the ability to remove microcystin-LR (MC-LR) has been isolated from the water of Lake Sestroretsk Razliv during active cyanobacteria vegetation. Based on the morphological and cultural characteristics and the results of sequencing the ITS region of DNA, strain SR-1.3 was identified as Penicillium chrysogenum. The SR-1.3 strain exhibits algicidal activity against cyanobacteria and green algae. A dose-dependent and species-specific nature of the algicidal action of the P. chrysogenum SR-1.3 strain has been established. Cyanobacteria show the highest sensitivity to strain SR-1.3. The complete lysis (100%) of cyanobacteria cells is observed when 10% (vol) of the culture liquid or the micromycete filtrate are added to the medium. The algicidal effect of strain SR-1.3 on green algae is 30–70%, depending on the culture. According to the level of sensitivity to the algicidal effect of SR-1.3, the test cultures can be arranged in the series Planktothrix agardhii > Microcystis aeruginosa > Aphanizomenon flos-aquae = Anabaena cylindrica > Scenedesmus quadricauda > Oocystis parva. The inhibitory effect of the strain SR-1.3 mycelium on cyanobacteria and green algae growth does not exceed 3–6%. Based on the results, a conclusion was made about the indirect mechanism of the algicidal action of P. chrysogenum SR-1.3 by excretion into the medium of metabolites that inhibit and/or lyse cells of cyanobacteria and green algae. When toxigenic strains M. aeruginosa and P. agardhii are cultivated on a medium containing exometabolites of strain SR-1.3, the concentrations of microcystins in the medium decreases 3.3 and 1.8 times, respectively, compared with control variants. The ability of P. chrysogenum SR-1.3 to remove the highly toxic MC-LR from the cultivation medium is revealed. The MC-LR content is found to decrease from 1.2 to 0.79 μg/mL over 48 h during the cultivation of strain SR-1.3 on a medium with microcystin.
{"title":"Isolation, Identification, and Characterization of the Algicidal Micromycete Penicillium chrysogenum SR-1.3","authors":"N. G. Medvedeva, T. B. Zaytseva, I. L. Kuzikova, O. G. Timofeeva, I. S. Chernov","doi":"10.1134/s1995082924700111","DOIUrl":"https://doi.org/10.1134/s1995082924700111","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The novel strain SR-1.3 with algicidal properties and the ability to remove microcystin-LR (MC-LR) has been isolated from the water of Lake Sestroretsk Razliv during active cyanobacteria vegetation. Based on the morphological and cultural characteristics and the results of sequencing the ITS region of DNA, strain SR-1.3 was identified as <i>Penicillium chrysogenum</i>. The SR-1.3 strain exhibits algicidal activity against cyanobacteria and green algae. A dose-dependent and species-specific nature of the algicidal action of the <i>P. chrysogenum</i> SR-1.3 strain has been established. Cyanobacteria show the highest sensitivity to strain SR-1.3. The complete lysis (100%) of cyanobacteria cells is observed when 10% (vol) of the culture liquid or the micromycete filtrate are added to the medium. The algicidal effect of strain SR-1.3 on green algae is 30–70%, depending on the culture. According to the level of sensitivity to the algicidal effect of SR-1.3, the test cultures can be arranged in the series <i>Planktothrix agardhii</i> > <i>Microcystis aeruginosa</i> > <i>Aphanizomenon flos-aquae</i> = <i>Anabaena cylindrica</i> > <i>Scenedesmus quadricauda</i> > <i>Oocystis parva</i>. The inhibitory effect of the strain SR-1.3 mycelium on cyanobacteria and green algae growth does not exceed 3–6%. Based on the results, a conclusion was made about the indirect mechanism of the algicidal action of <i>P. chrysogenum</i> SR-1.3 by excretion into the medium of metabolites that inhibit and/or lyse cells of cyanobacteria and green algae. When toxigenic strains <i>M. aeruginosa</i> and <i>P. agardhii</i> are cultivated on a medium containing exometabolites of strain SR-1.3, the concentrations of microcystins in the medium decreases 3.3 and 1.8 times, respectively, compared with control variants. The ability of <i>P. chrysogenum</i> SR-1.3 to remove the highly toxic MC-LR from the cultivation medium is revealed. The MC-LR content is found to decrease from 1.2 to 0.79 μg/mL over 48 h during the cultivation of strain SR-1.3 on a medium with microcystin.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"36 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610116","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 : 2024-07-13DOI: 10.1134/s1995082924700032
R. E. Belogurova, E. P. Karpova
Abstract
The variability of the morphological characters of the genus Alburnoides Jeitteles, 1861 from watercourses in the south of Russia (five rivers of the Crimean Peninsula and two rivers of Krasnodar krai) is considered. It has been established that, in spirlins within the study areas, body sizes average from 60.1 ± 1.45 mm in individuals from the Gostagaika River (Krasnodar krai) up to 88.2 ± 1.87 mm in fish from the Angara River (Crimean Peninsula). Using the Mann–Whitney test, statistically significant differences were registered between the samples in most plastic characters; they were absent in meristic characters. In the studied regions, heterogeneity in the structure of the genus Alburnoides was noted: according to the results of cluster analysis for the totality of all studied characters, the greatest similarity was found in samples from Crimean rivers that are geographically close to each other (the Chernaya, Belbek, Kacha, and Alma), but the group from the Angara River adjoins them at a higher level of divergence. A separate group is formed by samples from the rivers of Krasnodar krai. The data are consistent with the literary information on the formation of the ichthyofauna in the rivers of Crimea; the clear differences between the spirlins from the rivers of southern Russia require a more detailed study.
