气候变化领域集成服务门户(CCPortal): Widespread increase of tree mortality rates in the Western United States

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DOI	10.1126/science.1165000
	Widespread increase of tree mortality rates in the Western United States
	Van Mantgem P.J.; Stephenson N.L.; Byrne J.C.; Daniels L.D.; Franklin J.F.; Fulé P.Z.; Harmon M.E.; Larson A.J.; Smith J.M.; Taylor A.H.; Veblen T.T.
发表日期	2009
ISSN	0036-8075
起始页码	521
结束页码	524
卷号	323 期号:5913
英文摘要	Persistent changes in tree mortality rates can alter forest structure, composition, and ecosystem services such as carbon sequestration. Our analyses of longitudinal data from unmanaged old forests in the western United States showed that background (noncatastrophic) mortality rates have increased rapidly in recent decades, with doubling periods ranging from 17 to 29 years among regions. Increases were also pervasive across elevations, tree sizes, dominant genera, and past fire histories. Forest density and basal area declined slightly, which suggests that increasing mortality was not caused by endogenous increases in competition. Because mortality increased in small trees, the overall increase in mortality rates cannot be attributed solely to aging of large trees. Regional warming and consequent increases in water deficits are likely contributors to the increases in tree mortality rates.
英文关键词	carbon; water; carbon sequestration; community composition; competition (ecology); ecosystem service; fire history; forest ecosystem; mortality; tree; article; carbon sequestration; climate change; dominant gene; ecosystem; environmental factor; fire; forest; forest dynamics; forest structure; geographic distribution; greenhouse effect; nonhuman; plant environment interaction; plant morphology; priority journal; species dominance; tree; United States; water deficit; Abies; Climate; Coniferophyta; Ecosystem; Fires; Models, Statistical; Nonlinear Dynamics; Northwestern United States; Pinus; Temperature; Trees; Tsuga; United States; North America; United States
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/245832
作者单位	U.S. Geological Survey, Western Ecological Research Center, Three Rivers, CA 93271, United States; USDA Forest Service, Rocky Mountain Research Station, Moscow, ID 83843, United States; Department of Geography, University of British Columbia, Vancouver, BC V6T IZ2, Canada; College of Forest Resources, University of Washington, Seattle, WA 98195, United States; School of Forestry and Ecological Restoration Institute, Northern Arizona University, Flagstaff, AZ 86011, United States; Department of Forest Science, Oregon State University, Corvallis, OR 97331, United States; Department of Geography, University of Colorado, Boulder, CO 80309, United States; Department of Geography, Pennsylvania State University, University Park, PA 16802, United States; U.S. Geological Survey, Western Ecological Research Center, Arcata, CA 95521, United States
推荐引用方式 GB/T 7714	Van Mantgem P.J.,Stephenson N.L.,Byrne J.C.,et al. Widespread increase of tree mortality rates in the Western United States[J],2009,323(5913).
APA	Van Mantgem P.J..,Stephenson N.L..,Byrne J.C..,Daniels L.D..,Franklin J.F..,...&Veblen T.T..(2009).Widespread increase of tree mortality rates in the Western United States.Science,323(5913).
MLA	Van Mantgem P.J.,et al."Widespread increase of tree mortality rates in the Western United States".Science 323.5913(2009).