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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">Environmental Dynamics and Global Climate Change</journal-id><journal-title-group><journal-title xml:lang="en">Environmental Dynamics and Global Climate Change</journal-title><trans-title-group xml:lang="ru"><trans-title>Environmental Dynamics and Global Climate Change</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2218-4422</issn><issn publication-format="electronic">2541-9307</issn><publisher><publisher-name xml:lang="en">Yugra State University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">677932</article-id><article-id pub-id-type="doi">10.18822/edgcc677932</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Experimental works</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные работы</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">Нydrochemical differentiation in bog ecosystems</article-title><trans-title-group xml:lang="ru"><trans-title>Нydrochemical differentiation in bog ecosystems</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name><surname>Litvinov</surname><given-names>L. V.</given-names></name><address><country country="RU">Russian Federation</country></address><email>l.l.v.86@icloud.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Zarov</surname><given-names>E. A.</given-names></name><address><country country="RU">Russian Federation</country></address><email>l.l.v.86@icloud.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name><surname>Ivanova</surname><given-names>I. S.</given-names></name><address><country country="RU">Russian Federation</country></address><email>l.l.v.86@icloud.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Yugra state university</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Югорский государственный университет»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-07-10" publication-format="electronic"><day>10</day><month>07</month><year>2025</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>69</fpage><lpage>80</lpage><history><date date-type="received" iso-8601-date="2025-04-01"><day>01</day><month>04</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Litvinov L.V., Zarov E.A., Ivanova I.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Литвинов Л.В., Заров Е.А., Иванова И.С.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Litvinov L.V., Zarov E.A., Ivanova I.S.</copyright-holder><copyright-holder xml:lang="ru">Литвинов Л.В., Заров Е.А., Иванова И.С.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://edgccjournal.org/EDGCC/article/view/677932">https://edgccjournal.org/EDGCC/article/view/677932</self-uri><abstract xml:lang="en"><p>Oligotrophic bogs are presented by a combination of microlandscapes with varying water tables and vegetation. The variability of these features may influence the rate of plant residue decomposition and the efficiency of biogenic compounds accumulation. These processes affect the formation of the microlandscape hydrochemical system and the bog. This study examines the variability of hydrochemical features in the main microlandscapes of the Mukhrino oligotrophic bog, located in the middle taiga subzone of Western Siberia. The study aim was to identify the distinctive features of bog water composition. The measured properties included concentrations of cations (Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+)</sup> and anions (Cl<sup>–</sup>, SO<sub>4</sub><sup>2–</sup>, PO<sub>4</sub><sup>3–</sup>, NO<sub>3</sub><sup>–) </sup>dissolved organic carbon (DOC) and its spectral characteristics (SUVA<sub>254</sub>) . The dominant ions in the water are Na<sup>+</sup> и K<sup>+</sup> and Cl⁻ and Cl<sup>–</sup> и SO<sub>4</sub><sup>2–. </sup>Relative to the total measured ion concentrations, the ecosystems form the following order of increasing compound concentration: <italic>ryam-hollow</italic> complex (RHC) – open bog – ridge<italic>-hollow-pool</italic> complex (RHPC) – ridge<italic>-hollow</italic> complex (RHC) – typical <italic>ryam</italic>. A hydrochemical feature of the RHK is high DOC concentrations with low ion content. The open bog ecosystems are characterized by a cation composition dominated by K<sup>+</sup> and NH<sub>4</sub><sup>+</sup>. The GHPC exhibit elevated SO<sub>4</sub><sup>2–</sup> in the anionic composition, whereas the RHC areas show higher Cl<sup>–</sup>. concentrations. However, the waters of both ecosystems demonstrate low dissolved organic carbon (DOC) concentrations (71.3 and 66.1 mg/L, respectively). The typical <italic>ryam</italic> stands out with the highest DOC (85,8 mg/L) and measured ion concentrations.</p></abstract><trans-abstract xml:lang="ru"><p>Олиготрофные болота представлены совокупностью микроландшафтов с изменяющимися глубиной залегания болотных вод и растительностью. Изменчивость данных условий способна влиять на скорость деструкции растительных остатков и эффективность биогенной аккумуляции соединений. Эти процессы оказывают влияние на формирование гидрохимической системы микроландшафта и болота в целом. В работе рассмотрена вариабельность гидрохимических характеристик основных микроландшафтов олиготрофного болота Мухрино, расположенного в подзоне средней тайги Западной Сибири. Целью исследования было выявление характерных особенностей формирования состава болотной воды. В качестве измеряемых параметров были выбраны концентрации катионов Na<sup>+</sup>, NH<sub>4</sub><sup>+</sup>, K<sup>+</sup>, Mg<sup>2+</sup>, Ca<sup>2+</sup> и анионов Cl<sup>–</sup>, SO<sub>4</sub><sup>2–</sup>, PO<sub>4</sub><sup>3–</sup>, NO<sub>3</sub><sup>–</sup>, растворённого органического углерода (РОУ) и его спектральные характеристики (SUVA<sub>254</sub>). Преобладающими ионами в болотных водах являются катионы Na<sup>+</sup> и K<sup>+</sup> и анионы Cl<sup>–</sup> и SO<sub>4</sub><sup>2–</sup>. Относительно суммы концентраций измеряемых ионов экосистемы формируют ряд: рямово-мелкомочажинный комплекс (РММК) – открытое болото – грядово-мочажинно-топяной комплекс (ГМТК) – грядово-мочажинный комплекс (ГМК) – типичный рям в порядке увеличения содержания соединений. Гидрохимической особенностью РММК являются высокие концентрации РОУ при низком содержании ионов. Характерным отличием экосистем открытого болота является формирование катионного состава преимущественно за счёт K<sup>+</sup> и NH<sub>4</sub><sup>+</sup>. Участки ГМТК характеризуются повышенным содержанием SO<sub>4</sub><sup>2–</sup> в анионном составе воды, тогда как на участках ГМК наблюдаются более высокие концентрации ионов Cl<sup>–</sup>. Тем не менее воды обеих экосистем демонстрируют низкие концентрации растворённого органического углерода (РОУ) (71,3 и 66,1 мг/л соответственно). Типичный рям отличается наиболее высоким содержанием РОУ (85,8 мг/л) и измеряемых ионов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hydrochemistry</kwd><kwd>ion compound</kwd><kwd>dissolved organic carbon</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гидрохимия</kwd><kwd>ионный состав</kwd><kwd>растворённый органический углерод</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The study was carried out with the financial support of the Russian Science Foundation, project No. 25-27-00272 “Removal of dissolved organic matter and associated microelements from a raised bog, its transformation in the hydrological continuum”.</funding-statement><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке РНФ, проект № 25-27-00272 «Вынос растворенного органического вещества и сопряженных с ним микроэлементов из верхового болота, его трансформация в гидрологическом континууме».</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bourbonniere R.A. 2009. 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