Библиографическое описание:Thawing permafrost can mitigate warming-induced drought stress in boreal forest trees : научное издание / Alexander V. Kirdyanov [et al.]. - Текст : непосредственный // Science of the Total Environment. - 2024. - Т. 912, № . - P. 168858. - ISSN 0048-9697. - ISSN 1879-1026, DOI 10.1016/j.scitotenv.2023.168858.
Аннотация:Perennially frozen soil, also known as permafrost, is important for the functioning and productivity of most of the boreal forest, the world's largest terrestrial biome. A better understanding of complex vegetation-permafrost interrelationships is needed to predict changes in local- to large-scale carbon, nutrient, and water cycle dynamics under future global warming. Here, we analyze tree-ring width and tree-ring stable isotope (C and O) measurements of Gmelin larch (Larix gmelinii (Rupr.) Rupr.) from six permafrost sites in the northern taiga of central Siberia. Our multi-parameter approach shows that changes in tree growth were predominantly controlled by the temperature and moisture content of the active soil and upper permafrost layers. The observed patterns range from strong growth limitations by early summer temperatures at higher elevations to significant growth controls by precipitation at warmer and well-drained lower-elevation sites. Enhanced radial tree growth is mainly found at sites with fast thawing upper mineral soil layers, and the comparison of tree-ring isotopes over five-year periods with different amounts of summer precipitation indicates that trees can prevent drought stress by accessing water from melted snow and seasonally frozen soil. Identifying the active soil and upper permafrost layers as central water resources for boreal tree growth during dry summers demonstrates the complexity of ecosystem responses to climatic changes.
Издательство:Elsevier Science Publishing Company, Inc.
Источник:Science of the Total Environment
Выпуск:Т. 912
Номера страниц:168858
Держатель оригинала документа:Department of Geography, Masaryk University, 61137 Brno, Czech Republic, Department of Geography, University of Cambridge, CB2 3EN, UK, Global Change Research Centre, 61300 Brno, Czech Republic, Kazan Federal University, Institute of Geology and Petroleum Technologies, Kremlyovskaya str. 18, Kazan 420008, Russian Federation, National Park "Krasnoyarsk Stolby", Krasnoyarsk 660006, Russia, Siberian Federal University, 660041 Krasnoyarsk, Svobodnii 79, Russia, Swiss Federal Institute for Forest, Snow and Landscape Research WSL, CH-8903 Birmensdorf, Switzerland, V.N. Sukachev Institute of Forest SB RAS, 660036 Krasnoyarsk, Akademgorodok, Russia
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