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Thawing permafrostcan mitigatewarming-induceddrought stress inboreal forest trees Alexander V. KirdyanovMatthias SaurerAlberto Arzac2023 год

Thawing permafrost can mitigate warming-induced drought stress in boreal forest trees
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Полный текстСтраница публикацииПубликация в OpenAlex
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.
Год издания: 2023
Авторы: Alexander V. Kirdyanov, Matthias Saurer, Alberto Arzac, Anastasia Knorre, Anatoly Prokushkin, Olga V. Churakova, Tito Arosio, Tatiana Bebchuk, Rolf Siegwolf, Ulf Büntgen
Издательство: Elsevier BV
Источник: The Science of The Total Environment
Ключевые слова: Tree-ring climate responses, Climate change and permafrost, Plant Water Relations and Carbon Dynamics
Другие ссылки: The Science of The Total Environment (HTML)
DORA WSL (Swiss Federal Institute for Forest, Snow and Landscape Research) (PDF)
DORA WSL (Swiss Federal Institute for Forest, Snow and Landscape Research) (HTML)
Apollo (University of Cambridge) (PDF)
Apollo (University of Cambridge) (HTML)
PubMed (HTML)