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- Title
Response of Temperature-limited Forests to Recent Moisture Changes Derived from Tree-ring Stable Carbon Isotopes.
- Authors
Churakova, O. V.; Fonti, M. V.; Siegwolf, R. T. W.; Kirdyanov, A. V.; Knorre, A. A.; Trushkina, T. V.; Myglan, V. S.; Vaganov, E. A.; Saurer, M.
- Abstract
Recent climatic changes significantly affected forest ecosystems in northern Eurasia. Trees growing in Siberia are very sensitive to climate change due to strong temperature limitation of their growth. Our study covers high-latitude (northeastern Yakutia, eastern Taimyr, central Evenkia) and high-altitude (Russian Altai) zones in Eurasia, where tree-ring parameters (tree-ring width, cell-wall thickness, and maximum latewood density) mainly record summer air temperature variations. To reveal the impact of moisture changes (e.g., amount of precipitation, vapor pressure deficit, relative humidity and potential evapotranspiration) on tree growth in Siberian forest ecosystems, we evaluated δ13C in tree-ring cellulose over the past century. We found that at all the study sites mainly June-July precipitation and June-July evapotranspiration affect larch radial growth, while the strongest influence of vapor pressure deficit on the δ13C was observed in northeastern Yakutia. Further increase of vapor pressure deficit and rise of air temperature in the coming decades in Siberian regions will probably lead to drought and related forest mortality even under additional source of water due to permafrost thaw.
- Subjects
EURASIA; SIBERIA (Russia); CARBON isotopes; STABLE isotopes; TREE-rings; MOISTURE; VAPOR pressure; ATMOSPHERIC temperature; HUMIDITY
- Publication
Russian Journal of Ecology, 2021, Vol 52, Issue 5, p368
- ISSN
1067-4136
- Publication type
Article
- DOI
10.1134/S1067413621050052