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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">10.29235/1029-8940-2026-71-2-157-166</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-1014</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>Оценка экологического состояния озер Белорусского Поозерья с использованием индекса Q фитопланктонного сообщества</article-title><trans-title-group xml:lang="en"><trans-title>Assessment of the ecological state of lakes in the Belarusian Lake Region using the Q index of the phytoplankton community</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-9240-7647</contrib-id><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 – мл. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Anastasiya Yu. Karpaeva – Junior Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">stya1@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 Национальной академии наук 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>2026</year></pub-date><pub-date pub-type="epub"><day>30</day><month>04</month><year>2026</year></pub-date><volume>71</volume><issue>2</issue><fpage>157</fpage><lpage>166</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Карпаева А.Ю., 2026</copyright-statement><copyright-year>2026</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/1014">https://vestibio.belnauka.by/jour/article/view/1014</self-uri><abstract><p>В работе представлены результаты оценки экологического состояния 11 озер Белорусского Поозерья различного трофического статуса с использованием индекса Q фитопланктонного сообщества в вегетационные сезоны 2023–2025 гг. Изучены сезонная динамика индекса и его взаимосвязь с ключевыми показателями трофности. Установлено, что индекс Q варьировал в широком диапазоне (от 0,11 до 4,03), демонстрируя сезонную изменчивость: повышение от весны к лету и снижение к осени, что отражает сезонную сукцессию фитопланктона. Наиболее высокие средние значения индекса, соответствующие хорошему качеству вод, зафиксированы в мезотрофных озерах Волос Северный, Волос Южный, тогда как минимальные характерны для гиперэвтрофных озер Великое, Ильменок. Корреляционный анализ выявил статистически значимые отрицательные связи индекса Q с биомассой фитопланктона (ρ = –0,67) и концентрацией общего фосфора (ρ = –0,50), а также положительную связь с прозрачностью воды (ρ = +0,68). Отсутствие значимой корреляции с долей сине-зеленых водорослей подчеркивает комплексный характер индекса, учитывающего вклад всех функциональных групп. Показано, что в гиперэвтрофных озерах индекс стабильно низок вне зависимости от сезона, в то время как в водоемах с более низким трофическим статусом он чувствителен к сезонным перестройкам сообщества. Полученные результаты подтверждают диагностическую ценность Q-индекса как интегрального показателя трофического статуса, но указывают на необходимость учета его сезонной динамики и ограничений, связанных с доминированием отдельных таксонов.</p></abstract><trans-abstract xml:lang="en"><p>The article presents the results of an assessment of the ecological state of 11 lakes of the Belarusian Lake Region with different trophic status using the Q index of the phytoplankton community during the seasons of 2023–2025. The seasonal dynamics of the index and its relationship with key trophic indicators were examined. The Q index was found to vary widely (from 0.11 to 4.03), demonstrating seasonal variability: increasing from spring to summer and decreasing towards autumn, which reflects the seasonal succession of phytoplankton. The highest average index values, corresponding to good water quality, were recorded in mesotrophic lakes Volos Severny, Volos Yuzhny, while the lowest were typical of hypertrophic lakes Velikoye, Ilmenok. Correlation analysis revealed statistically significant negative correlations of the Q index with phytoplankton biomass (ρ = –0.67) and total phosphorus concentration (ρ = –0.50), and a positive correlation with water transparency (ρ = +0.68). The absence of a significant correlation with the proportion of cyanobacteria emphasizes the integrated nature of the index, which accounts for the contribution of all functional groups. It was shown that in hypertrophic lakes, the index remains consistently low regardless of the season, whereas in water bodies with a lower trophic status, it is sensitive to seasonal community rearrangements. The obtained results confirm the diagnostic value of the Q index as an integrative indicator of trophic status, but also highlight the need to consider its seasonal dynamics and limitations associated with the dominance of certain taxa.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>фитопланктон</kwd><kwd>трофический статус</kwd><kwd>индекс Q</kwd><kwd>Белорусское Поозерье</kwd><kwd>качество воды</kwd></kwd-group><kwd-group xml:lang="en"><kwd>phytoplankton</kwd><kwd>trophic status</kwd><kwd>Q index</kwd><kwd>Belarusian Lake Region</kwd><kwd>water quality</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">Корнева, Л. Г. Динамика морфофункциональных групп фитопланктона Рыбинского водохранилища и оценка качества его вод по индексу сообществ / Л. Г. Корневаa, В. В. Соловьева // Водные ресурсы. – 2021. – Т. 48, № 1. – С. 52–60.