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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">Doklady Biological Sciences</journal-id><journal-title-group><journal-title xml:lang="en">Doklady Biological Sciences</journal-title><trans-title-group xml:lang="ru"><trans-title>Доклады Российской академии наук. Науки о жизни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2686-7389</issn><issn publication-format="electronic">3034-5057</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">693512</article-id><article-id pub-id-type="doi">10.31857/S2686738925040183</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Статьи</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">WOOD POROSITY: UNIVERSAL PARAMETER FOR DENDROCLIMATIC ANALYSIS</article-title><trans-title-group xml:lang="ru"><trans-title><sup>Пористость древесины: универсальный параметр</sup> для дендроклиматического анализа</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khudykh</surname><given-names>T. A.</given-names></name><name xml:lang="ru"><surname>Худых</surname><given-names>Т. А.</given-names></name></name-alternatives><email>khudykta@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Belokopytova</surname><given-names>L. V.</given-names></name><name xml:lang="ru"><surname>Белокопытова</surname><given-names>Л. В.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Babushkina</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Бабушкина</surname><given-names>Е. А.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vaganov</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Ваганов</surname><given-names>Е. А.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Ecology and Geography</institution></aff><aff><institution xml:lang="ru">Институт экологии и географии</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Khakass Technical Institute</institution></aff><aff><institution xml:lang="ru">Хакасский технический институт</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Department of Dendroecology, V. N. Sukachev Institute of Forest</institution></aff><aff><institution xml:lang="ru">Институт леса им. В. Н. Сукачева, ФИЦ КНЦ СО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-08-15" publication-format="electronic"><day>15</day><month>08</month><year>2025</year></pub-date><volume>523</volume><issue>1</issue><issue-title xml:lang="en">VOL 523, NO (2025)</issue-title><issue-title xml:lang="ru">ТОМ 523, № (2025)</issue-title><fpage>485</fpage><lpage>490</lpage><history><date date-type="received" iso-8601-date="2025-10-16"><day>16</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://journals.eco-vector.com/2686-7389/article/view/693512">https://journals.eco-vector.com/2686-7389/article/view/693512</self-uri><abstract xml:lang="en"><p>Annual rings of conifers have traditionally served as a reliable indicator of climatic changes, whereas such analysis methods are poorly developed for diffuse-porous species such as common aspen (Populus tremula L.). In this paper, a new approach, PiC densitometry, based on algorithmic analysis of wood porosity distribution along the annual ring, is proposed. The study was conducted on samples of Scots pine (Pinus sylvestris L.) and aspen. The methodology included measurement of annual ring widths, anatomical analysis of wood microstructure and software image processing to construct porosity profiles. The results revealed fundamental differences in porosity dynamics between species: in pine its value decreases by 70 % from early- to latewood, reflecting a seasonal reduction in water supply, whereas in aspen the change does not exceed 20 %, indicating a stable water demand throughout the season. Dendroclimatic analysis showed that pine radial growth was most sensitive to May-June precipitation, while in aspen, temperatures during the same period were the key factor. The developed PiC densitometry method expands the possibilities of dendrochronological studies, allowing the use of diffuse-porous species for climate reconstruction and assessment of its influence on wood structure.</p></abstract><trans-abstract xml:lang="ru"><p>Годичные кольца хвойных растений традиционно служат надежным индикатором климатических изменений, тогда как для рассеянно-сосудистых видов, таких как осина (Populus tremula L.), подобные методы анализа разработаны слабо. В данной работе предложен новый подход – PiC денситометрия, основанный на алгоритмическом анализе распределения пористости древесины по годичному кольцу. Исследование проводилось на образцах сосны обыкновенной (Pinus sylvestris L.) и осины обыкновенной (Populus tremula). Методика включала измерение ширины годичных колец, анатомический анализ микроструктуры древесины и программную обработку изображений для построения профилей пористости. Результаты выявили принципиальные различия в динамике пористости между видами: у сосны ее значение снижается на 70 % от ранней к поздней древесине, что отражает сезонное сокращение водопроведения, тогда как у осины изменение не превышает 20 %, свидетельствуя о стабильной потребности в воде в течение всего сезона. Дендроклиматический анализ показал, что радиальный прирост сосны наиболее чувствителен к осадкам мая–июня, в то время как у осины ключевым фактором выступают температуры этого же периода. Разработанный метод PiC денситометрия расширяет возможности дендрохронологических исследований, позволяя использовать рассеянно-сосудистые виды для реконструкции климата и оценки его влияния на структуру древесины.</p></trans-abstract><kwd-group xml:lang="en"><kwd>digital wood anatomy</kwd><kwd>densitometry</kwd><kwd>image analysis</kwd><kwd>porosity</kwd><kwd>deciduous</kwd><kwd>coniferous</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>цифровая анатомия древесины</kwd><kwd>денситометрия</kwd><kwd>анализ изображений</kwd><kwd>пористость</kwd><kwd>лиственные</kwd><kwd>хвойные</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа поддержана Российским научным фондом (№ 23-44-00067).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Fritts, H., Tree Rings and Climate, New York: Academic Press, 2012.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Schweingruber, F.H., Microscopic Wood Anatomy: Structural Variability of Stems and Twigs in Recent and Subfossil Woods from Central Europe, Birmensdorf: Swiss Federal Institute for Forest, Snow and Landscape Research, 1990.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Vaganov, E.A., Hughes, M.K., and Shashkin, A.V., Growth Dynamics of Conifer Tree Rings: Images of Past and Future Environments // Ecol. 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