globalchange  > 过去全球变化的重建
DOI: 10.1016/j.agrformet.2019.02.038
WOS记录号: WOS:000468709200007
论文题名:
Canopy transpiration of a Larix sibirica and Pinus sylvestris forest in Central Siberia
作者: Urban, Josef1,3; Rubtsov, Alexey, V1; Urban, Anastasiya, V2; Shashkin, Alexander, V2; Benkova, Vera E.2
通讯作者: Urban, Josef
刊名: AGRICULTURAL AND FOREST METEOROLOGY
ISSN: 0168-1923
EISSN: 1873-2240
出版年: 2019
卷: 271, 页码:64-72
语种: 英语
英文关键词: Sap flow ; Penman-Monteith ; Transpiration ; Climate change ; Boreal forest ; Stomatal conductance ; Siberian larch ; Scats pine
WOS关键词: SAP-FLOW ; CLIMATE-CHANGE ; STOMATAL CONDUCTANCE ; WATER ; DROUGHT ; PERMAFROST ; TREES ; VULNERABILITY ; FLUX
WOS学科分类: Agronomy ; Forestry ; Meteorology & Atmospheric Sciences
WOS研究方向: Agriculture ; Forestry ; Meteorology & Atmospheric Sciences
英文摘要:

Russian boreal forests represent the largest forested region on Earth and comprise one-fifth of the world's forest cover. The two most common genera in Siberia are Larix and Pinus, which together cover more than 80% of the region's forested area. One observable ongoing effect of climate warming is that natural populations of Siberian larch are gradually being replaced by Scots pine. The present work focuses on comparing effects of environmental variables on sap flow density in two even-aged stands of Larix sibirica and Pinus sylvestris. While the two study stands were identical in age (49 years) with similar basal areas and leaf area index, they exhibited very different transpiration rates and response mechanisms to environmental signals. Stand water use was higher for larch than it was for pine, even though transpiration for deciduous larch trees occurred over shorter time periods. The cumulative annual transpiration of the larch stand was 284 +/- 4 mm measured over two consecutive growing seasons (2015-2016), while for pine this was 20% lower. Seasonal transpiration accounted for 50% and 40% of the reference evapotranspiration and 91% and 67% of growing season precipitation for larch and pine, respectively. Water stored in soil provided an important source of water for transpiration, observed as roughly 100 mm, which was then replenished from snowmelt the following spring. The greatest difference between two species related to how well they controlled transpiration, notably in the context of high vapor pressure deficit; under these conditions, pine maintained greater control over transpiration than larch. For all soil moisture levels measured, larch transpired more water than pine. Importantly, our results point to potential future effects of global warming, most notably an increasing decline of larch forests, changes in the ratio between latent and sensitive heat fluxes, and significant modifications in ecosystem water availability.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/140374
Appears in Collections:过去全球变化的重建

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作者单位: 1.Siberian Fed Univ, Krasnoyarsk, Russia
2.Sukhachev Inst Forest SB RAS, Krasnoyarsk, Russia
3.Mendel Univ Brno, Fac Forestry & Wood Technol, Zemedelska 3, Brno 61300, Czech Republic

Recommended Citation:
Urban, Josef,Rubtsov, Alexey, V,Urban, Anastasiya, V,et al. Canopy transpiration of a Larix sibirica and Pinus sylvestris forest in Central Siberia[J]. AGRICULTURAL AND FOREST METEOROLOGY,2019-01-01,271:64-72
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