气候变化领域集成服务门户(CCPortal): A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States

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DOI	10.1073/pnas.2007434117
	A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States
	Littlefield C.E.; Dobrowskia S.Z.; Abatzoglouc J.T.; Parksd S.A.; Davise K.T.
发表日期	2020
ISSN	0027-8424
起始页码	29730
结束页码	29737
卷号	117 期号:47
英文摘要	Researchers are increasingly examining patterns and drivers of postfire forest recovery amid growing concern that climate change and intensifying fires will trigger ecosystem transformations. Diminished seed availability and postfire drought have emerged as key constraints on conifer recruitment. However, the spatial and temporal extent to which recurring modes of climatic variability shape patterns of postfire recovery remain largely unexplored. Here, we identify a north-south dipole in annual climatic moisture deficit anomalies across the Interior West of the US and characterize its influence on forest recovery from fire. We use annually resolved establishment models from dendrochronological records to correlate this climatic dipole with short-term postfire juvenile recruitment. We also examine longer-term recovery trajectories using Forest Inventory and Analysis data from 989 burned plots. We show that annual postfire ponderosa pine recruitment probabilities in the northern Rocky Mountains (NR) and the southwestern US (SW) track the strength of the dipole, while declining overall due to increasing aridity. This indicates that divergent recovery trajectories may be triggered concurrently across large spatial scales: favorable conditions in the SW can correspond to drought in the NR that inhibits ponderosa pine establishment, and vice versa. The imprint of this climatic dipole is manifest for years postfire, as evidenced by dampened long-term likelihoods of juvenile ponderosa pine presence in areas that experienced postfire drought. These findings underscore the importance of climatic variability atmultiple spatiotemporal scales in driving cross-regional patterns of forest recovery and have implications for understanding ecosystem transformations and species range dynamics under global change. © 2020 National Academy of Sciences. All rights reserved.
英文关键词	Climate variability; Conifer recovery; Drought; Rocky Mountains; Wildfire
语种	英语
scopus关键词	article; climate change; conifer; dipole; drought; forest; global change; human; juvenile; moisture; nonhuman; ponderosa pine; probability; United States; wildfire
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/160708
作者单位	Littlefield, C.E., Department of Forest Management, College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States, Silviculture and Applied Forest Ecology Lab, Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT 05405, United States; Dobrowskia, S.Z., Silviculture and Applied Forest Ecology Lab, Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT 05405, United States; Abatzoglouc, J.T., Management of Complex Systems, College of Engineering, University of California MercedCA 95343, United States; Parksd, S.A., Aldo Leopold Wilderness Research Institute, Rocky Mountain Research Station, US Department of Agriculture Forest Service, Missoula, MT 59801, United States; Davise, K.T., Department of Ecosystem and Conservation Sciences, College of Forestry and Conservation, University of Montana, Missoula, MT 59812, United States
推荐引用方式 GB/T 7714	Littlefield C.E.,Dobrowskia S.Z.,Abatzoglouc J.T.,et al. A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States[J],2020,117(47).
APA	Littlefield C.E.,Dobrowskia S.Z.,Abatzoglouc J.T.,Parksd S.A.,&Davise K.T..(2020).A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States.Proceedings of the National Academy of Sciences of the United States of America,117(47).
MLA	Littlefield C.E.,et al."A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States".Proceedings of the National Academy of Sciences of the United States of America 117.47(2020).