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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">vestib</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия биологических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Biological Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1029-8940</issn><issn pub-type="epub">2524-230X</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1029-8940-2023-68-2-136-146</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-870</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></article-categories><title-group><article-title>Сезонные изменения таксономической структуры и численности фитопланктона в пелагиали и литорали озера Обстерно</article-title><trans-title-group xml:lang="en"><trans-title>Seasonal changes in the taxonomical structure and abundance of phytoplankton in the pelagial and littoral zones of Obsterno Lake</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Карпаева</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Karpaeva</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Карпаева Анастасия Юрьевна – бакалавр, магистрант, мл. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Anastasiya Yu. Karpaeva – Bachelor, Undergraduatestudent, Junior Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">karpaevanastya1@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-практический центр НАН Беларуси по биоресурсам</institution></aff><aff xml:lang="en"><institution>Scientific and Practical Center of the National Academy of Sciences of Belarus for Bioresources</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>05</day><month>05</month><year>2023</year></pub-date><volume>68</volume><issue>2</issue><fpage>136</fpage><lpage>146</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Карпаева А.Ю., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Карпаева А.Ю.</copyright-holder><copyright-holder xml:lang="en">Karpaeva A.Y.</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://vestibio.belnauka.by/jour/article/view/870">https://vestibio.belnauka.by/jour/article/view/870</self-uri><abstract><p>Изучены сезонные изменения таксономического состава и численности фитопланктона в литорали и пелагиали оз. Обстерно. Установлены характерные различия для литорали и пелагиали. Так, численность фитопланктона в литоральной зоне была выше в апреле, августе и декабре, в остальные месяцы она была выше в пелагической зоне. В эти же месяцы было выше и его видовое богатство в литоральной зоне. На выявленные различия в наибольшей степени влияло как количество биогенных элементов (азота и фосфора), так и температурный фактор. </p></abstract><trans-abstract xml:lang="en"><p>We studied the seasonal changes in the taxonomic composition and abundance of phytoplankton in the littoral and pelagial zones of Obsterno Lake. A number of important differences recorded for the littoral and pelagic zones. The abundance in the littoral zone is higher in April, August and December. In other months it is higher in the pelagic zone. In the same months, the species richness in the littoral zone is also higher. These differences were influenced by such factors as biogenic elements (nitrogen and phosphorus), as well as the temperature factor. </p></trans-abstract><kwd-group xml:lang="ru"><kwd>фитопланктон</kwd><kwd>сезонная динамика</kwd><kwd>видовой состав</kwd><kwd>численность</kwd><kwd>литораль</kwd><kwd>пелагиаль</kwd></kwd-group><kwd-group xml:lang="en"><kwd>phytoplankton</kwd><kwd>seasonal dynamics</kwd><kwd>species composition</kwd><kwd>abundance</kwd><kwd>littoral</kwd><kwd>pelagial</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Лепская, Е. В. Фитопланктон в экосистеме озера Курильское: автореф. дис. ... канд. биол. наук : 03.00.18 / Е. В. Лепская ; Камчатский научно-исследовательский институт рыбного хозяйства и океанографии. – Владивосток, 2004. – 23 с.</mixed-citation><mixed-citation xml:lang="en">Lepskaya E. V. Phytoplankton in the ecosystem of Lake Kurilskoye. 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