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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">vestnik-bio-msu</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Московского университета. Серия 16. Биология</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik Moskovskogo universiteta. Seriya 16. Biologiya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0137-0952</issn><publisher><publisher-name>Lomonosov Moscow State University,  School of Biology</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">vestnik-bio-msu-1162</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>ОРИГИНАЛЬНОЕ ИССЛЕДОВАНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>RESEARCH ARTICLE</subject></subj-group></article-categories><title-group><article-title>Особенности распределения и состояния фитопланктона на разных глубинах в озере Кисло-Сладкое Белого моря</article-title><trans-title-group xml:lang="en"><trans-title>Features of the distribution and condition of phytoplankton at different depths in the Kislo-Sladkoe Lake partly isolated from the White Sea</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6164-5625</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Маторин</surname><given-names>Д. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Matorin</surname><given-names>D. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Маторин Дмитрий Николаевич – докт. биол. наук, проф., вед. науч. сотр. кафедры биофизики биологического факультета</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12Тел.: 8-495-939-35-03</p></bio><bio xml:lang="en"><p>Department of Biophysics</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">dnmatorin@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/0000-0002-7344-0256</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Тодоренко</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Todorenko</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Тодоренко Дарья Алексеевна – канд. биол. наук, науч. сотр. кафедры биофизики биологического факультета</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12Тел.: 8-495-939-35-03</p></bio><bio xml:lang="en"><p>Department of Biophysics</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">dariatodor@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/0000-0002-7870-3393</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Воронов</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Voronov</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Воронов Дмитрий Анатольевич – канд. биол. наук, ст. науч. сотр.</p><p>127051, г. Москва, Большой Каретный переулок, д. 19, стр. 1Тел.: 8-495-939-09-43</p></bio><bio xml:lang="en"><p>127051, Moscow, 19–1 Bol’shoy Karetnyy pereulok</p></bio><email xlink:type="simple">da_voronov@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4004-4270</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горячев</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Goryachev</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Горячев Сергей Николаевич – канд. биол. наук, вед. науч. сотр. кафедры биофизики биологического факультета</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12Тел.: 8-495-939-11-15</p></bio><bio xml:lang="en"><p>Department of Biophysics</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">goryachev156@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0511-7983</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Братковская</surname><given-names>Л. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Bratkovskaya</surname><given-names>L. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Братковская Любовь Борисовна – канд. биол. наук, вед. науч. сотр. кафедры общей экологии и гидробиологии биологического факультета</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12Тел.: 8-495-939-25-18</p></bio><bio xml:lang="en"><p>Department of General Ecology and Hydrobiology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">profkom-bio@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/0000-0002-3962-5564</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Краснова</surname><given-names>Е. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Krasnova</surname><given-names>E. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Краснова Елена Дмитриевна – канд. биол. наук, ст. науч. сотр. Беломорской биологической станции им. Н.А. Перцова биологического факультета</p><p>119234, г. Москва, Ленинские горы, д. 1, стр. 12Тел.: 8-495-939-42-33</p></bio><bio xml:lang="en"><p>N.A. Pertsov White Sea Biological Station, Faculty of Biology</p><p>1–12 Leninskie gory, Moscow, 119234</p></bio><email xlink:type="simple">e_d_krasnova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Московский государственный университет имени М.В. Ломоносова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Lomonosov Moscow State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт проблем передачи информации имени А.