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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">10.35885/1684-7318-2020-4-383-397</article-id><article-id custom-type="elpub" pub-id-type="custom">sevin-218</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>Сообщества фитобентоса солёных рек Приэльтонья: таксономическая и количественная структура</article-title><trans-title-group xml:lang="en"><trans-title>Benthos Algae Communities of Saline Rivers in the Lake Elton Basin: Taxonomic and Quantitative Structure</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6014-9841</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горохова</surname><given-names>О. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorokhova</surname><given-names>O. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>445003, Тольятти, Комзина, 10</p></bio><bio xml:lang="en"><p>10 Komzin St., Togliatti 445003</p></bio><email xlink:type="simple">o.gorokhova@yandex.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/0000-0002-3808-4700</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зинченко</surname><given-names>Т. Д.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinchenko</surname><given-names>Т. D.</given-names></name></name-alternatives><bio xml:lang="ru"><p>445003, Тольятти, Комзина, 10</p></bio><bio xml:lang="en"><p>10 Komzin St., Togliatti 445003</p></bio><email xlink:type="simple">zinchenko.tdz@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт экологии Волжского бассейна РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Ecology of the Volga River Basin, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2020</year></pub-date><pub-date pub-type="epub"><day>12</day><month>01</month><year>2021</year></pub-date><volume>0</volume><issue>4</issue><fpage>383</fpage><lpage>397</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Горохова О.Г., Зинченко Т.Д., 2021</copyright-statement><copyright-year>2021</copyright-year><copyright-holder xml:lang="ru">Горохова О.Г., Зинченко Т.Д.</copyright-holder><copyright-holder xml:lang="en">Gorokhova O.G., Zinchenko Т.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://sevin.elpub.ru/jour/article/view/218">https://sevin.elpub.ru/jour/article/view/218</self-uri><abstract><p>Впервые дана оценка таксономической и количественной структуры фитобентоса семи солёных рек бассейна гипергалинного озера Эльтон (Волгоградская область). Выявлены основные типы альгоценозов, развивающихся на субстратах: диатомовый фитобентос, сообщества диатомовых водорослей с цианопрокариотами, цианобактериальные плёнки и маты, эпифитон. Фитобентос состоит из локальных, мозаично распределенных сообществ с малым сходством видового состава. Структуру альгоценозов определяют Bacillariophyta (с преобладанием видов рода Navicula) и Cyanoprokaryota (родов Phormidium, Leptolyngbya, Geitlerinema). Величины численности и биомассы варьируют в широких пределах, достигая наибольших значений (109834 – 417472 млн кл/м2 ; 523.6 – 567.6 г/м2 ) в цианобактериальных сообществах мезогалинных рек при минерализации до 16 – 19 г/л. Минерализация как фактор, влияющий на структуру сообществ, наиболее жестко действует в устьевых участках рек, контролируя состав доминирующих видов. При критических величинах солёности (&gt; 70 г/л) установлены характерные структурные преобразования сообществ по типу замены планктонных и бентосных Bacillariophyta и Cyanoprokaryota на планктонные Chlorophyta (рода Dunaliella) и пикопланктон.</p></abstract><trans-abstract xml:lang="en"><p>For the first time, an assessment was given of the taxonomic and quantitative structure of the phytobenthos of seven saline rivers in the basin of the hypersaline lake Elton (Volgograd Region). Main types of algacenoses developing on substrates were revealed, namely: diatom phytobenthos, communities of diatoms with cyanoprokaryotes, cyanobacterial films and mats, and epiphyton. The phytobenthos consists of local, mosaic-distributed communities with a small similarity of their species composition. The algacenosis structure is determined by Bacillariophyta (with the predominance of species of the genus Navicula) and Cyanoprokaryota (of the genera Phormidium, Leptolyngbya, and Geitlerinema). The abundance and biomass values vary widely, reaching their highest values (109,834–417,472 mln cells/m2 and 523.6–567.6 g/m2 ) in cyanobacterial communities of mesohaline rivers with their salinity up to 16–19 g/L. Mineralization as a factor influencing the structure of communities, most rigidly acts in the estuarine sections of rivers, by controlling the composition of the dominant species. For critical salinity values (&gt; 70 g/L), characteristic structural transformations of communities by the type of replacement of planktonic and benthic Bacillariophyta and Cyanoprokaryota by planktonic Chlorophyta (of the Dunaliella genus) and picoplankton were established.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>фитобентос</kwd><kwd>альгоценоз</kwd><kwd>таксономический состав</kwd><kwd>количественная структура</kwd><kwd>солёные реки</kwd><kwd>озеро Эльтон</kwd></kwd-group><kwd-group xml:lang="en"><kwd>phytobenthos</kwd><kwd>algacenosis</kwd><kwd>taxonomic composition</kwd><kwd>quantitative structure</kwd><kwd>saline rivers</kwd><kwd>Lake Elton</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">Вассер С. П., Кондратьева Н. В., Масюк Н. П., Паламарь-Мордвинцева Г. М., Ветрова З. И., Кордюм Е. Л., Мошкова Н. А., Приходькова Л. П., Коваленко О. В., Ступина В. 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