{"title":"Variability of Morphological Characters of the Genus Alburnoides (Pisces, Leuciscidae) from Watercourses in Southern Russia","authors":"R. E. Belogurova, E. P. Karpova","doi":"10.1134/s1995082924700032","DOIUrl":"https://doi.org/10.1134/s1995082924700032","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The variability of the morphological characters of the genus <i>Alburnoides</i> Jeitteles, 1861 from watercourses in the south of Russia (five rivers of the Crimean Peninsula and two rivers of Krasnodar krai) is considered. It has been established that, in spirlins within the study areas, body sizes average from 60.1 ± 1.45 mm in individuals from the Gostagaika River (Krasnodar krai) up to 88.2 ± 1.87 mm in fish from the Angara River (Crimean Peninsula). Using the Mann–Whitney test, statistically significant differences were registered between the samples in most plastic characters; they were absent in meristic characters. In the studied regions, heterogeneity in the structure of the genus <i>Alburnoides</i> was noted: according to the results of cluster analysis for the totality of all studied characters, the greatest similarity was found in samples from Crimean rivers that are geographically close to each other (the Chernaya, Belbek, Kacha, and Alma), but the group from the Angara River adjoins them at a higher level of divergence. A separate group is formed by samples from the rivers of Krasnodar krai. The data are consistent with the literary information on the formation of the ichthyofauna in the rivers of Crimea; the clear differences between the spirlins from the rivers of southern Russia require a more detailed study.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"244 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610110","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 : 2024-07-13DOI: 10.1134/s199508292470007x
I. A. Baryshev, A. A. Frolov
Abstract
Using the example of rivers in the Onega Lake basin, the species composition of mollusks of the Sphaeriidae family and their abundance, biomass, and contribution to benthic communities in rivers with many lakes in the catchment areas have been analyzed. Patterns of the spatial distribution of species across biotopes and gradients of environmental variables are traced. Twenty-six species of mollusks of this family are identified, with European–Siberian species predominating. Most species of mollusks of the family Sphaeriidae found by us have wide ecological ranges and are found in water bodies of various types. It is found that the contribution of Sphaeriidae to the species richness and functioning of aquatic communities in rivers in the conditions of branched lake–river systems (Lake Onega basin) exceeds the values usual for rivers with a small number of lakes in the catchment area. Using the ANOSIM and PERMANOVA methods, it is proven that the species composition of rocky rapids and riffles, sandy rifts, and soft bottom soils is different. Using the IndVal test, seven species are shown to have a statistically significant association with one of these biotopes, and four of them have a statistically significant association with the rocky bottoms of river rapids and riffles. Using the NMDS method, it is shown that the greatest changes in the species composition of representatives of Sphaeriidae are observed when environmental conditions change from small streams with a slow current and brown water to large rivers with a fast current and clear water.
