globalchange  > 气候变化与战略
DOI: 10.1073/pnas.2007434117
论文题名:
A climatic dipole drives short- And long-term patterns of postfire forest recovery in the western United States
作者: Littlefield C.E.; Dobrowskia S.Z.; Abatzoglouc J.T.; Parksd S.A.; Davise K.T.
刊名: Proceedings of the National Academy of Sciences of the United States of America
ISSN: 0027-8424
出版年: 2020
卷: 117, 期:47
起始页码: 29730
结束页码: 29737
语种: 英语
英文关键词: Climate variability ; Conifer recovery ; Drought ; Rocky Mountains ; Wildfire
Scopus关键词: article ; climate change ; conifer ; dipole ; drought ; forest ; global change ; human ; juvenile ; moisture ; nonhuman ; ponderosa pine ; probability ; United States ; wildfire
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.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/163925
Appears in Collections:气候变化与战略

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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

Recommended Citation:
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]. Proceedings of the National Academy of Sciences of the United States of America,2020-01-01,117(47)
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