Algologia最新文献

{"title":"Sphaeroplea soleirolii (Duby) Montagne ex Kütz. (Chlorophyta) – the first record for Ukraine","authors":"O. Burova, A. Gromakova, M.D. Zhezhera","doi":"10.15407/alg34.02.160","DOIUrl":"https://doi.org/10.15407/alg34.02.160","url":null,"abstract":"The paper discusses the data regarding the first discovery of Sphaeroplea soleirolii within the territory of Ukraine. The identified species falls under the genus Sphaeroplea, family Sphaeropleaceae, order Sphaeropleales, class Chlorophyceae, and division Chlorophyta. The distinctive characteristics of algae within this genus encompass the cell wall ornamentation of mature oospores, spore size and shape, and to a lesser extent, variations in the morphology of vegetative cells, including cell dimensions, chloroplast structure, and transverse partitions. Representatives of the genus Sphaeroplea are typically found in shallow ephemeral freshwater (occasionally brackish) reservoirs characterized by extended periods of drying out. As per contemporary understanding, the genus comprises 11 species (with 18 intraspecific taxa), of which only two (S. annulina and S. wilmanii) have been documented in Ukraine based on literature. S. soleirolii was first observed in Ukraine during the spring of 2023 on a temporarily flooded area in the city of Zmiiv (Chuguiv District, Kharkiv Region). The paper provides a morphological description of the identified specimens, accompanied by original photomicrographs. Additionally, comprehensive information on the global distribution of the species is presented.","PeriodicalId":514501,"journal":{"name":"Algologia","volume":"97 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141389570","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Plankton and contour algal communities in the ukrainian section of the Western Bug River and its tributaries","authors":"V. Shcherbak, N. Semeniuk, O.A. Davydov, E. Koziychuk","doi":"10.15407/alg34.02.130","DOIUrl":"https://doi.org/10.15407/alg34.02.130","url":null,"abstract":"The taxonomic diversity of algae in the Western Bug River and its tributaries during the low-water summer-autumn season comprised 303 species (318 intraspecies taxa, ist) from 131 genera, 74 families, 45 orders, 16 classes and 8 phyla. Bacillariophyta dominated, Chlorophyta were recorded as subdominants. The phytoplankton taxonomic diversity included 140 ist, microphytobenthos – 191, phytoperiphyton – 172. The floristic nucleus of algal communities was formed by 17 families. In phytoplankton the highest rank belonged to Scenedesmaceae, while in contour algal communities – Naviculaceae. The highest floristic similarity was observed for microphytobenthos and phytoperiphyton, and the highest dissimilarity – for phytoplankton and phytoperiphyton. The spatial differentiation between contour and plankton communities during the low-water period, rather high similarity of their floristic structure indicate the unity of structural organization of algae from different ecological groups as an important component of biodiversity in the transboundary rivers. According to geographic distribution cosmopolites dominated; according to flow and oxygen regime – indifferents; according to pH preference – alkaliphilic and indifferent species; according to salinity preference – indifferent species; according to saprobiological characteristics – χ-ο- and β-mesosaprobic species. According to biotopic preference eurytopic and benthic forms prevailed. The dialectic unity between contour algal communities and phytoplankton to a great extent depends on morphometric and hydrological characteristics of the rivers under study. High taxonomic diversity, clearly marked spatial differentiation between planktonic and contour communities, interesting species of Bacillariophyta – all these features are indicative of the uniqueness and importance of algae in forming the biodiversity of the transboundary Western Bug River and its tributaries as the components of the EU hydrological network.","PeriodicalId":514501,"journal":{"name":"Algologia","volume":"94 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141389371","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reaction of planktonic and benthic algae in the Black Sea to the consequences of the destruction of the Kakhovska Reservoir dam on the Dnipro River (Ukraine)","authors":"G. Minicheva, O.P. Garkusha, K. Kalashnik, G.V. Marinets, Y.V. Sokolov","doi":"10.15407/alg34.02.104","DOIUrl":"https://doi.org/10.15407/alg34.02.104","url":null,"abstract":"The paper presents the results of study of the effects of the destruction of the Kakhovka dam on the Black Sea phytoplankton and phytobenthos. As a result of dam blast, unprecedented event took place: a huge volume of fresh water with a high concentration of nutrients and pollutants was dumped into the marine ecosystem. Field observations were conducted in the coastal zone of the Odesa Bay and in the open part of the northwestern part of the Black Sea (NWPB) using satellite technologies, in the period of June–August 2023. The object of research were communities of phytoplankton, micro- and macrophytobenthos. The metods include classical indices of marine algae assessment, analysis of satellite data and a holistic approach using universal morpho-functional indicators. The highest values both of chlorophyll a concentration and the ratio of water bloom area to the total area of the Ukrainian sector of the NWPB were recorded from the middle to the end of July 2023. For coastal phytoplankton, the maximum values of quantitative quantitative indicators of diatoms were noted one week after the catastrophe, of cyanoprokaryotes – two weeks later. Functioning of algae with different ecological activity (S/W of phytoplankton – 964.9, microepiphyton – 542.6, macrophytes – 80.9 (m2∙kg-1) optimizes the mechanism of restoration of the marine ecosystem to the state before the disaster. Temporary wave-like outbreaks of the development of planktonic and benthic algae in conditions of unlimited availability of nutrients in the marine environment were revealed. The half-period of the wave of phytoplankton growth according to the value of the Surface Index (SI, unit) is reached in approximately 3 weeks. In the maximum phase of water bloom the development of macrophytobenthos is inhibited As the intensity of the bloom fades, the conditions for the further development of benthic macroalgae are restored. The half-period of the wave of phytobenthos development (according to the IP value) is approximately 5 weeks.","PeriodicalId":514501,"journal":{"name":"Algologia","volume":"96 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141389494","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cyanobacteria of Ukraine: taxonomic structure of the flora 2024","authors":"O. Vinogradova","doi":"10.15407/alg34.02.91","DOIUrl":"https://doi.org/10.15407/alg34.02.91","url":null,"abstract":"Systematics of cyanobacteria experiencing a period of rapid changes associated with the appearance of new molecular markers, the improvement of molecular phylogenetic methods, and widely used polyphasic approach. Many characters previously considered taxonomically significant have been found to have repeatedly arisen in different phylogenetic lineages during the evolution of cyanobacteria, and genetic diversity of taxa often greatly exceeds their morphological diversity. Attempts to combine the approaches of morphological taxonomy with molecular data did not solve the problem, although they helped to systematize the results of floristic studies. The emergence of a new classification system of cyanobacteria (NCSC), in which the authors relied on genomic phylogeny, determined the need to revise the taxonomic structure of the flora of cyanobacteria of Ukraine, since its last published version, based on taxonomic information as of 2021, no longer corresponds to the modern classification of cyanobacteria. The paper analyzes the main innovations of the NCSC and the changes that have occurred with the leading taxa of the Ukrainian flora, and also provides an updated taxonomic structure of the cyanobacteria of Ukraine.","PeriodicalId":514501,"journal":{"name":"Algologia","volume":"102 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141389337","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}