{"title":"Peculiarities of the Species Composition, Abundance, and Biotope Distribution of Mollusks of the Family Sphaeriidae in Rivers with Many Lakes in the Catchment Area (Using the Example of Water Courses of the Onega Lake Basin)","authors":"I. A. Baryshev, A. A. Frolov","doi":"10.1134/s199508292470007x","DOIUrl":"https://doi.org/10.1134/s199508292470007x","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>Using the example of rivers in the Onega Lake basin, the species composition of mollusks of the Sphaeriidae family and their abundance, biomass, and contribution to benthic communities in rivers with many lakes in the catchment areas have been analyzed. Patterns of the spatial distribution of species across biotopes and gradients of environmental variables are traced. Twenty-six species of mollusks of this family are identified, with European–Siberian species predominating. Most species of mollusks of the family Sphaeriidae found by us have wide ecological ranges and are found in water bodies of various types. It is found that the contribution of Sphaeriidae to the species richness and functioning of aquatic communities in rivers in the conditions of branched lake–river systems (Lake Onega basin) exceeds the values usual for rivers with a small number of lakes in the catchment area. Using the ANOSIM and PERMANOVA methods, it is proven that the species composition of rocky rapids and riffles, sandy rifts, and soft bottom soils is different. Using the IndVal test, seven species are shown to have a statistically significant association with one of these biotopes, and four of them have a statistically significant association with the rocky bottoms of river rapids and riffles. Using the NMDS method, it is shown that the greatest changes in the species composition of representatives of Sphaeriidae are observed when environmental conditions change from small streams with a slow current and brown water to large rivers with a fast current and clear water.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"46 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610114","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 : 2024-07-13DOI: 10.1134/s1995082924700160
A. N. Krasnova, T. N. Polshina
Abstract
This article provides information on the finding of the narrowleaf cattail Typha angustata in the delta of the Don River. In the monography “Flora of the Soviet Union,” this species was understood quite broadly; its range stretched from the Danube River to the Pacific Ocean. It had not been found for a long time, so the species was referred to as synonymous to T. australis,T. domingensis, and T. angustifolia. Modern studies have revealed the presence of the species in the distributaries of the Don River. Due to isolations in the Cenozoic, resulting in the severance of the connections with the eastern and western water basins, the range was significantly reduced and the rate of evolution decreased. In the modern geological period, T. angustata is undergoing natural and technogenic elimination.
摘要 本文介绍了在顿河三角洲发现狭叶香蒲 Typha angustata 的情况。在专著《苏联植物志》中，人们对该物种的理解相当宽泛；其分布范围从多瑙河一直延伸到太平洋。该物种已经很久没有被发现了，因此被称为 T. australis、T. domingensis 和 T. angustifolia 的同义词。现代研究发现，该物种存在于顿河的支流中。由于新生代的隔离，导致与东部和西部流域的联系被切断，该物种的分布范围大大缩小，进化速度也有所下降。在现代地质时期，T. angustata 正在经历自然和技术的淘汰。
{"title":"Typha angustata Bory & Chaub. (Typha L., Typhaceae) in the Delta of the Don River (Rostov Oblast)","authors":"A. N. Krasnova, T. N. Polshina","doi":"10.1134/s1995082924700160","DOIUrl":"https://doi.org/10.1134/s1995082924700160","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>This article provides information on the finding of the narrowleaf cattail <i>Typha angustata</i> in the delta of the Don River. In the monography “Flora of the Soviet Union,” this species was understood quite broadly; its range stretched from the Danube River to the Pacific Ocean. It had not been found for a long time, so the species was referred to as synonymous to <i>T. australis,</i> <i>T. domingensis,</i> and <i>T. angustifolia</i>. Modern studies have revealed the presence of the species in the distributaries of the Don River. Due to isolations in the Cenozoic, resulting in the severance of the connections with the eastern and western water basins, the range was significantly reduced and the rate of evolution decreased. In the modern geological period, <i>T. angustata</i> is undergoing natural and technogenic elimination.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"51 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610122","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 : 2024-07-13DOI: 10.1134/s1995082924700019
E. Yu. Afonina, N. A. Tashlykova
Abstract
The results of long-term studies in the cooling reservoir of the Kharanorskaya State District Power Plant (SDPP) (Trans-Baikal Area) are presented, conventionally divided into four periods depending on the increase in its capacity. The stages of phyto- and zooplankton development determined by the influence of technogenic and biotic factors are determined. The response of plankton communities to changes in heat load is shown. Periods of intensive vegetation of algae and mass development of invertebrates alternate with a significant decline in the abundance and biomass of hydrobionts, which indicates an unstable state of the forming cooling pond technoecosystem.
