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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">10.29235/1029-8940-2021-66-1-135-146</article-id><article-id custom-type="elpub" pub-id-type="custom">vestib-739</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>Изменение экологического качества воды реки Западная Двина в результате воздействия городских сточных вод</article-title><trans-title-group xml:lang="en"><trans-title>Change in ecological water quality of West Dvina River under the impact of urban waste water</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>Байчоров</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Baitchorov</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Байчоров Владимир Мухтарович, д-р биол. наук, заведующий сектором</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Vladimir M. Baitchorov, D. Sc. (Biol.), Head of the Sector</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">vbaitch@gmail.com</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>Гигиняк</surname><given-names>Ю. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Giginyak</surname><given-names>Y. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гигиняк Юрий Григорьевич, канд. биол. наук, вед. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Yuri G. Giginyak, Ph. D. (Biol.), Leading Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">antarctida_2010@mail.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>Мороз</surname><given-names>М. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Moroz</surname><given-names>M. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мороз Михаил Дмитриевич, канд. биол. наук, вед. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Michael D. Moroz, Ph. D. (Biol.), Leading Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">mdmoroz@bk.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>Гигиняк</surname><given-names>И. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Giginyak</surname><given-names>I. J.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гигиняк Ирина Юрьевна, канд. биол. наук, вед. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Irina J. Giginyak, Ph. D. (Biol.), Leading Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">i.giginyak@gmail.com</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>Корзун</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Korzun</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Корзун Егор Викторович, ст. науч. сотрудник</p><p>ул. Академическая, 27, 220072, г. Минск</p></bio><bio xml:lang="en"><p>Egor V. Korzun, Senior Researcher</p><p>27, Akademicheskaya Str., 220072, Minsk</p></bio><email xlink:type="simple">natrix109@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>2021</year></pub-date><pub-date pub-type="epub"><day>11</day><month>05</month><year>2021</year></pub-date><volume>66</volume><issue>2</issue><fpage>135</fpage><lpage>146</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Байчоров В.М., Гигиняк Ю.Г., Мороз М.Д., Гигиняк И.Ю., Корзун Е.В., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Байчоров В.М., Гигиняк Ю.Г., Мороз М.Д., Гигиняк И.Ю., Корзун Е.В.</copyright-holder><copyright-holder xml:lang="en">Baitchorov V.M., Giginyak Y.G., Moroz M.D., Giginyak I.J., Korzun E.V.</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/739">https://vestibio.belnauka.by/jour/article/view/739</self-uri><abstract><p>В определении качества поверхностных вод и состояния водных экосистем, в первую очередь рек, наряду с физическим и химическим загрязнением все большее значение приобретает анализ гидробиологической составляющей. Целью работы являлась оценка экологического качества речных экосистем при сбросе сточных вод городов Витебск, Полоцк и Новополоцк в р. Западная Двина на основе изучения сообщества макрозообентоса. В исследованных речных створах обитают редкие для Беларуси и охраняемые в Европе виды гидробионтов. Отмечена относительно высокая численность (от 30 до 80 %) реофильных видов Plecoptera, Ephemeroptera и Trichoptera, которые представляют три самые приоритетные индикаторные группы гидробионтов. Определены биотические индексы и рассчитан класс чистоты воды р. Западная Двина. В соответствии с Водной рамочной директивой ЕС качество воды на изученных станциях можно отнести к классам с хорошей и высокой чистотой воды. Сделан вывод, что негативное воздействие сточных вод городов Витебск, Полоцк и Новополоцк имеет весьма локальное значение и оказывает слабое влияние на биоту и экологическое качество воды р. Западная Двина.