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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">sevin</journal-id><journal-title-group><journal-title xml:lang="ru">ПОВОЛЖСКИЙ ЭКОЛОГИЧЕСКИЙ ЖУРНАЛ</journal-title><trans-title-group xml:lang="en"><trans-title>Povolzhskiy Journal of Ecology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1684-7318</issn><issn pub-type="epub">2541-8963</issn><publisher><publisher-name>Федеральное государственное бюджетное учреждение науки Институт проблем экологии и эволюции им. А. Н. Северцова РАН; Товарищество научных изданий КМК.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.35885/1684-7318-2022-4-388-399</article-id><article-id custom-type="elpub" pub-id-type="custom">sevin-379</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group></article-categories><title-group><article-title>Структурные показатели и токсичные виды цианобактерий Псковского озера</article-title><trans-title-group xml:lang="en"><trans-title>Structural indicators and toxic species of cyanobacteria of Pskov Lake</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5553-2296</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Дрозденко</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Drozdenko</surname><given-names>Т. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>  Дрозденко Татьяна Викторовна</p><p>180000, г. Псков, пл. Ленина, д. 2 </p></bio><bio xml:lang="en"><p> Lenin Square, Pskov 180000 </p></bio><email xlink:type="simple">tboichuk@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8524-3997</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Александрова</surname><given-names>С. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Aleksandrova</surname><given-names>S. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>  Александрова Светлана Михайловна</p><p>180000, г. Псков, пл. Ленина, д. 2 </p></bio><bio xml:lang="en"><p> Lenin Square, Pskov 180000 </p></bio><email xlink:type="simple">superkandidat@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9690-8034</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Антал</surname><given-names>Т. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Antal</surname><given-names>T. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p> Антал Тарас Корнелиевич</p><p>180000, г. Псков, пл. Ленина, д. 2 </p></bio><bio xml:lang="en"><p> Lenin Square, Pskov 180000 </p></bio><email xlink:type="simple">taras_an@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6030-7344</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тихомирова</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Tikhomirova</surname><given-names>E. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>  Тихомирова Елена Ивановна</p><p> 410054, г. Саратов, ул. Политехническая, д. 77 </p></bio><bio xml:lang="en"><p> 77 Politekhnicheskaya St., Saratov 410054 </p></bio><email xlink:type="simple">tichomirova_ei@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Псковский государственный университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pskov State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Саратовский государственный технический университет имени Гагарина Ю. А.</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Yuri Gagarin State Technical University of Saratov</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>22</day><month>12</month><year>2022</year></pub-date><volume>0</volume><issue>4</issue><fpage>388</fpage><lpage>399</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Дрозденко Т.В., Александрова С.М., Антал Т.К., Тихомирова Е.И., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Дрозденко Т.В., Александрова С.М., Антал Т.К., Тихомирова Е.И.</copyright-holder><copyright-holder xml:lang="en">Drozdenko Т.V., Aleksandrova S.M., Antal T.K., Tikhomirova E.I.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://sevin.elpub.ru/jour/article/view/379">https://sevin.elpub.ru/jour/article/view/379</self-uri><abstract><p>Исследовались цианобактериальные сообщества Псковского озера в разные сезоны 2021 г. и проведено сравнение с данными 2018 – 2020 годов. Получены сведения о таксономическом составе и количественных характеристиках цианобактерий, показаны виды, токсичные для живых организмов. Всего на четырех постоянных станциях озера зарегистрировано 196 видовых таксонов фитопланктона, 15.8% из которых приходилось на цианобактерии. Наиболее сходными в видовом отношении были цианобактериальные сообщества в летний и осенний периоды. Количественные показатели цианобактерий, такие как численность и биомасса, были минимальными в весенний период, максимальными – в летне-осенний. В каждый из исследованных сезонов года среди обнаруженных цианобактерий присутствовали токсичные и потенциально токсичные виды, принадлежащие родам Anabaena, Aphanizomenon, Lyngbya, Microcystis, Nodularia, Nostoc. Суммарный вклад представителей данных родов в общую численность фитопланктона изменялся от 4.0% весной до 65.0% осенью. В летний период на долю цианобактерий из вышеназванных родов в общей численности микроводорослей приходилось около 40.0%. Наибольшая роль отмечена для водоросли Microcystis aeruginosa (Kützing) Kützing, которая вызывает «цветение» водоемов, а также продуцирует токсин микроцистин, обладающий гепатотоксичностью. Исследование Псковского озера требует постоянного мониторинга содержания цианотоксинов, особенно в осенний период, когда наблюдается максимальное по биомассе содержание цианобактерий, в том числе токсичных видов, что может привести к серьезным последствиям.</p></abstract><trans-abstract xml:lang="en"><p>The cyanobacterial communities of Lake Pskov were studied in several seasons of 2021, and a comparison was made with the data of earlier studies. Data on the taxonomic composition and quantitative characteristics of cyanobacteria have been obtained, and some species toxic to living organisms are shown. 196 species taxa of phytoplankton in total were recorded at four permanent stations of the lake, 15.8% of which were cyanobacteria. The cyanobacterial communities were most similar in terms of the specific composition in summer and autumn. Some quantitative indicators of cyanobacteria, such as their abundance and biomass, were minimal and maximal in spring and summer–autumn, respectively. Toxic and potentially toxic species belonging to the genera Anabaena, Aphanizomenon, Lyngbya, Microcystis, Nodularia, and Nostoc were present among the detected cyanobacteria in each of the studied seasons of the year. The total contribution of representatives of these genera to the total abundance of phytoplankton varied from 4.0% in spring to 65.0% in autumn. In summer, the share of cyanobacteria from the above genera in the total number of microalgae accounted for ~40.0%. The greatest role was noted for the algae Microcystis aeruginosa (Kützing) Kützing, which causes “blooming” of reservoirs and also produces the toxin microcystin with hepatotoxicity. Any study of Lake Pskov requires constant monitoring of the content of cyanotoxins, especially in autumn, when the maximum biomass content of cyanobacteria, including toxic species, is observed, which may lead to serious consequences.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>водные экосистемы</kwd><kwd>фитопланктон</kwd><kwd>экологический мониторинг</kwd><kwd>цианобактериальные сообщества</kwd><kwd>токсины</kwd><kwd>цветение воды</kwd><kwd>эвтрофикация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>aquatic ecosystems</kwd><kwd>phytoplankton</kwd><kwd>environmental monitoring</kwd><kwd>cyanobacterial communities</kwd><kwd>toxins</kwd><kwd>water bloom</kwd><kwd>eutrophication</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда (проект № 20-64-46018)</funding-statement><funding-statement xml:lang="en">The reported study was funded by Russian Science Foundation (project number 20-64- 46018).</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Белякова Р. 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