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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Bulletin of the Russian Geographical Society</journal-id><journal-title-group><journal-title xml:lang="en">Bulletin of the Russian Geographical Society</journal-title><trans-title-group xml:lang="ru"><trans-title>Известия Русского географического общества</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0869-6071</issn><issn publication-format="electronic">3034-5383</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">681372</article-id><article-id pub-id-type="doi">10.31857/S0869607124040129</article-id><article-id pub-id-type="edn">MNTNLJ</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Features of Distribution and Morphometric Characteristics of Beaver Dams and Ponds in Small Rivers of the Uplands of the Steppe Zone of the Volga Region, European Russia</article-title><trans-title-group xml:lang="ru"><trans-title>Особенности размещения и морфометрические характеристики бобровых плотин и прудов на малых реках возвышенностей степной зоны Поволжья</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharifullin</surname><given-names>Aidar G.</given-names></name><name xml:lang="ru"><surname>Шарифуллин</surname><given-names>Айдар Гамисович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate of Geographical Sciences, Associate Professor of the Department of Landscape Ecology of the Institute of Environmental Sciences</p></bio><bio xml:lang="ru"><p>кандидат географических наук, доцент кафедры ландшафтной экологии, Институт экологии и природопользования</p></bio><email>AGSharifullin@kpfu.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gusarov</surname><given-names>Artyom V.</given-names></name><name xml:lang="ru"><surname>Гусаров</surname><given-names>Артем Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Candidate of Geographical Sciences, Associate Professor, Senior researcher, Scientific research center “Digital Earth” of the Institute of Geology and Petroleum Technologies</p></bio><bio xml:lang="ru"><p>кандидат географических наук, доцент, старший научный сотрудник НИЦ “Цифровая Земля”, Институт геологии и нефтегазовых технологий</p></bio><email>avgusarov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan Federal University</institution></aff><aff><institution xml:lang="ru">Казанский федеральный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-12-26" publication-format="electronic"><day>26</day><month>12</month><year>2024</year></pub-date><volume>156</volume><issue>4</issue><fpage>423</fpage><lpage>440</lpage><history><date date-type="received" iso-8601-date="2025-05-30"><day>30</day><month>05</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Российская академия наук</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/0869-6071/article/view/681372">https://journals.eco-vector.com/0869-6071/article/view/681372</self-uri><abstract xml:lang="en"><p>Beavers, as mammals that have a unique ability to transform watercourses and their floodplain-channel complexes by building dams and associated ponds, intensively develop streams and, especially, small rivers, as well as small branches of larger rivers in Eastern Europe. During a geodetic survey using GNSS equipment and a field survey of four small rivers in the uplands of the steppe zone of the Volga region, the features of the distribution of beaver dams and associated ponds were identified, and some of their morphometric characteristics (height and length of dams and their ratio; length of ponds) were determined. An analysis of the longitudinal profiles of these rivers showed the significant role of slopes (gradients) in the distribution of these beaver structures: about 90% of them are located on riverbed slopes of less than 2%, including 56% of less than 1%. A weak and statistically insignificant trend of increasing height of beaver dams, as well as a statistically significant trend of decreasing length of beaver dams and associated ponds as riverbed slopes increase, was identified. The highest average heights of beaver dams are confined to those small rivers whose basin soils are comparatively heavily plowed (mainly clayey-loamy Chernozems).</p></abstract><trans-abstract xml:lang="ru"><p>Бобры как млекопитающие, которые обладают уникальной способностью преобразовывать водотоки и их пойменно-русловые комплексы путем строительства плотин и связанных с ними прудов, интенсивно осваивают ручьи и особенно малые реки, а также небольшие протоки более крупных рек Восточной Европы. В ходе геодезической съемки с помощью GNSS-оборудования и полевого обследования четырех малых рек возвышенностей степной зоны Поволжья выявлены особенности размещения бобровых плотин и связанных с ними прудов, а также определены их некоторые морфометрические характеристики (высота и длина плотин, и их соотношение; длина прудов). Анализ продольных профилей рек показал существенную роль уклонов в размещении указанных бобровых сооружений: около 90% их расположено на уклонах речных русел менее 2%, в том числе 56% — менее 1%. Выявлена слабая и статистически незначимая тенденция увеличения высоты бобровых плотин, а также статистически значимый тренд уменьшения длины бобровых плотин и связанных с ними прудов по мере роста уклонов русел. Наибольшие средние высоты бобровых запруд приурочены к тем малым рекам, земли бассейнов которых значительно распаханы (преимущественно глинисто-суглинистые черноземы).</p></trans-abstract><kwd-group xml:lang="en"><kwd>Castor fiber L.</kwd><kwd>GNSS receiver</kwd><kwd>riverbed</kwd><kwd>floodplain</kwd><kwd>longitudinal river profile</kwd><kwd>East European Plain</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Castor fiber L.</kwd><kwd>GNSS-приемник</kwd><kwd>русло</kwd><kwd>пойма</kwd><kwd>продольный профиль реки</kwd><kwd>Восточно-Европейская равнина</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>22-77-10087</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Geograficheskij atlas Orenburgskoj oblasti. 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