</p></abstract><trans-abstract xml:lang="en"><p>In determining the quality of surface waters and, first of all, rivers, along with physical and chemical pollution, the analysis of the hydrobiological component of river ecosystems is becoming increasingly important. The aim of the work was to assess the ecological quality of the river ecosystems from the impact of wastewater discharge from the cities of Vitebsk, Polotsk and Novopolotsk on the Western Dvina River based on the macrozoobenthos community. The studied river sections are inhabited by rare for Belarus and protected in Europe species of aquatic organisms. A relatively high abundance (from 30 to 80 %) of the group of rheophilic species Plecoptera, Ephemeroptera, and Trichoptera was noted, which represent the three highest priority indicator groups of aquatic organisms. Biotic indices and the water purity class of the r. Western Dvina were determined. In accordance with the EU Water Framework Directive, the water purity class at the studied stations has a good and high value. It is concluded that the negative impact of wastewater from the cities of Vitebsk, Polotsk and Novopolotsk has a very local significance and weakly affects the biota and the ecological quality of the water of the Western Dvina River already at a distance of 18 km. below the discharge of water from the treatment facilities of the Novopolotsk refinery.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>поверхностные воды</kwd><kwd>речные экосистемы</kwd><kwd>биотические индексы</kwd><kwd>макрозообентос</kwd><kwd>горячие точки</kwd><kwd>экологическое качество</kwd></kwd-group><kwd-group xml:lang="en"><kwd>surface water</kwd><kwd>river ecosystems</kwd><kwd>biotic indices</kwd><kwd>macrozoobenthos</kwd><kwd>hot spots</kwd><kwd>environmental 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">Hassal, A. N. A microscopic examination of the water supplied to the inhabitants of London and the suburban districts / A. N. Hassal. – London : Samuel Highley, 1850. – 69 p.</mixed-citation><mixed-citation xml:lang="en">Hassal A. N. A microscopic examination of the water supplied to the inhabitants of London and the suburban districts. London, Samuel Highley, 1850. 69 p.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Knopp, H. Ein neuer Weg zur Darstellung biologischer Vorfluteruntersuchungen, erlautert an einem Gutelangsschnitt des Maines / H. Knopp // Wasserwirtschaft. – 1954. – Jg. 45. – S. 9–15.</mixed-citation><mixed-citation xml:lang="en">Knopp H. Ein neuer Weg zur Darstellung biologischer Vorfluteruntersuchungen, erlautert an einem Gutelangsschnitt des Maines. Die Wasserwirtschaft, 1954, Jg. 45, S. 9–15.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">Knopp, H. Grundsätzliches zur Frage biologischer Vorfluterungen erlauted an einem Gütelangsschnitt des Mains / H. Knopp // Arch. Hydrobiol. – 1955. – Suppl. 22, Bd. 3/4. – S. 363–368.</mixed-citation><mixed-citation xml:lang="en">Knopp H. Grundsätzliches zur Frage biologischer Vorfluterungen erlauted an einem Gütelangsschnitt des Mains. Archiv fur Hydrobiologie, 1955, Suppl. 22, Bd. 3/4, S. 363–368.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Liebmann, H. Handbuch der Frischwasser und Adwasserbiologie / H. Liebmann. – Munich : R. Oldenburg, 1951. – Bd. 1. – 539 S.</mixed-citation><mixed-citation xml:lang="en">Liebmann H. Handbuch der Frischwasser und Adwasserbiologie. Bd. 1. Munich, R. Oldenburg, 1962. 539 S.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Sládeček, V. System of water quality from the biological point of view / V. Sládeček. – Stuttgart : Schweizerbart, 1973. – 218 p.</mixed-citation><mixed-citation xml:lang="en">Sládeček V. System of water quality from the biological point of view. Stuttgart, Schweizerbart, 1973. 218 p.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Zelinka, M. Zur Präzisierung der biologischen Klassification der Reinheit fliessender Gewässer / M. Zelinka, P. Marvan // Arch. Hydrobiol. – 1961. – Bd. 57, H. 3. – S. 389–407.</mixed-citation><mixed-citation xml:lang="en">Zelinka M., Marvan P. Zur Präzisierung der biologischen Klassification der Reinheit fliessender Gewässer. Archiv für Hydrobiologie, 1961, Bd. 57, H. 3, S. 389–407.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Shannon, C. E. A mathematical theory of communication / C. E. Shannon // Bell Syst. Tech. J. – 1948. – Vol. 27. – P. 379–423, 623–656. https://doi.org/10.1002/j.1538-7305.1948.tb01338.x</mixed-citation><mixed-citation xml:lang="en">Shannon E. E. A mathematical theory of communication. Bell System Technical Journal, 1948, vol. 27, pp. 379–423, 623–656. https://doi.org/10.1002/j.1538-7305.1948.tb01338.x</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Woodiwiss, F. S. The biological system of stream classification used by the Trent River board / F. S. Woodiwiss // Chem. Ind. – 1964. – Vol. 11. – P. 443–447.