<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" article-type="research-article" dtd-version="1.2" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">Eurasian Soil Science</journal-id><journal-title-group><journal-title>Eurasian Soil Science</journal-title></journal-title-group><issn publication-format="print">0032-180X</issn><issn publication-format="electronic">3034-5618</issn><publisher><publisher-name>Russian Academy of Science</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31857/S0032180X24040048</article-id><title-group><article-title>Microbiome of Supraglacial Systems on the Aldegonda and Bertel Glaciers (Western Spitsbergen Island)</article-title><trans-title-group xml:lang="ru"><trans-title>Микробиом супрагляциальных систем на ледниках Альдегонда и Бертель (о. Западный Шпицберген)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8533-6536</contrib-id><name-alternatives><name xml:lang="en"><surname>Nikitin</surname><given-names>D. A.</given-names></name><name xml:lang="ru"><surname>Никитин</surname><given-names>Д. А. </given-names></name></name-alternatives><email>dimnik90@mail.ru</email><xref ref-type="aff" rid="aff-1"></xref><xref ref-type="aff" rid="aff-2"></xref></contrib></contrib-group><aff-alternatives id="aff-1"><aff><institution xml:lang="ru">Институт географии РАН</institution><institution xml:lang="en">Institute of Geography, RAS</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff><institution xml:lang="ru"></institution><institution xml:lang="en"></institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2024</year></pub-date><issue>4</issue><fpage>570</fpage><lpage>594</lpage><abstract xml:lang="en"><p>Microbial biomass, diversity of cultivated bacteria and micromycetes, as well as the number of functional nitrogen cycle genes in the supraglacial systems of the Aldegonde and Bertel glaciers were studied. Biomass of microorganisms varied from 2.54 to 722 µg/g of substrate. It has been shown for the first time that the majority (78.7–99.8%) of the microbial biomass of supraglacial objects is represented by fungi rather than prokaryotes. Main part (from 70 to 90%) of the fungal biomass was mycelium, the length of which varied from 6.70 to 537.51 m/g of substrate. The number of prokaryotes varied from 2.4 × 108 to 1.95 × 109 cells/g of substrate. The length of actinomycete mycelium varied from 2.6 to 62.61 m/g of substrate. The abundance of cultivated bacteria and actinomycetes varied from 3.3 × 104 to 1.2 × 106 CFU/g of substrate, and that of micromycetes varied from 2.2 × 101 to 1.7 × 104 CFU/g of substrate. Bacteria of the genera Arthrobacter, Bacillus, Rhodococcus, and Streptomyces, as well as micromycetes of the genera Antarctomyces, Cadophora, Hyphozyma, Teberdinia and Thelebolus dominated. Micromycetes Antarctomyces psychrotrophicus, Hyphozyma variabilis and Teberdinia hygrophila were found in Svalbard for the first time. The number of amoA genes in ammonium-oxidizing bacteria varied from 5.33×106 to 4.86 × 109; nitrogen fixation genes nifH, from 9.89 × 107 to 9.81 × 1010; nirK denitrification genes, from 4.82 × 107 to 3.34 × 1010 gene copies/g of substrate. The results obtained indirectly indicate the leading role of fungi in the microbiome of the supraglacial objects of Svalbard and the significant contribution of prokaryotes to the emission of greenhouse gases from them.</p></abstract><trans-abstract xml:lang="ru"><p>Изучена микробная биомасса, разнообразие культивируемых бактерий и микромицетов, а также численность функциональных генов цикла азота в супрагляциальных системах ледников Альдегонда и Бертель. Биомасса микроорганизмов варьировала от 2.54 до 722 мкг/г субстрата. Впервые показано, что большая часть (78.7–99.8%) микробной биомассы супрагляциальных объектов представлена грибами, а не прокариотами. Основную часть (от 70 до 90%) биомассы грибов составлял мицелий, длина которого изменялась от 6.70 до 537.51 м/г субстрата. Численность прокариот варьировала от 2.4 × 108 до 1.95 × 109 кл./г субстрата. Длина мицелия актиномицетов изменялась от 2.6 до 62.61 м/г субстрата. Численность культивируемых бактерий и актиномицетов варьировала от 3.3 × 104 до 1.2 × 106 КОЕ/г субстрата, а микромицетов – от 2.2 × 101 до 1.7 × 104 КОЕ/г субстрата. Доминировали бактерии родов Arthrobacter, Bacillus, Rhodococcus и Streptomyces, а также микромицеты родов Antarctomyces, Cadophora, Hyphozyma, Teberdinia, Thelebolus. Микромицеты Antarctomyces psychrotrophicus, Hyphozyma variabilis и Teberdinia hygrophila обнаружены на Шпицбергене впервые. Численность генов amoA окисляющих аммоний бактерий варьировала от 5.33 × 106 до 4.86 × 109; генов азотфиксации nifH – от 9.89 × 107 до 9.81 × 1010; генов денитрификации nirK – от 4.82 × 107 до 3.34×1010 копий генов/г субстрата. Полученные результаты косвенно свидетельствуют о ведущей роли грибов в микробиоме супрагляциальных объектов Шпицбергена и значительном вкладе прокариот в эмиссию из них парниковых газов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Высокая Арктика биомасса микроорганизмов численность КОЕ микроскопические грибы бактерии актиномицеты функциональные гены цикла азота</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>Высокая Арктика биомасса микроорганизмов численность КОЕ микроскопические грибы бактерии актиномицеты функциональные гены цикла азота</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Российский научный фонд (20-17-00212).</funding-statement></funding-group><funding-group xml:lang="en"><funding-statement>Russian Science Foundation (20-17-00212).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>B1</label><citation-alternatives><mixed-citation xml:lang="ru">Белкина О.А., Мавлюдов Б.Р. 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