globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.14096
Scopus记录号: 2-s2.0-85044227322
论文题名:
Drought timing and local climate determine the sensitivity of eastern temperate forests to drought
作者: D'Orangeville L.; Maxwell J.; Kneeshaw D.; Pederson N.; Duchesne L.; Logan T.; Houle D.; Arseneault D.; Beier C.M.; Bishop D.A.; Druckenbrod D.; Fraver S.; Girard F.; Halman J.; Hansen C.; Hart J.L.; Hartmann H.; Kaye M.; Leblanc D.; Manzoni S.; Ouimet R.; Rayback S.; Rollinson C.R.; Phillips R.P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2018
卷: 24, 期:6
起始页码: 2339
结束页码: 2351
语种: 英语
英文关键词: climate change ; drought ; evapotranspiration ; forest ecology ; phenology ; temperate forest ; tree-ring
Scopus关键词: climate change ; drought ; environmental conditions ; evapotranspiration ; forest ecosystem ; growth response ; interspecific variation ; intraspecific variation ; phenology ; temperate forest ; tree ring ; North America
英文摘要: Projected changes in temperature and drought regime are likely to reduce carbon (C) storage in forests, thereby amplifying rates of climate change. While such reductions are often presumed to be greatest in semi-arid forests that experience widespread tree mortality, the consequences of drought may also be important in temperate mesic forests of Eastern North America (ENA) if tree growth is significantly curtailed by drought. Investigations of the environmental conditions that determine drought sensitivity are critically needed to accurately predict ecosystem feedbacks to climate change. We matched site factors with the growth responses to drought of 10,753 trees across mesic forests of ENA, representing 24 species and 346 stands, to determine the broad-scale drivers of drought sensitivity for the dominant trees in ENA. Here we show that two factors—the timing of drought, and the atmospheric demand for water (i.e., local potential evapotranspiration; PET)—are stronger drivers of drought sensitivity than soil and stand characteristics. Drought-induced reductions in tree growth were greatest when the droughts occurred during early-season peaks in radial growth, especially for trees growing in the warmest, driest regions (i.e., highest PET). Further, mean species trait values (rooting depth and ψ50) were poor predictors of drought sensitivity, as intraspecific variation in sensitivity was equal to or greater than interspecific variation in 17 of 24 species. From a general circulation model ensemble, we find that future increases in early-season PET may exacerbate these effects, and potentially offset gains in C uptake and storage in ENA owing to other global change factors. © 2018 John Wiley & Sons Ltd
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/110372
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Department of Biology, Indiana University, Bloomington, IN, United States; Centre d’Étude de la Forêt, Université du Québec à Montréal, Montréal, QC, Canada; Department of Geography, Indiana University, Bloomington, IN, United States; Harvard Forest, Harvard University, Petersham, MA, United States; Direction de la Recherche Forestière, Ministère des Forêts, de la Faune et des Parcs du Québec, Québec City, QC, Canada; Ouranos Climate Change Consortium, Montreal, QC, Canada; Department of Biology, Chemistry and Geography, Université du Québec à Rimouski, Rimouski, QC, Canada; Department of Forest and Natural Resources Management, SUNY-ESF, Syracuse, NY, United States; Lamont-Doherty Earth Observatory, Columbia University, Palisades, NY, United States; Geological, Environmental, and Marine Sciences, Rider University, Lawrenceville, NJ, United States; School of Forest Resources, University of Maine, Orono, ME, United States; Department of Geography, Université de Montréal, Montréal, QC, Canada; Vermont Department of Forests, Parks & Recreation, Essex Junction, VT, United States; Rubenstein School of the Environment and Natural Resources, University of Vermont, Burlington, VT, United States; Department of Geography, University of Alabama, Tuscaloosa, AL, United States; Department of Biogeochemical Processes, Max Planck Institute for Biogeochemistry, Jena, Germany; Department of Ecosystem Science and Management, Penn State College of Agricultural Sciences, State College, PA, United States; Department of Biology, Ball State University, Muncie, IN, United States; Stockholm University, Stockholm, Sweden; Department of Geography, University of Vermont, Burlington, VT, United States; The Morton Arboretum, Lisle, IL, United States

Recommended Citation:
D'Orangeville L.,Maxwell J.,Kneeshaw D.,et al. Drought timing and local climate determine the sensitivity of eastern temperate forests to drought[J]. Global Change Biology,2018-01-01,24(6)
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