</mixed-citation><mixed-citation xml:lang="en">Woodiwiss F. S. The biological system of stream classification used by the Trent River board. Chemistry and Industry, 1964, vol. 11, pp. 443–447.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Охрана окружающей среды и природопользование. Аналитический контроль и мониторинг. Правила определения экологического (гидробиологического) статуса речных экосистем : ТКП 17.13-10-2013 (02120) (Рабочий проект, третья редакция). – Минск : Минприроды, 2017. – 13 c.</mixed-citation><mixed-citation xml:lang="en">Environmental protection and nature management. Analytical control and monitoring. Rules for determining the ecological (hydrobiological) status of river ecosystems. Ministry of Natural Resources, TCP. 17.13-ХХ-201Х (02120). Minsk, Ministry of Natural Resources and Environmental Protection, 2017. 13 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Байчоров, В. М. Экологическое качество воды трансграничных рек Полесского региона (Беларусь – Украина) / В. М. Байчоров, Ю. Г. Гигиняк // Проблемы Полесья : материалы Междунар. науч.-практ. конф., Минск, сентябрь 2016 г. – Минск, 2016. – С. 76–79.</mixed-citation><mixed-citation xml:lang="en">Baichorov V. M., Giginyak Yu. G. Ecological water quality of transboundary rivers of the Polesie region (Belarus – Ukraine). Problemy Poles’ya: materialy Mezhdunarodnoi nauchno-prakticheskoi konferentsii, Minsk, sentyabr’ 2016 goda [Polesie Problems: Materials of the International Scientific and Practical Conference, Minsk, September 2016]. Minsk, 2016, pp. 76–79 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Мороз, М. Д. Видовой состав водных беспозвоночных трансграничных водотоков между Беларусью и Литвой / М. Д. Мороз, В. М. Байчоров, Ю. Г. Гигиняк // Природ. ресурсы. – 2017. – № 1. – С. 47–53.</mixed-citation><mixed-citation xml:lang="en">Moroz M. D., Baichorov V. M., Giginyak Yu. G. The species composition of aquatic invertebrates of transboundary watercourses between Belarus and Lithuania. Prirodnye resursy [Natural resources], 2017, no. 1, pp. 47–53 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Мороз, М. Д. Фауна водных беспозвоночных водотоков Национального парка «Беловежская пуща» / М. Д. Мороз, В. М. Байчоров, Ю. Г. Гигиняк // Журн. БГУ. Биология. – 2017. – № 3. – С. 68–75.</mixed-citation><mixed-citation xml:lang="en">Moroz M. D., Baichorov V. M., Giginyak Yu. G. Fauna of aquatic invertebrate watercourses of the National Park “Belovezhskaya Pushcha”. Zhurnal Belorusskogo gosudarstvennogo universiteta. Biologiya = Journal of the Belarusian State University. Biology, 2017, no. 3, pp. 68–75 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Байчоров, В. М. Оценка экологического состояния речных экосистем от воздействия городских стоков на основе индикаторных групп макрозообентоса / В. М. Байчоров, Ю. Г. Гигиняк // Актуальные проблемы охраны животного мира в Беларуси и сопредельных регионах : материалы 1-й Междунар. науч.-практ. конф., Минск, 15–18 окт. 2018 г. / ред.: А. В. Кулак [и др.]. – Минск, 2018. – С. 44–49.</mixed-citation><mixed-citation xml:lang="en">Baichorov V. M., Giginyak Yu. G. Assessment of the ecological state of river ecosystems from the impact of urban runoff based on indicator groups of macrozoobenthos. Aktual’nye problemy okhrany zhivotnogo mira v Belarusi i sopredel’nykh regionakh (Minsk, 15–18 oktyabrya 2018 goda) [Current challenges in Belarus and adjacent regions wildlife protection: materials of the I International scientific and practical conference (Minsk, October 15–18, 2018)]. Minsk, 2018, pp. 44–49 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Мороз, М. Д. Видовой состав водных беспозвоночных реки Вилия / М. Д. Мороз, В. М. Байчоров, Ю. Г. Гигиняк // Вес. НАН Беларусi. Сер. бiял. навук. – 2018. – Т. 63, № 4. – С. 401–408.</mixed-citation><mixed-citation xml:lang="en">Moroz M. D., Baichorov V. M. Giginyak Yu. G. Fauna of aquatic invertebrates of the Viliya river. Vestsі Natsyyanal’nai akademіі navuk Belarusі. Seryya bіyalagіchnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Biological series, 2018, vol. 63, no. 4, pp. 401–408 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy // Offic. J. Eur. Commun. – 2000. – L 327. – P. 1–72.