</mixed-citation><mixed-citation xml:lang="en">Kornevaa L. G., Solov’eva V. V. Dynamics of morphofunctional groups of phytoplankton of the Rybinsk Reservoir and assessment of the quality of its waters using the community index. Vodnye resursy [Water resources], 2021, vol. 48, no. 1, pp. 52–60 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Towards a functional classification of the freshwater phytoplankton / C. S. Reynolds, V. Huszar, C. Kruk [et al.] // Journal of Plankton Research. – 2002. – Vol. 24, N 5. – P. 417–428. https://doi.org/10.1093/plankt/24.5.417</mixed-citation><mixed-citation xml:lang="en">Reynolds C. S., Huszar V., Kruk C., Naselli-Flores L., Melo S. Towards a functional classification of the freshwater phytoplankton. Journal of Plankton Research, 2002, vol. 24, no. 5, pp. 417–428. https://doi.org/10.1093/plankt/24.5.417</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Семенченко, В. П. Экологическое качество поверхностных вод / В. П. Семенченко, В. И. Разлуцкий. – Мн.: Бел. навука, 2010. – 330 с.</mixed-citation><mixed-citation xml:lang="en">Semenchenko V. P., Razlutskii V. I. Ecological quality of surface waters. Minsk, Belaruskaya navuka Publ., 2010. 330 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Лопух, П. С. Общая лимнология: пособие для студентов геогр. фак. / П. С. Лопух, О. Ф. Якушко. – Мн.: БГУ, 2011. – 366 с.</mixed-citation><mixed-citation xml:lang="en">Lopukh P. S., Yakushko O. F. General limnology: a manual for students of the Faculty of Geography. Minsk, Belarusian State University, 2011. 366 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Михеева, Т. М. Методы количественного учета нанофитопланктона (обзор) / Т. М. Михеева // Гидробиологический журнал. – 1989. – Т. 25, № 4. – С. 3–21.</mixed-citation><mixed-citation xml:lang="en">Mikheeva T. M. Methods of quantitative enumeration of nanophytoplankton (review). Gidrobiologicheskii zhurnal [Hydrobiological Jornal], 1989, vol. 25, no. 4, pp. 3–21 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Мордухай-Болтовский, Ф. Д. Методика изучения биогеоценозов внутренних водоемов / Ф. Д. Мордухай-Болтовский. – М.: Наука, 1975. – 240 с.</mixed-citation><mixed-citation xml:lang="en">Mordukhai-Boltovskii F. D. Methodology for studying biogeocenoses of inland water bodies. Moscow, Nauka Publ., 1975. 240 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Определитель пресноводных водорослей СССР: в 14 т. / АН СССР, Ботан. ин-т им. В. Л. Комарова; отв. ред. М. М. Голлербах. – М.: Совет. наука; Л.: Наука, Ленингр. отд-ние, 1951–1983. – 14 т.</mixed-citation><mixed-citation xml:lang="en">Gollerbakh M. M. (ed.). Identifier of freshwater algae of the USSR. 14 vol. Moskva, Sovetskaya nauka Publ., Leningrad, Nauka, Leningradskoe otdelenie Publ., 1951–1983 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Süßwasserflora von Mitteleuropa. Cyanoprokaryota. Oscillatoriales. Süßwasserflora von Mitteleuropa. Cyanoprokaryota. Oscillatoriales / J. Komárek, К. Anagnostidis. – München: Elsevier Spektrum Akademischer Verlag, 2005. – 759 p.</mixed-citation><mixed-citation xml:lang="en">Komárek J., Anagnostidis K. Süßwasserflora von Mitteleuropa. Cyanoprokaryota. Oscillatoriales. München, Elsevier Spektrum Akademischer Verlag, 2005. 759 p.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Use of Phytoplankton Assemblages for Monitoring Ecological Status of Lakes within the Water Framework Directive: The Assemblage Index / J. Padisák, G. Borics, I. Grigorszky, É. Soróczki-Pintér // Hydrobiologia. – 2006. – Vol. 553. – P. 1–14. https://doi.org/10.1007/s10750-005-1393-9</mixed-citation><mixed-citation xml:lang="en">Padisak J., Borics G., Grigorszky I., Soroczki-Pinter E. Use of Phytoplankton Assemblages for Monitoring Ecological Status of Lakes within the Water Framework Directive: The Assemblage Index. Hydrobiologia, 2006, vol. 553, pp. 1–14. https://doi.org/10.1007/s10750-005-1393-9</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Armstrong, G. D. Colonies as defence in the freshwater phytoplankton genus Dinobryon (Chrysophyceae): Ph. D. Thesis / G. D. Armstrong; The University of British Columbia. – Vancouver, 1985. – 178 p.</mixed-citation><mixed-citation xml:lang="en">Armstrong G. D. Colonies as defence in the freshwater phytoplankton genus Dinobryon (Chrysophyceae). Ph. D. Thesis. Vancouver, 1985. 178 p.