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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">sergeogr</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Российской академии наук. Серия географическая</journal-title><trans-title-group xml:lang="en"><trans-title>Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2587-5566</issn><issn pub-type="epub">2658-6975</issn><publisher><publisher-name></publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15356/0373-2444-2015-3-129-140</article-id><article-id custom-type="elpub" pub-id-type="custom">sergeogr-267</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>Геоинформационные системы и картографирование</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Geoinformation Systems and Mappings</subject></subj-group></article-categories><title-group><article-title>ПОСТПИРОГЕННАЯ ТРАНСФОРМАЦИЯ ПОЧВ И ЗАПАСОВ ПОЧВЕННОГО УГЛЕРОДА В ПРЕДТУНДРОВЫХ РЕДКОЛЕСЬЯХ КОЛЫМСКОЙ НИЗМЕННОСТИ: КАСКАДНЫЙ ЭФФЕКТ И ОБРАТНЫЕ СВЯЗИ</article-title><trans-title-group xml:lang="en"><trans-title>Post-pirogenic Transformation of Soils and Soil Carbon Stocks in Sub-Tundra Woodlands of Kolyma Lowland: a Cascading Effect and Feedbacks</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мергелов</surname><given-names>Н. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Mergelov</surname><given-names>N. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москва</p></bio><bio xml:lang="en"><p>Moscow</p></bio><email xlink:type="simple">mergelov@igras.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">Институт географии РАН<country>Россия</country></aff><aff xml:lang="en">Institute of Geography, Russian Academy of Sciences<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2015</year></pub-date><pub-date pub-type="epub"><day>27</day><month>07</month><year>2015</year></pub-date><volume>0</volume><issue>3</issue><fpage>129</fpage><lpage>140</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мергелов Н.С., 2015</copyright-statement><copyright-year>2015</copyright-year><copyright-holder xml:lang="ru">Мергелов Н.С.</copyright-holder><copyright-holder xml:lang="en">Mergelov N.S.</copyright-holder><license 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://izvestia.igras.ru/jour/article/view/267">https://izvestia.igras.ru/jour/article/view/267</self-uri><abstract><p>Установлено, что высокое разнообразие плакорных экосистем предтундровых редколесий Нижней Колымы обусловлено частыми пожарами. От силы и давности пожара зависит тип сукцессий, мощность деятельного слоя, степень оглеенности почвенного профиля, интенсивность процессов криогенного массообмена, величина запасов углерода, классификационный статус почв. Постпирогенные трансформации растительности, почв и древесных пород развиваются по каскадному принципу, когда каждое предыдущее изменение генерирует и усиливает последующее изменение. Активно работают механизмы обратных связей. В первые годы после пожара наблюдается ожидаемое снижение запасов углерода органогенных горизонтов (∆ = –3.4 кг С /м2 ), однако на более поздних стадиях возникает постпирогенный эффект избыточного (по отношению к первоначальному) накопления ОВ на минеральной поверхности (∆ = +1.7 кг С/м2 ). Такие последствия пожаров как опускание–поднятие кровли мерзлоты и интенсификация криогенного массообмена в условиях активного накопления органического вещества верхних горизонтов могут приводить к постпирогенному росту пула углерода минеральной толщи (∆ = +2.5 кг С/м2 ). Время, необходимое для восстановления после сильного пожара исходных запасов почвенного Сорг, составляет 60–200 лет.</p></abstract><trans-abstract xml:lang="en"><p>It is found that the high diversity of the upland ecosystems in sub-tundra woodlands of the Lower Kolyma River is caused by frequent fi res. The type of successions, the power of the active layer, the degree of gleization of the soil profi le, the intensity of cryogenic processes of mass transfer, the size of carbon stocks, the classificatory status of soils depends on the strength and duration of the fi re. Post-pirogenic transformation of vegetation, soils and tree species evolve according to the cascade principle, when every previous change generates and enhances subsequent change, i.e. feedback mechanisms are working actively. In the first years after the fire the expected reduction in carbon stocks of organic horizons (–3.4 kilogram of carbon per square meter) is observed, however, in the later stages the post-pirogenic effect of surplus (relative to initial) accumulation of organic matter at mineral surfaces (+1.7 kilogram of carbon per square meter) occurs. Such consequences of fi res as the lowering-lifting of roof permafrost and the intensification of cryogenic mass transfer in conditions of active organic matter accumulation of upper horizons can lead to post-pirogenic increase of the carbon pool of mineral depth (+2.5 kilogram of carbon per square meter). The time required to recover after a severe fire the initial stocks of soil carbon is 60–200 years.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>предтундровые редколесья</kwd><kwd>почвы</kwd><kwd>почвенный углерод</kwd><kwd>деятельный слой</kwd><kwd>лесные пожары</kwd><kwd>экстремальные условия почвообразования</kwd><kwd>пирогенные катастрофы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>sub-tundra woodlands</kwd><kwd>soils</kwd><kwd>soil carbon</kwd><kwd>active layer</kwd><kwd>forest fi res</kwd><kwd>extreme conditions of pedogenesis</kwd><kwd>pyrogenic catastrophes</kwd></kwd-group><funding-group xml:lang="ru"><funding-statement>Президиум РАН, РНФ</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Богданов В.В. Влияние низовых пожаров на органическое вещество почвы в криолитозоне Центральной Эвенкии. 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