Climatic factors controlling Pinus sylvestris radial growth along a transect of increasing continentality in southern Siberia |
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| Affiliation: | 1. Siberian Federal University, 79 Svobodny pr., 660041 Krasnoyarsk, Russia;2. V.N. Sukachev Institute of Forest SB RAS, Federal Research Center ‘Krasnoyarsk Science Center SB RAS‘, Akademgorodok 50/28, Krasnoyarsk 660036, Russia;3. Department of Geography, University of Cambridge, CB2 3EN, UK;1. Dendrology Department, University of Forestry, Sofia, Bulgaria;2. Institute of Geography, Russian Academy of Sciences, Moscow, Russia;1. Institute of Geography, Russian Academy of Sciences, 119017, Staromonetniy Lane, 29, Moscow, Russia;2. National Research University, Higher School of Economics, Faculty of Geography and Geoinformation Technologies, Pokrovsky Boulevard-11, L212, Russia;1. Key Laboratory of Desert and Desertification, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 73000, China;2. University of Chinese Academy of Sciences, Beijing, 10048, China;3. CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China;4. Dongdashan Natural Reserve, Ganzhou District, Zhangye, 734000, China;1. Khakass Technical Institute, Siberian Federal University, 27 Shchetinkina st., 655017 Abakan, Russia;2. Birbal Sahni Institute of Palaeosciences, 53 University Road, 226007 Lucknow, India;3. Siberian Federal University, 79 Svobodny pr., 660041 Krasnoyarsk, Russia;4. Sukachev Institute of Forest, Siberian Branch of the Russian Academy of Science, 50 bil. 28, Akademgorodok, 660036 Krasnoyarsk, Russia;1. Latvian State Forest Research Institute ‘Silava’, 111 Rigas str., Salaspils LV-2169, Latvia;2. University of Latvia, Faculty of Biology, Jelgavas str. 1, Riga LV-1010, Latvia;3. Thünen Institute of Forest Genetics, Eberswalder Chaussee 3a, D-15377 Waldsieversdorf, Germany;4. Swiss Federal Research Institute WSL, Zürcherstrasse 111, Birmensdorf CH-8903, Switzerland;5. Swiss Federal Research Institute WSL Institute for Snow and Avalanche Research SLF, Flüelastrasse 11, 7260 Davos CH-7260, Switzerland;6. Department of Silviculture and Genetics of Forest Trees, Forest Research Institute, Braci Leśnej 3, Raszyn 05-090, Poland |
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| Abstract: | The forest-steppe ecotone in southern Siberia is characterized by a strong dependence of tree growth on summer drought, which is expected to increase under ongoing climate change, with potential consequences for regional and global water and carbon cycles. Since climate conditions control tree secondary growth throughout the growing season, it is assumed that climate change will differently impact the formation of particular tree-ring sectors.In this study, we evaluated spatiotemporal trends in Pinus sylvestris L. tree-ring traits: tree-ring (RW), earlywood (EW) and latewood (LW) widths, as well as their climate response in order to understand potential reactions of P. sylvestris radial growth to climate change along a 4900 km longitudinal transect of increasing continentality in southern Siberia.Results indicated an increasing tree radial growth from the West to the East along the transect. Tree-ring parameters were sensitive to drought, showing a temporal delay in the climatic signals of LW (summer) relative to EW (spring). Climate control of tree growth was stronger at the western site, while it was alleviated over time in eastern sites.This study highlighted the wide plasticity of P. sylvestris to thrive within a wide range of climatic conditions, also suggesting that future drought, as predicted by climate change simulations, will potentially impact P. sylvestris growth differently along the studied gradient, being more susceptible at the western sites due to the current growth limitation. |
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| Keywords: | Drought Earlywood Forest-Steppe Latewood Radial growth SPEI |
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