А. Харкевича, Российская академия наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>A.A. Kharkevich Institute for Information Transmission Problems, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>20</day><month>08</month><year>2022</year></pub-date><volume>77</volume><issue>3</issue><fpage>180</fpage><lpage>187</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Маторин Д.Н., Тодоренко Д.А., Воронов Д.А., Горячев С.Н., Братковская Л.Б., Краснова Е.Д., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Маторин Д.Н., Тодоренко Д.А., Воронов Д.А., Горячев С.Н., Братковская Л.Б., Краснова Е.Д.</copyright-holder><copyright-holder xml:lang="en">Matorin D.N., Todorenko D.A., Voronov D.A., Goryachev S.N., Bratkovskaya L.B., Krasnova E.D.</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://vestnik-bio-msu.elpub.ru/jour/article/view/1162">https://vestnik-bio-msu.elpub.ru/jour/article/view/1162</self-uri><abstract><p>Флуоресцентные методы были применены в исследовании фитопланктона стратифицированного озера Кисло-Сладкое на беломорском побережье в 2018 г. В хемоклине водоема (на границе аэробной и анаэробной зон) на глубине 3,3 м наблюдался красный слой воды с концентрацией хлорофилла а 1,7 мкг/л. В этом слое воды доминировали криптофитовые водоросли (Rhodomonas sp.), у которых зафиксирована высокая активность фотосинтетического аппарата по параметрам флуоресценции (PIABS), выраженная через высокие значения квантового выхода первичной фотохимической реакции в фотосистеме 2 (FV / FM), доли активных реакционных центров (РЦ) (RC/ABS) и квантового выхода электронного транспорта в фотосистеме 2(φEo). Высокая фотосинтетическая активность криптофитовых водорослей в зоне хемоклина может свидетельствовать об их устойчивости к присутствию сероводорода. В поверхностном слое воды у фитопланктона отмечалась более низкая фотосинтетическая активность. Опыты с фотоингибированием показали, что сообщество фитопланктона из хемоклина, несмотря на повышенную светочувствительность, характеризуется высокой репарационной способностью фотосинтетического аппарата после фотоокислительного стресса. Предлагается использование флуоресцентных методов для изучения состояния фитопланктона в прибрежных меромиктических водоемах.</p></abstract><trans-abstract xml:lang="en"><p>Chlorophyll fluorescence methods were used for study of phytoplankton in the Kislo-Sladkoe Lake on the White Sea coast in 2018. In the chemocline (between aerobic and anaerobic zones) of the lake at a depth of 3.3 m a red water layer was observed with chlorophyll a concentration of 1.7 μg/L, despite the presence of hydrogen sulfide. This water layer was dominated by cryptophyte algae (Rhodomonas sp.), in which a high functional activity of the photosynthetic apparatus was observed in terms of the PIABS fluorescence parameter, expressed through high values of the quantum yield of the primary photochemical reaction in PS2 (FV / FM), the proportion of active RCs (RC/ABS), and the quantum yield of electron transport in PS2(φEo). Such a high functional activity of the photosynthetic apparatus of cryptophyte algae in the chemocline may indicate the resistance of cryptophyte algae to the presence of hydrogen sulfide. By comparison, the phytoplankton in the surface water layer showed lower photosynthetic activity. Experiments with photoinhibition showed that the chemocline phytoplankton community is characterized by a greater reparative capacity after photooxidative stress despite the increased photosensitivity. Application of chlorophyll fluorescence methods for study of the state of phytoplankton in stratified meromictic water bodies is proposed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Белое море</kwd><kwd>прибрежные меромиктические водоемы</kwd><kwd>фитопланктон</kwd><kwd>фотосинтез</kwd><kwd>фотоингибирование</kwd><kwd>флуоресценция хлорофилла</kwd></kwd-group><kwd-group xml:lang="en"><kwd>White Sea</kwd><kwd>coastal meromictic water bodies</kwd><kwd>phytoplankton</kwd><kwd>photosynthesis</kwd><kwd>photoinhibition</kwd><kwd>chlorophyll fluorescence</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при поддержке Междисциплинарной научно-образовательной школы МГУ имени М.В. Ломоносова «Будущее планеты и глобальные изменения окружающей среды», Российского научного фонда (проект № 20-64-46018) и Российского фонда фундаментальных исследований (проект № 20-04-00465).</funding-statement><funding-statement xml:lang="en">The research was carried with the support of the Interdisciplinary Scientific and Educational School of Moscow State University. M.V. Lomonosov “The Future of the Planet and Global Environmental Changes”, the Russian Science Foundation (project number 20-64-46018) and the Russian Foundation for Basic Research (project number 20-04-00465).</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">Krasnova E.D., Pantyulin A.N., Belevich T.A., Voronov D.A., Demidenko N.A., Zhitina L.S., Ilyash L.V., Kokryatskaya N.M., Lunina O.N., Mardashova M.V., Prudkovsky A. A., Savvichev A.S., Filippov A.S., Shevchenko V.P. 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