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Short Communication: Assessing phytoplankton species structure in trophically different water bodies of South Ural, Russia / А. Kostryukova, I. Mashkova, S. Belov [et al.] // Biodiversitas Journal of Biological Diversity. – 2021. – Vol. 22, N 8. – P. 3530–3538. https://doi.org/10.13057/biodiv/d220853</mixed-citation><mixed-citation xml:lang="en">Kostryukova A., Mashkova I., Belov S., Shchelkanova E., Trofimenko V. Short Communication: Assessing phytoplankton species structure in trophically different water bodies of South Ural, Russia. Biodiversitas Journal of Biological Diversity, 2021, vol. 22, no. 8, pp. 3530–3538. https://doi.org/10.13057/biodiv/d220853</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Кулизин, П. В. Опыт использования функциональной классификации фитопланктона для оценки качества воды некоторых левобережных притоков р. Волги (бассейн Чебоксарского водохранилища) / П. В. Кузлин, Е. Л. Воднеева, А. Г. Охапкин // Принципы экологии. – 2020. – Т. 9, № 2. – С. 48–59.</mixed-citation><mixed-citation xml:lang="en">Kulizin P. V., Vodeneeva E. L., Okhapkin A. G. Experience of using functional classification of phytoplankton to assess the water quality of some left-bank tributaries of the Volga River (Cheboksary Reservoir basin). Printsipy ekologii [Principles of Ecology], 2020, vol. 9, no. 2, pp. 48–59 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">The PEG-model of seasonal succession of planktonic events in fresh waters / U. Sommer, Z. M. Gliwicz, W. Lampert, A. Duncan // Archiv für Hydrobiologie. – 1986. – Vol. 106, N 4. – P. 433–471. https://doi.org/10.1127/archivhydrobiol/106/1986/433</mixed-citation><mixed-citation xml:lang="en">Sommer U., Gliwicz, Z. M., Lampert W., Duncan A. The PEG-model of seasonal succession of planktonic events in fresh waters. Archiv für Hydrobiologie, 1986, vol. 106, no. 4, pp. 433–471. https://doi.org/10.1127/archiv-hydrobiol/106/1986/433</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Demir, А. N. Phytoplankton functional groups provide a quality assessment method by the Q assemblage index in Lake Mogan (Turkey) / A. N. Demir, O. Fakioğlu, B. Dural // Turkish Journal of Botany. – 2014. – Vol. 38, N 1. – P. 169–179. https://doi.org/10.3906/bot-1301-60</mixed-citation><mixed-citation xml:lang="en">Demir А. N., Fakioğlu O., Dural, B. Phytoplankton functional groups provide a quality assessment method by the Q assemblage index in Lake Mogan (Turkey). Turkish Journal of Botany, 2014, vol. 38, no. 1, pp. 169–179. https://doi.org/10.3906/bot-1301-60</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Phytoplankton dynamics and structure, and ecological status estimation by the Q assemblage index: a comparative analysis in two shallow Mediterranean lakes / T. O. Sevindik, H. Tunca, A. Gönülol [et al.] // Turkish Journal of Botany. – 2017. – Vol. 41, N 1. – P. 25–36. https://doi.org/10.3906/bot-1510-22</mixed-citation><mixed-citation xml:lang="en">Sevindik T. O., Tunca H., Gönülol A., Gürsoy N., Küçükkaya Ş. N. Phytoplankton dynamics and structure, and ecological status estimation by the Q assemblage index: a comparative analysis in two shallow Mediterranean lakes. Turkish Journal of Botany, 2017, vol. 41, no. 1, pp. 25–36. https://doi.org/10.3906/bot-1510-22</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Ochocka, A. Sensitivity of plankton indices to lake trophic conditions / A. Ochocka, A. Pasztaleniec // Environmental Monitoring and Assessment. – 2016. – Vol. 188. – Art. 622. https://doi.org/10.1007/s10661-016-5634-3</mixed-citation><mixed-citation xml:lang="en">Ochocka A., Pasztaleniec A. Sensitivity of plankton indices to lake trophic conditions. Environmental Monitoring and Assessment, 2016, vol. 188, art. 622. https://doi.org/10.1007/s10661-016-5634-3</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Phytoplankton Community Structure and Its Relationship with Environmental Factors in Nanhai Lake / D. Gong, Z. Guo, W. Wei [et al.] // Diversity. – 2022. – Vol. 14, N 11. – Art. 927. https://doi.org/10.3390/d14110927</mixed-citation><mixed-citation xml:lang="en">Gong D., Guo Z., Wei W., Bi J., Wang Zh., Ji X. Phytoplankton Community Structure and Its Relationship with Environmental Factors in Nanhai Lake. Diversity, 2022, vol. 14, no. 11, art. 927. https://doi.org/10.3390/d14110927</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Трифонова, И. С. Экология и сукцессия озерного фитопланктона / И. С. Трифонова. – Л.: Наука. Ленингр. отд-ние, 1990. – 182 с.</mixed-citation><mixed-citation xml:lang="en">Trifonova I. S. Ecology and succession of lake phytoplankton. Leningrad, Nauka. Leningradskoe otdelenie Publ., 1990. 182 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Функциональная классификация фитопланктона и микробиологические параметры для оценки состояния прибрежных вод Южного Байкала / Д. В. Малашенков, И. В. Мошарова, В. В. Ильинский, С. А. Мошаров // Биология внутренних вод. – 2022. – № 1. – С. 3–13.</mixed-citation><mixed-citation xml:lang="en">Malashenkov D. V., Mosharova I. V., Il’inskii V. V., Mosharov S. A. Functional classification of phytoplankton and microbiological parameters for assessing the state of coastal waters of Southern Baikal. Biologiya vnutrennikh vod [Biology of inland waters], 2022, no. 1, pp. 3–13.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