{"title":"Transformation of Planktonic Assemblages in a Severely Stressed Cooling Reservoir","authors":"E. Yu. Afonina, N. A. Tashlykova","doi":"10.1134/s1995082924700019","DOIUrl":"https://doi.org/10.1134/s1995082924700019","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The results of long-term studies in the cooling reservoir of the Kharanorskaya State District Power Plant (SDPP) (Trans-Baikal Area) are presented, conventionally divided into four periods depending on the increase in its capacity. The stages of phyto- and zooplankton development determined by the influence of technogenic and biotic factors are determined. The response of plankton communities to changes in heat load is shown. Periods of intensive vegetation of algae and mass development of invertebrates alternate with a significant decline in the abundance and biomass of hydrobionts, which indicates an unstable state of the forming cooling pond technoecosystem.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"55 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610111","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 : 2024-07-13DOI: 10.1134/s1995082924700147
S. I. Genkal, V. A. Gabyshev
Abstract
The study of algological material from tundra lakes of the adjacent territories of the Ust-Lena Reserve (Yakutia) using scanning electron microscopy revealed a new species of diatoms for science—Buryatia strelnikovae sp. nov. The new species has morphological similarities with other species of the genus B. oviformis and B. crassa. It differs from the former in the larger number of striae and areoles per 10 µm and from the latter in the smaller length and width of the valve and a larger number of striae and areoles per 10 µm.
{"title":"Buryatia strelnikovae (Bacillariophyta), a New Species of Diatoms for Science","authors":"S. I. Genkal, V. A. Gabyshev","doi":"10.1134/s1995082924700147","DOIUrl":"https://doi.org/10.1134/s1995082924700147","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>The study of algological material from tundra lakes of the adjacent territories of the Ust-Lena Reserve (Yakutia) using scanning electron microscopy revealed a new species of diatoms for science—<i>Buryatia strelnikovae</i> sp. nov. The new species has morphological similarities with other species of the genus <i>B. oviformis</i> and <i>B. crassa.</i> It differs from the former in the larger number of striae and areoles per 10 µm and from the latter in the smaller length and width of the valve and a larger number of striae and areoles per 10 µm.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"23 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610119","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 : 2024-07-13DOI: 10.1134/s1995082924700123
M. Ya. Chebotina, V. P. Guseva, D. L. Berzin
Abstract
A study of the accumulation of radionuclides 90Sr, 134Cs, and 137Cs by the marsh frog Pelophylax ridibundus Pall., 1771 living in the areas of the reservoirs of the Middle Urals has been carried out. The variability of size and mass indicators and concentrations of radionuclides in animals in the surveyed area is noted. Increased concentrations of 137Cs and 134Cs are detected in some amphibian representatives when compared with average values. A significant decrease in the concentration of 90Sr in frogs with an increase in raw body weight is found in much statistical material. An analysis of the data obtained on the concentrations of 90Sr and 137Cs in frogs of different sexes did not reveal a significant difference in the accumulation of either radionuclides between male and female animals or 90Sr by striata and strieless amphibians. It is shown that radionuclides 90Sr and 137Cs enter the body of an animal from water much more than from the ground, while, with an increase in the concentration of radionuclide in the habitat, the coefficients of their transition into the animal body decrease.
