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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">10.35885/1684-7318-2025-2-210-221</article-id><article-id custom-type="elpub" pub-id-type="custom">sevin-658</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>Пигментные характеристики альгоценозов малых рек северо-западного побережья Ладожского озера</article-title><trans-title-group xml:lang="en"><trans-title>Pigment characteristics of algocenoses in small rivers of the northwestern coast of Lake Ladoga</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2897-7636</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Станиславская</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Stanislavskaya</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Станиславская Елена ВладимировнаЛаборатория гидробиологии Института озероведения</p><p>196105, г. Санкт-Петербург, ул. Севастьянова, д. 9</p></bio><bio xml:lang="en"><p>9 Sevastyanova St., St. Petersburg 196105</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7282-1383</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Афанасьева</surname><given-names>А. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Afanas’eva</surname><given-names>A. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Афанасьева Анна ЛеонидовнаЛаборатория гидробиологии Института озероведения</p><p>196105, г. Санкт-Петербург, ул. Севастьянова, д. 9</p></bio><bio xml:lang="en"><p>9 Sevastyanova St., St. Petersburg 196105</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский Федеральный исследовательский центр РАН, Институт озероведения РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg Federal Research Center of the Russian Academy of Sciences, Institute of Limnology of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>31</day><month>07</month><year>2025</year></pub-date><volume>0</volume><issue>2</issue><fpage>210</fpage><lpage>221</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Станиславская Е.В., Афанасьева А.Л., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Станиславская Е.В., Афанасьева А.Л.</copyright-holder><copyright-holder xml:lang="en">Stanislavskaya E.V., Afanas’eva A.L.</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/658">https://sevin.elpub.ru/jour/article/view/658</self-uri><abstract><p>Приведены данные по пространственной динамике содержания хлорофиллов а, b и с, каротиноидов и пигментных индексов фитопланктона и перифитона малых рек северо-западного побережья Ладожского озера. Содержание хлорофилла а в фитопланктоне рек изменялось от 1.8 до 49.8 мг/м3, в перифитоне – от 8.5 до 262 мкг/г субстр., что соответствует мезотрофному, слабо эвтрофному, а на отдельных участках рек эвтрофному статусу. Концентрация хлорофилла а в фитопланктоне рек Авлога и Вьюн снижалось к устью, в р. Морье оно увеличивалось вниз по течению, в р. Сосновке распределялось достаточно равномерно. Содержание хлорофилла а в обрастаниях рек Авлога и Сосновка возрастало вниз по течению, в реках Морье и Вьюн снижалось. В сумме хлорофиллов в обоих альгоценозах преобладал хлорофилл а (56 – 96%). Соотношения дополнительных пигментов (хлорофиллы b и с) указывали на доминирование зеленых, диатомовых и эвгленовых водорослей в исследованных сообществах. Сопоставление пигментов, каротиноидов, их соотношений и анализ пигментных индексов выявили благоприятные условия для функциональной активности обоих сообществ, что позволило отнести исследованные реки к разряду слабо загрязненных. Для фитопланктона выявлена достоверная связь пигментных характеристик со структурными показателями.</p></abstract><trans-abstract xml:lang="en"><p>Data on the spatial dynamics of the content of chlorophylls a, b and c, carotenoids and pigment indices of phytoplankton and periphyton in small rivers (tributaries of the western coast of Lake Ladoga) are presented. The chlorophyll a content of river phytoplankton varied from 1.8 to 49.8 mg/m3, in periphyton – from 8.5 to 262 µg/g of substrate, that corresponded to a mesotrophic status, and in some river parts – to a eutrophic status. The chlorophyll a content of phytoplankton decreased towards the river mouth in the Avloga and Vyun rivers, in the Morye river it increased downstream, and in the Sosnovka river it was distributed relatively evenly. The chlorophyll a content of periphyton increased downstream in the Avloga and Sosnovka rivers, while in the Morye and Vyun rivers it decreased. In the total of chlorophyll pigments in both algocenoses, chlorophyll a prevailed, its fraction being 56–96%. The ratios of additional pigments (chlorophyll b and c) indicated the predominance of green algae, diatoms, and euglenoid algae in the studied communities. In general, comparison of pigments and carotenoids has revealed favorable conditions for the functional activity of both phytoplankton and periphyton communities, that allows classifying the studied rivers as slightly polluted.  </p></trans-abstract><kwd-group xml:lang="ru"><kwd>малые реки</kwd><kwd>фитопланктон</kwd><kwd>перифитон</kwd><kwd>хлорофиллы а</kwd><kwd>b и с</kwd><kwd>каротиноиды</kwd><kwd>пигментные индексы</kwd><kwd>трофический статус</kwd></kwd-group><kwd-group xml:lang="en"><kwd>small rivers</kwd><kwd>phytoplankton</kwd><kwd>periphyton</kwd><kwd>chlorophylls a</kwd><kwd>b</kwd><kwd>c</kwd><kwd>carotenoids</kwd><kwd>pigment in- dices</kwd><kwd>trophic status</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">Adamovich B. V., Zhukova A. A. 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