</mixed-citation><mixed-citation xml:lang="en">Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for Community action in the field of water policy. Official Journal of the European Communities, 2000, L 327, pp. 1–72.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Водный кодекс Республики Беларусь [Электронный ресурс] // Национальный правовой Интернет-портал Республики Беларусь. – Режим доступа: http://www.pravo.by/document/?guid=12551&amp;p0=Hk1400149&amp;p1=1 – Дата доступа: 05.12.2019</mixed-citation><mixed-citation xml:lang="en">The Water Code of the Republic of Belarus. National Legal Internet Portal of the Republic of Belarus. Available at: http://www.pravo.by/document/?guid=12551&amp;p0=Hk1400149&amp;p1=1 (accessed 05.12.2019) (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Мороз, М. Д. Каталог поденок (Ephemeroptera), веснянок (Plecoptera) и ручейников (Trichoptera) Беларуси / М. Д. Мороз, Т. П. Липинская. – Минск : Беларус. навука, 2014. – 315 с.</mixed-citation><mixed-citation xml:lang="en">Moroz M. D., Lipinskaya T. P. Catalog of mayflies (Ephemeroptera), stoneflies (Plecoptera) and caddis flies (Trichoptera) of Belarus. Minsk, Belaruskaya navuka Publ., 2014. 315 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Жильцова, Л. А. Веснянки (Plecoptera) Европейской части СССР (без Кавказа) / Л. А. Жильцова // Энтомол. обозрение. – 1966. – Т. 45, № 3. – С. 525–549.</mixed-citation><mixed-citation xml:lang="en">Zhil’tsova L. A. Vesnyanka (Plecoptera) of the European part of the USSR (without the Caucasus). Entomological Review, 1966, vol. 45, no. 3, pp. 525–549 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Жильцова, Л. А. Материалы по фауне веснянок (Plecoptera) / Л. А. Жильцова // Тр. Зоол. Ин-та Акад. наук СССР. – 1962. – Т. 31. – С. 5–12.</mixed-citation><mixed-citation xml:lang="en">Zhil’tsova L. A. Materials on the fauna of Plecoptera. Proceedings of the Zoological Institute of the USSR Academy of Sciences, 1962, vol. 31, pp. 5–12 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Timm, H. Distribution of stoneflies (Insecta: Plecoptera) in Estonia / H. Timm // Proc. Estonia Acad. Sci. Biol. Ecol. – 2000. – Vol. 49, N 3. – P. 277–288.</mixed-citation><mixed-citation xml:lang="en">Timm H. Distribution of stoneflies (Insecta: Plecoptera) in Estonia. Proceedings of the Estonia Academy of Sciences. Biology and Ecology, 2000, vol. 49, no. 3, pp. 277–288.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Старобогатов Я. И. Фауна моллюсков и зоогеографическое районирование континентальных водоемов земного шара / Я. И. Старобогатов. – Л. : Наука, 1970. – 372 с.</mixed-citation><mixed-citation xml:lang="en">Starobogatov Ya. I. Fauna of mollusks and zoogeographic zoning of continental water bodies of the globe. Leningrad, Nauka Publ., 1970, p. 372 (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Лаенко, Т. М. Фауна водных моллюсков Беларуси / Т. М. Лаенко. – Минск : Беларус. навука, 2012. – 128 c.</mixed-citation><mixed-citation xml:lang="en">Laenko T. M. Fauna of aquatic mollusks of Belarus. Minsk, Belaruskaya navuka Publ., 2012. 128 p. (in Russian).</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Beran, L. Mollusca (měkkýši) / L. Beran, L. Juřičrová, M. Horsák // Červený seznam ohrožených druhů České republiky. Bezobratlí / еds. J. Farač, D. Král, M. Škorpík. – Praha, 2005. – P. 69–74.</mixed-citation><mixed-citation xml:lang="en">Beran L., Juřičrová L., Horsák M. Mollusca (měkkýši) Červený seznam ohrožených druhů České republiky. Bezobratlí. Praha, 2005, pp. 69–74.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">The river continuum concept / R. L. Vannote [et al.] // Can. J. Fish. Aquatic Sci. – 1980. – Vol. 37, N 1. – P. 130–137.</mixed-citation><mixed-citation xml:lang="en">Vannote R. L., Minshall G. W., Cummins K. W., Sedell J. R., Cushing C. E. The river continuum concept. Canadian Journal of Fisheries and Aquatic Sciences, 1980, vol. 37, pp. 130–137.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Экологическое качество рек Неман и Вилия при воздействии городских сточных вод / В. М. Байчоров [и др.] // Вес. Нац. aкад. навук Беларусі. Сер. біял. навук. – 2020. – Т. 65, № 1. – С. 16–29.</mixed-citation><mixed-citation xml:lang="en">Baichorov V. M., Giginyak Yu. G., Moroz M. D., Giginyak I. Yu., Korzun E. V. Environmental quality of Neman and Vilia Rivers under the influence of city wastewater. Vestsі Natsyyanal’nai akademіі navuk Belarusі. Seryya bіyalagіchnykh navuk = Proceedings of the National Academy of Sciences of Belarus. Biological series, 2018, vol. 65, no. 1, pp. 16–29 (in Russian).</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>