{"title":"Radioecological Studies of the Marsh Frog in Reservoirs of the Middle Urals","authors":"M. Ya. Chebotina, V. P. Guseva, D. L. Berzin","doi":"10.1134/s1995082924700123","DOIUrl":"https://doi.org/10.1134/s1995082924700123","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A study of the accumulation of radionuclides <sup>90</sup>Sr, <sup>134</sup>Cs, and <sup>137</sup>Cs by the marsh frog <i>Pelophylax ridibundus</i> Pall., 1771 living in the areas of the reservoirs of the Middle Urals has been carried out. The variability of size and mass indicators and concentrations of radionuclides in animals in the surveyed area is noted. Increased concentrations of <sup>137</sup>Cs and <sup>134</sup>Cs are detected in some amphibian representatives when compared with average values. A significant decrease in the concentration of <sup>90</sup>Sr in frogs with an increase in raw body weight is found in much statistical material. An analysis of the data obtained on the concentrations of <sup>90</sup>Sr and <sup>137</sup>Cs in frogs of different sexes did not reveal a significant difference in the accumulation of either radionuclides between male and female animals or <sup>90</sup>Sr by striata and strieless amphibians. It is shown that radionuclides <sup>90</sup>Sr and <sup>137</sup>Cs enter the body of an animal from water much more than from the ground, while, with an increase in the concentration of radionuclide in the habitat, the coefficients of their transition into the animal body decrease.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"2010 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610120","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 : 2024-07-13DOI: 10.1134/s1995082924700159
M. O. Ivanova, P. A. Volkova, A. A. Bobrov
Abstract
For the first time for the Southwestern geobotanical district of Sakhalin (a separate subzone of dark coniferous forests with an admixture of broad-leaved species; it corresponds to Krillon floristic district), a number of new aquatic vascular plant species (Lemna turionifera, Myriophyllum verticillatum, Potamogeton gramineus, P. manchuriensis, Stuckenia pectinata, Utricularia minor, and U. × ochroleuca) has been listed. There is also a novelty for the South Sakhalin lowland geobotanical district (Myriophyllum spicatum). All these taxa are known from other geobotanical districts of Sakhalin. The additions to the list of flora of the southwestern district, which is well surveyed by botanists, indicate not floristic uniqueness of the subzone of dark coniferous forests with an admixture of broad-leaved species, but rather a poor knowledge of the Sakhalin aquatic flora.
摘要首次列出了萨哈林西南地理植物学区（一个独立的深色针叶林亚区，混有阔叶树种；相当于克里永植物学区）的一些新的水生维管植物物种（Lemna turionifera、Myriophyllum verticillatum、Potamogeton gramineus、P. manchuriensis、Stuckenia pectinata、Utricularia minor 和 U. × ochroleuca）。在南萨哈林低地地质植物区系中还有一种新植物（Myriophyllum spicatum）。所有这些分类群在萨哈林其他地质植物区都有分布。植物学家对西南区的植物区系进行了充分的调查，该区植物区系清单的增加并不表明该亚区的暗针叶林与阔叶树种混杂在一起的独特性，而是表明人们对萨哈林水生植物区系的了解不足。
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Pub Date : 2024-07-13DOI: 10.1134/s1995082924700093
E. B. Mel’nikova, A. V. Melnikov
Abstract
A study of changes in sea surface temperature (SST) on the southwestern shelf of Crimea in 2000–2020 has been conducted. The equations of trends in the change in SST are found. It is shown that, according to the nature of changes in the average annual sea temperature, three periods can be distinguished: 2000–2007, 2008–2013, and 2014–2020. The influence of changes in the average annual SST on the development of pelagic fish of the cold-water complex (using the example of the Black Sea sprat) is considered. Changes in the main parameters of populations and their relationship with the change in the average annual SST are found. It is found that the observed increase in sea temperature negatively affected the development of the sprat population; the average age of the population has decreased by 1.3 times. In general, the population has been rejuvenated, and the average size and weight of individuals has decreased.
{"title":"Influence of Sea Surface Temperature Changes on the Development of Sprat (Sprattus sprattus phalericus (Risso)) (Pisces: Clupeidae) Living on the Southwestern Shelf of Crimea","authors":"E. B. Mel’nikova, A. V. Melnikov","doi":"10.1134/s1995082924700093","DOIUrl":"https://doi.org/10.1134/s1995082924700093","url":null,"abstract":"<h3 data-test=\"abstract-sub-heading\">Abstract</h3><p>A study of changes in sea surface temperature (SST) on the southwestern shelf of Crimea in 2000–2020 has been conducted. The equations of trends in the change in SST are found. It is shown that, according to the nature of changes in the average annual sea temperature, three periods can be distinguished: 2000–2007, 2008–2013, and 2014–2020. The influence of changes in the average annual SST on the development of pelagic fish of the cold-water complex (using the example of the Black Sea sprat) is considered. Changes in the main parameters of populations and their relationship with the change in the average annual SST are found. It is found that the observed increase in sea temperature negatively affected the development of the sprat population; the average age of the population has decreased by 1.3 times. In general, the population has been rejuvenated, and the average size and weight of individuals has decreased.</p>","PeriodicalId":50359,"journal":{"name":"Inland Water Biology","volume":"17 1","pages":""},"PeriodicalIF":0.9,"publicationDate":"2024-07-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141610485","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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