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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">biologyscience</journal-id><journal-title-group><journal-title xml:lang="ru">Тимирязевский биологический журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Timiryazev Biological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-4710</issn><publisher><publisher-name>ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева (ФГБОУ ВО РГАУ-МСХА имени К.А. Тимирязева)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26897/2949-4710-2025-3-3-1-02</article-id><article-id custom-type="elpub" pub-id-type="custom">biologyscience-278</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>1 - БИОЛОГИЧЕСКИЕ РЕСУРСЫ, ЭКОЛОГИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>1 - BIOLOGICAL RESOURCES, ECOLOGY</subject></subj-group></article-categories><title-group><article-title>Зимняя авифауна разнотравно-ковыльной степи (Костанайская область, Карабалыкский район) по результатам маршрутных учетов 2024-2025 гг.</article-title><trans-title-group xml:lang="en"><trans-title>Winter avifauna of the forb-feather grass steppe (Kostanay Region, Karabalyk District) based on route surveys (2024-2025)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5568-9082</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Брагина</surname><given-names>Татьяна Михайловна</given-names></name><name name-style="western" xml:lang="en"><surname>Bragina</surname><given-names>Tatiana M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Брагина Татьяна Михайловна, доктор биологических наук, профессор, профессор кафедры естественно-научных дисциплин, Костанайский региональный университет имени Ахмет Байтұрсынұлы; главный научный сотрудник Азово-Черноморского филиала ГНЦ РФ ФГБНУ «ВНИРО» («АзНИИРХ»)</p></bio><bio xml:lang="en"><p>Tatiana M. Bragina, DSc (Biol), Professor, Professor at the Department of Natural Sciences, Akhmet Baitursynuly Kostanay Regional University; Chief Research Associate, Russian Federal Research Institute of Fisheries and Oceanography (VNIRO), Azov-Black Sea Branch of VNIRO (AzNIIRKH)</p></bio><email xlink:type="simple">tm_bragina@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>Табункин</surname><given-names>Виталий Валерьевич</given-names></name><name name-style="western" xml:lang="en"><surname>Tabunkin</surname><given-names>Vitaliy V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Табункин Виталий Валерьевич, магистрант 2 курса по образовательной программе (ОП) - Геоэкология и управление природопользованием (7M05201), Костанайский региональный университет имени Ахмет Байтұрсынұлы</p></bio><bio xml:lang="en"><p>Vitaliy V. Tabunkin, 2nd year Master's degree student in Geoecology and Environmental Management (7M05201), Akhmet Baitursynuly Kostanay Regional University</p></bio><email xlink:type="simple">tabunkin2003@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Костанайский региональный университет имени Ахмет Байтурсынулы; Всероссийский научно-исследовательский институт рыбного хозяйства и океанографии (ФГБНУ «ВНИРО»), Азово-Черноморский филиал ФГБНУ «ВНИРО» («АзНИИРХ»)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Akhmet Baitursynuly Kostanay Regional University; Russian Federal Research Institute of Fisheries and Oceanography, Azov-Black Sea Branch</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Костанайский региональный университет имени Ахмет Байтурсынулы</institution><country>Казахстан</country></aff><aff xml:lang="en"><institution>Akhmet Baitursynuly Kostanay Regional University</institution><country>Kazakhstan</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>31</day><month>01</month><year>2026</year></pub-date><volume>3</volume><issue>3</issue><elocation-id>278</elocation-id><permissions><copyright-statement>Copyright &amp;#x00A9; Брагина Т.М., Табункин В.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Брагина Т.М., Табункин В.В.</copyright-holder><copyright-holder xml:lang="en">Bragina T.M., Tabunkin V.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://www.bioscience-journal.com/jour/article/view/278">https://www.bioscience-journal.com/jour/article/view/278</self-uri><abstract><p>В условиях изменения климата и роста антропогенной нагрузки изучение биоразнообразия птиц является важным инструментом экологического мониторинга. Несмотря на длительную историю орнитологических исследований в Костанайской области, сфокусированных преимущественно на Наурзумском заповеднике, зимняя авифауна степных регионов, включая понижения рельефа, остается малоизученной. Цель работы – анализ видового состава и структуры зимней авифауны в биотопах понижений рельефа (логах) разнотравно-ковыльной степи на территории Карабалыкского района Костанайской области. Исследования проводились с декабря по февраль (зима 2024-2025 гг.) в трех различных биотопах («Тогузакский лог», «Овраг Сухой», «Лог Большой») маршрутными учетами по методике Ю.С. Равкина (маршруты ≥5 км, без ограничения ширины трансекты). В период наблюдений установлены существенные различия в видовой структуре и доминирующих комплексах авифауны между биотопами, связанные с комплексом факторов (пищевые ресурсы, места гнездований и др.). Доминирующими семействами были: Подорожниковые Calcariidae Ridgway, 1901, с долей 25%; Синицевые Paridae Vigors, 1825, – 18%; Фазановые Phasianidae Horsfield, 1821; Вьюрковые Fringillidae Leach, 1820, – по 11% каждое. Обсуждены лимитирующие факторы формирования зимней авифауны в изучаемых биотопах.</p></abstract><trans-abstract xml:lang="en"><p>In the context of climate change and increasing anthropogenic pressure, the study of avian biodiversity is an important tool for ecological monitoring. Despite a long history of ornithological research in the Kostanay Region, primarily focused on the Naursum Nature Reserve, the winter avifauna of steppe areas, including the depressions in the relief, remains poorly studied. The aim of this study is to analyze the species composition and structure of the winter avifauna in depression biotopes (logs) within the forb-feather grass steppe in the Karabalyk District, Kostanay Region. The research was conducted from December to February (winter 2024-2025) in three different biotopes (Toguzakskiy Log, Ovrag Sukhoy, Log Bolshoy) using route surveys based on the methodology of Yu.S. Ravkin (routes ≥5 km, without transect width restrictions). During the observations, significant differences in species structure and dominant avifauna complexes were established between the biotopes, associated with a complex of factors (food resources, nesting sites, etc.). The dominant families included: Calcaridae Ridgway, 1901, with a share of 25%; Paridae Vigors, 1825, – 18%; Phasianidae Horsfield, 1821; Fringillidae Leach, 1820, – each at 11%. The limiting factors influencing the formation of winter avifauna in the studied biotopes are discussed.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>Авифауна</kwd><kwd>зимние маршрутные учеты</kwd><kwd>разнотравно-ковыльная степь</kwd><kwd>понижения рельефа</kwd><kwd>лимитирующие факторы</kwd><kwd>Карабалыкский район</kwd><kwd>Костанайская область</kwd></kwd-group><kwd-group xml:lang="en"><kwd>Avifauna</kwd><kwd>winter route surveys</kwd><kwd>forb-feather grass steppe</kwd><kwd>depression in the relief</kwd><kwd>limiting factors</kwd><kwd>Karabalyk District</kwd><kwd>Kostanay Region</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">Bardin M.Yu., Platova T.V., Samokhina O.F. Features of observed climate changes in the territory of Northern Eurasia according to regular monitoring data and their possible factors. 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(In Russ.) https://doi.org/10.24412/2712-8628-2024-4-124-132</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>
