globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13595
论文题名:
Drought causes reduced growth of trembling aspen in western Canada
作者: Chen L.; Huang J.-G.; Alam S.A.; Zhai L.; Dawson A.; Stadt K.J.; Comeau P.G.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2017
卷: 23, 期:7
起始页码: 2887
结束页码: 2902
语种: 英语
英文关键词: boreal forest ; drought ; radial growth ; spatial variation ; trembling aspen
Scopus关键词: Populus ; Populus tremuloides
英文摘要: Adequate and advance knowledge of the response of forest ecosystems to temperature-induced drought is critical for a comprehensive understanding of the impacts of global climate change on forest ecosystem structure and function. Recent massive decline in aspen-dominated forests and an increased aspen mortality in boreal forests have been associated with global warming, but it is still uncertain whether the decline and mortality are driven by drought. We used a series of ring-width chronologies from 40 trembling aspen (Populus tremuloides Michx.) sites along a latitudinal gradient (from 52° to 58°N) in western Canada, in an attempt to clarify the impacts of drought on aspen growth by using Standardized Precipitation Index (SPI) and Standardized Precipitation Evapotranspiration Index (SPEI). Results indicated that prolonged and large-scale droughts had a strong negative impact on trembling aspen growth. Furthermore, the spatiotemporal variability of drought indices is useful for explaining the spatial heterogeneity in the radial growth of trembling aspen. Due to ongoing global warming and rising temperatures, it is likely that severer droughts with a higher frequency will occur in western Canada. As trembling aspen is sensitive to drought, we suggest that drought indices could be applied to monitor the potential effects of increased drought stress on aspen trees growth, achieve classification of eco-regions and develop effective mitigation strategies to maintain western Canadian boreal forests. © 2017 John Wiley & Sons Ltd
资助项目: This project was funded by the 100 Talents Program of the Chinese Academy of Sciences (CAS) (No. Y421081001). LC thanks the China Scholarship Council (CSC) for supporting his studies in Japan. Other funding agencies include National Natural Science Foundation of China (Grant No. 31570584, 31550110208 & 41661144007), China Postdoctoral Science Foundation (Grant No. 2015M582433), Academy of Finland (Projects No. 1284701, 1282842 & 285630) and ICOS-Finland (Project No. 281255), Natural Science and Engineering Research Council of Canada, Mixedwood Management Association and Forest Resource Improvement Association of Alberta. We thank Caroline Whitehouse for providing information on historical defoliator insect outbreaks in Alberta and Drs. Dan Mandanny and Pie Papadopol from the Canadian Forest Service for providing climate data.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60916
Appears in Collections:影响、适应和脆弱性

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作者单位: Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems, Provincial Key Laboratory of Applied Botany, South China Botanical Garden, Chinese Academy of Sciences, Guangzhou, China; Graduate School of Environmental Science, Hokkaido University, N19W8, Sapporo, Japan; Institut de Recherche Sur Les Forêts, Université du Québec en Abitibi-Témiscamingue, 445, boulevard de l'Université, Rouyn-Noranda, QC, Canada; Department of Physics, University of Helsinki, P.O. Box 48, Helsinki, Finland; Department of Geosciences, University of Arizona, Tucson, AZ, United States; Forest Management Branch, Sustainable Resource Development, 9820, 106 Street, Edmonton, AB, Canada; Department of Renewable Resources, University of Alberta, 116 Street and 85 Avenue, Edmonton, AB, Canada

Recommended Citation:
Chen L.,Huang J.-G.,Alam S.A.,et al. Drought causes reduced growth of trembling aspen in western Canada[J]. Global Change Biology,2017-01-01,23(7)
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