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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0147688
论文题名:	Average Stand Age from Forest Inventory Plots Does Not Describe Historical Fire Regimes in Ponderosa Pine and Mixed-Conifer Forests of Western North America
作者:	Jens T. Stevens; Hugh D. Safford; Malcolm P. North; Jeremy S. Fried; Andrew N. Gray; Peter M. Brown; Christopher R. Dolanc; Solomon Z. Dobrowski; Donald A. Falk; Calvin A. Farris; Jerry F. Franklin; Peter Z. Fulé; R. Keala Hagmann; Eric E. Knapp; Jay D. Miller; Douglas F. Smith; Thomas W. Swetnam; Alan H. Taylor
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2016
发表日期:	2016-5-19
卷:	11, 期:5
语种:	英语
英文关键词:	Trees ; Wildfires ; Forests ; Fire suppression technology ; Pines ; Fire engineering ; Fuels ; Rocky Mountains
英文摘要:	Quantifying historical fire regimes provides important information for managing contemporary forests. Historical fire frequency and severity can be estimated using several methods; each method has strengths and weaknesses and presents challenges for interpretation and verification. Recent efforts to quantify the timing of historical high-severity fire events in forests of western North America have assumed that the “stand age” variable from the US Forest Service Forest Inventory and Analysis (FIA) program reflects the timing of historical high-severity (i.e. stand-replacing) fire in ponderosa pine and mixed-conifer forests. To test this assumption, we re-analyze the dataset used in a previous analysis, and compare information from fire history records with information from co-located FIA plots. We demonstrate that 1) the FIA stand age variable does not reflect the large range of individual tree ages in the FIA plots: older trees comprised more than 10% of pre-stand age basal area in 58% of plots analyzed and more than 30% of pre-stand age basal area in 32% of plots, and 2) recruitment events are not necessarily related to high-severity fire occurrence. Because the FIA stand age variable is estimated from a sample of tree ages within the tree size class containing a plurality of canopy trees in the plot, it does not necessarily include the oldest trees, especially in uneven-aged stands. Thus, the FIA stand age variable does not indicate whether the trees in the predominant size class established in response to severe fire, or established during the absence of fire. FIA stand age was not designed to measure the time since a stand-replacing disturbance. Quantification of historical “mixed-severity” fire regimes must be explicit about the spatial scale of high-severity fire effects, which is not possible using FIA stand age data.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0147688&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/23202
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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作者单位:

John Muir Institute of the Environment, University of California, Davis, CA, 95616, United States of America;USDA Forest Service, Pacific Southwest Region, Vallejo, CA, 94592, United States of America;Department of Environmental Science and Policy, University of California, Davis, CA, 95616, United States of America;John Muir Institute of the Environment, University of California, Davis, CA, 95616, United States of America;USDA Forest Service, Pacific Southwest Research Station, Davis, CA, 95616, United States of America;USDA Forest Service, Forest Inventory and Analysis Program, Pacific Northwest Research Station, Portland, OR, 97205, United States of America;USDA Forest Service, Forest Inventory and Analysis Program, Pacific Northwest Research Station, Corvallis, OR, 97331, United States of America;Rocky Mountain Tree-Ring Research, Fort Collins, CO, 80526, United States of America;Biology Department, Mercyhurst University, Erie, PA, 16546, United States of America;Dept. Forest Management, University of Montana, Missoula, MT, 59812, United States of America;School of Natural Resources and the Environment, University of Arizona, Tucson, AZ, 85721, United States of America;Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, 85721, United States of America;National Park Service, Pacific West Region, Fire and Aviation Management, Klamath Falls, OR, 97601, United States of America;School of Environmental and Forest Sciences, University of Washington, Seattle, WA, 98195, United States of America;School of Forestry, Northern Arizona University, Flagstaff, AZ, 86011, United States of America;School of Environmental and Forest Sciences, University of Washington, Seattle, WA, 98195, United States of America;USDA Forest Service, Pacific Southwest Research Station, Redding, CA, 96002, United States of America;USDA Forest Service, Pacific Southwest Region, Fire and Aviation Management, McClellan, CA, 95652, United States of America;Yosemite National Park, Yosemite, CA, 95389, United States of America;Laboratory of Tree-Ring Research, University of Arizona, Tucson, AZ, 85721, United States of America;Department of Geography and Earth and Environmental Systems Institute, The Pennsylvania State University, University Park, PA, 16802, United States of America

Recommended Citation:

Jens T. Stevens,Hugh D. Safford,Malcolm P. North,et al. Average Stand Age from Forest Inventory Plots Does Not Describe Historical Fire Regimes in Ponderosa Pine and Mixed-Conifer Forests of Western North America[J]. PLOS ONE,2016-01-01,11(5)

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