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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Geomorfologiâ i paleogeografiâ</journal-id><journal-title-group><journal-title xml:lang="en">Geomorfologiâ i paleogeografiâ</journal-title><trans-title-group xml:lang="ru"><trans-title>Геоморфология и палеогеография</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2949-1789</issn><issn publication-format="electronic">2949-1797</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">660721</article-id><article-id pub-id-type="doi">10.31857/S2949178923040151</article-id><article-id pub-id-type="edn">YCGMKY</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Paleolimnological research in Russia: from Kaliningrad to Kamchatka</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Палеолимнологические исследования в России: от Калининграда до Камчатки</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">LATE GLACIAL AND HOLOCENE HISTORY OF LAKE BOLSHOE MIASSOVO (SOUTHERN URALS) BASED ON DIATOM ANALYSIS OF BOTTOM SEDIMENTS<ext-link ext-link-type="uri" xlink:href="#FN1"><sup>1</sup></ext-link></article-title><trans-title-group xml:lang="ru"><trans-title>Реконструкция истории развития озера Большое Миассово (Южный Урал) в период позднеледниковья и голоцена на основе диатомового анализа донных отложений</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Valieva</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Валиева</surname><given-names>Э. А.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Frolova</surname><given-names>L. A.</given-names></name><name xml:lang="ru"><surname>Фролова</surname><given-names>Л. А.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Palagushkina</surname><given-names>O. V.</given-names></name><name xml:lang="ru"><surname>Палагушкина</surname><given-names>О. В.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nigmatullin</surname><given-names>N. M.</given-names></name><name xml:lang="ru"><surname>Нигматуллин</surname><given-names>Н. М.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nigamatzyanova</surname><given-names>G. R.</given-names></name><name xml:lang="ru"><surname>Нигаматзянова</surname><given-names>Г. Р.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nurgaliev</surname><given-names>D. K.</given-names></name><name xml:lang="ru"><surname>Нургалиев</surname><given-names>Д. К.</given-names></name></name-alternatives><email>Zinnatova.1994@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan (Volga Region) Federal University</institution></aff><aff><institution xml:lang="ru">Казанский (Приволжский) федеральный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-10-01" publication-format="electronic"><day>01</day><month>10</month><year>2023</year></pub-date><volume>54</volume><issue>4</issue><fpage>195</fpage><lpage>206</lpage><history><date date-type="received" iso-8601-date="2025-02-22"><day>22</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Э.А. Валиева, Л.А. Фролова, О.В. Палагушкина, Н.М. Нигматуллин, Г.Р. Нигаматзянова, Д.К. Нургалиев</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Э.А. Валиева, Л.А. Фролова, О.В. Палагушкина, Н.М. Нигматуллин, Г.Р. Нигаматзянова, Д.К. Нургалиев</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Э.А. Валиева, Л.А. Фролова, О.В. Палагушкина, Н.М. Нигматуллин, Г.Р. Нигаматзянова, Д.К. Нургалиев</copyright-holder><copyright-holder xml:lang="ru">Э.А. Валиева, Л.А. Фролова, О.В. Палагушкина, Н.М. Нигматуллин, Г.Р. Нигаматзянова, Д.К. Нургалиев</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2025-10-01"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/2949-1789/article/view/660721">https://journals.eco-vector.com/2949-1789/article/view/660721</self-uri><abstract xml:lang="en"><p id="idm45257551122144">Bottom sediments are the most important “archive” containing information about the development of lake ecosystems. One of the most reliable and widely used methods of studying bottom sediments is diatom analysis (Juze et al., 1949). Currently, it is part of a group of guiding methods used to reconstruct the historical dynamics of the environment and climate (Rudaya et.al., 2012; Palagushkina et.al., 2018). In this work, the history of development of Lake Bolshoe Miassovo (Southern