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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">10.18500/1684-7318-2018-4-379-390</article-id><article-id custom-type="elpub" pub-id-type="custom">sevin-124</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>Численность бактерионейстона и физико-химические особенности поверхностного микрослоя озера Байкал</article-title><trans-title-group xml:lang="en"><trans-title>Bacterioneuston Abundance and Physicochemical Properties of the Surface Microlayer of Lake Baikal</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>Галачьянц</surname><given-names>А. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Galachyants</surname><given-names>Agnia D.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><email xlink:type="simple">agniagal@lin.irk.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Томберг</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Tomberg</surname><given-names>Iina V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Штыкова</surname><given-names>Ю. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Shtykova</surname><given-names>Yulia R.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суханова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sukhanova</surname><given-names>Elena V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суслова</surname><given-names>М. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Suslova</surname><given-names>Maria Yu.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зименс</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Zimens</surname><given-names>Ekaterina A.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Блинов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Blinov</surname><given-names>Vadim V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сакирко</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sakirko</surname><given-names>Maria V.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Домышева</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Domysheva</surname><given-names>Valentina M.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белых</surname><given-names>О. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Belykh</surname><given-names>Olga I.</given-names></name></name-alternatives><bio xml:lang="ru"/><bio xml:lang="en"/><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Лимнологический институт СО РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Limnological Institute of Siberian Branch of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>12</day><month>07</month><year>2019</year></pub-date><volume>0</volume><issue>4</issue><fpage>379</fpage><lpage>390</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Галачьянц А.Д., Томберг И.В., Штыкова Ю.Р., Суханова Е.В., Суслова М.Ю., Зименс Е.А., Блинов В.В., Сакирко М.В., Домышева В.М., Белых О.И., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Галачьянц А.Д., Томберг И.В., Штыкова Ю.Р., Суханова Е.В., Суслова М.Ю., Зименс Е.А., Блинов В.В., Сакирко М.В., Домышева В.М., Белых О.И.</copyright-holder><copyright-holder xml:lang="en">Galachyants A.D., Tomberg I.V., Shtykova Y.R., Sukhanova E.V., Suslova M.Y., Zimens E.A., Blinov V.V., Sakirko M.V., Domysheva V.M., Belykh O.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/124">https://sevin.elpub.ru/jour/article/view/124</self-uri><abstract><p>Водный поверхностный микрослой располагается на границе атмосферы и гидросферы, занимает 70% земной поверхности, покрывая все без исключения водоёмы. Толщина поверхностного микрослоя составляет около 50 мкм. Здесь формируется особое сообщество микроорганизмов, называемое нейстоном. Нами изучена общая численность бактерий в поверхностном микрослое и подповерхностном слое воды озера Байкал методом эпифлюоресцентной микроскопии, а также впервые определены физико-химические особенности поверхностного микрослоя озера. Отбор проб воды проводили по всей акватории озера Байкал в мае – июне 2013 – 2016 гг. и в августе 2013, 2015 и 2016 гг. Пробы поверхностного микрослоя отбирали из лодки металлической сеткой Гарретта (диаметр 26.5 см) преимущественно в условиях штиля. Средние значения общей численности бактерий в поверхностном микрослое колебались в разные года в пределах 0.93 – 1.49×106 кл/мл весной и 1.73 – 2.24×106 кл/мл летом; в подповерхностном слое воды – 0.79 – 0.89×106 кл/мл в мае – июне и 1.15 – 1.4×106 кл/мл в августе. Показано, что существуют достоверные различия и прямая зависимость между общей численностью бактерий нейстона и планктона в летний период. Выявлены различия между химическим составом поверхностного микрослоя и подповерхностного слоя воды во все исследованные сезоны. В поверхностном микрослое наблюдали повышенные концентрации минерального фосфора, органического углерода, кроме того, он характеризовался более высокой мутностью по сравнению с нижележащими слоями воды. Выявлена прямая зависимость между численностью бактерий в поверхностном микрослое и мутностью воды.</p></abstract><trans-abstract xml:lang="en"><p>The aquatic surface microlayer is located at the atmosphere–hydrosphere boundary and occupies 70% of Earth's surface, covering all water bodies. The depth of the surface microlayer is about 50 μm. A special microbial community called neuston is formed there. The total bacterial abundance in the surface microlayer (SML) and underlying waters (UW) of LakeBaikalwas studied using epifluorescence microscopy. Physicochemical features of the surface microlayer of LakeBaikalwere revealed for the first time. The SML was sampled throughout LakeBaikalin May–June of 2013 to 2016 and in August of 2013, 2015 and 2016. SML samples were taken from a boat, mainly during calm weather, using Garrett’s metal mesh screen (a diameter of 26.5 cm). The average values of total bacterial abundance in the SML varied through years within a range of (0.93–1.49)×106 cells/mL in May–June and (1.73–2.24)×106 cells/mL in August; in the UW, at a depth about 15–20 cm, there were (0.79 – 0.89)×106 cells/mL in May– June and (1.15–1.4)×106 cells/mL in August. Significant differences and a direct relationship between the total bacterial abundance in the surface microlayer and underlying waters ofLakeBaikal in the summer period have been shown. Differences between the chemical composition of the surface microlayer and the subsurface water layer in all studied seasons were revealed. The surface microlayer was enriched with PO43-, total organic carbon and suspended particulate matter as compared with the underlying waters. A direct relationship was found between the numbers of bacteria in the surface microlayer and the suspended particulate matter concentration.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>поверхностный микрослой</kwd><kwd>нейстон</kwd><kwd>общая численность бактерий</kwd><kwd>озеро Байкал</kwd></kwd-group><kwd-group xml:lang="en"><kwd>surface microlayer</kwd><kwd>neuston</kwd><kwd>total bacterial abundance</kwd><kwd>Lake Baikal</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания по теме № 0345-2016- 0003 (АААА-А16-116122110061-6) «Микробные и вирусные сообщества в биопленках пресноводных экосистем…» (отбор проб, учет численности культивируемых гетеротрофных бактерий), № 0345-2016-0008 (АААА-А16-116122110065-4) «Оценка и прогноз экологического состояния озера Байкал…» (исследование химического состава воды) и при частичной финансовой поддержке Российского фонда фундаментальных исследований (проект № 18-34-00309) (учет общей численности бактерий).</funding-statement><funding-statement xml:lang="en">The study was carried out within the framework of State Tasks nos. 0345-2016-0003 (АААА-А16-116122110061-6) “Microbial and viral communities in biofilms of freshwater ecosystems…” (sampling, counting the number of cultured heterotrophic bacteria), 0345-2016-0008 (АААА-А16-116122110065-4) “Assessment and prognosis of the ecological state of Lake Baikal...” (analysis of the chemical composition of water), and the Russian Foundation for Basic Research (project no. 18-34-00309) (total bacterial abundance).</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">Атлас Байкала. 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