Urals) reconstructed using the taxonomic composition of diatoms found in the 526 cm long sediment core is presented. The maximum age of the sediments in the column was 13<bold> </bold>500 years BP. According to the results of the study, 123 taxa of diatoms belonging to 47 genera were identified in the lake sediments. Diatom analysis of the bottom sediments of the studied lake allowed us to identify the main stages of the evolution of the reservoir during the Late Glacial and Holocene. During ~13<bold> </bold>200–11<bold> </bold>700 yr BP, in the period of a cool climate, the lake was a deep body of water with a constant water level and an extensive zone of shallow waters overgrown with macrophytes; then ~11<bold> </bold>700–8500 cal. years BP against the background of cooling, the water level decreased; from ~8500–4600 cal. years BP was the stage of increasing water level in the lake in a warmer and wetter climate; in the period ~4600–2500 cal. years BP there was an increase in productivity of algal communities; during ~2500–800 cal. years BP against the background of decreasing temperature, a deep lake with low mineralized water, and presence of swampy shallow waters with acidification processes in them is finally formed.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45257551122832">Донные отложения представляют собой важнейший “архив”, содержащий сведения о развитии озерных экосистем. Одним из наиболее надежных и широко используемых методов изучения водных экосистем является диатомовый анализ (Жузе и др., 1949). В настоящее время диатомовый анализ входит в группу руководящих методов, применяемых для реконструкции исторической динамики окружающей среды и климата (Rudaya et al., 2012; Palagushkina et al., 2018). В статье представлены результаты исследования колонки донных отложений длиной 526 см и возрастом 13 500 кал. л. озера Большое Миассово (Южный Урал). Диатомовый анализ донных отложений исследуемого озера позволил выявить 123 таксона водорослей 47 родов и выделить основные этапы эволюции водоема в периоды позднеледниковья и голоцена. В позднеледниковье (~13 200–11 700 кал. л. н.) в условиях прохладного климата озеро представляло собой глубокий водоем с постоянным уровнем воды и обширной зоной мелководий, заросшей макрофитами; в начале голоцена (~11 700–8500 кал. л. н.) на фоне похолодания отмечалось понижение уровня воды; в период с ~8500 по 4600 кал. л. н. в условиях более теплого и влажного климата зафиксировано повышение уровня воды; в период с ~4600 по 2500 кал. л. н. отмечалось повышение продуктивности водорослевых сообществ; с ~2500 по 800 кал. л. н. на фоне понижения температуры окончательно оформилось глубоководное озеро с маломинерализованной водой, наличием заболоченных мелководий с процессами закисления.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Diatom algae</kwd><kwd>Lake Bolshoye Miassovo</kwd><kwd>Southern Urals</kwd><kwd>bottom sediments</kwd><kwd>Late Pleistocene</kwd><kwd>Holocene</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>диатомовые водоросли</kwd><kwd>озеро Большое Миассово</kwd><kwd>Южный Урал</kwd><kwd>донные отложения</kwd><kwd>позднеледниковье</kwd><kwd>голоцен</kwd></kwd-group><funding-group><funding-statement xml:lang="en">We are grateful to all the participants of the expedition for organizing and conducting field work. The diatom ana-lysis was supported by a grant from the Russian Science Foundation (No. 22-47-08001). The statistical analysis was carried out within the framework of the Strategic Academic Leadership Program of Kazan Federal University (Priorities-2030), and also by the subsidy allocated to Kazan Fe-deral University for the state assignment project No. FZSM-2023-0023 in the sphere of scientific activities.</funding-statement><funding-statement xml:lang="ru">Мы благодарны всем участникам экспедиции за организацию и проведение полевых работ. Диатомовый анализ был поддержан грантом Российского научного фонда (№ 22-47-08001). Статистический анализ проведен в рамках Программы стратегического академического лидерства Казанского федерального университета (Приоритеты-2030).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Barinova S.S., Anisimova O.V., Medvedeva L.A. 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