DOI: 10.1016/j.foreco.2015.10.042
Scopus记录号: 2-s2.0-84945584904
论文题名: Forest disturbance across the conterminous United States from 1985-2012: The emerging dominance of forest decline
作者: Cohen W.B. ; Yang Z. ; Stehman S.V. ; Schroeder T.A. ; Bell D.M. ; Masek J.G. ; Huang C. ; Meigs G.W.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 360 起始页码: 242
结束页码: 252
语种: 英语
英文关键词: Forest decline
; Forest disturbance estimation
; Landsat time series
; Probability sampling
; Remote sensing
; TimeSync
Scopus关键词: Climate change
; Data visualization
; Harvesting
; Remote sensing
; Time series
; Forest decline
; Forest disturbances
; Landsat time series
; Probability sampling
; TimeSync
; Forestry
; canopy architecture
; disturbance
; forest cover
; forest management
; Landsat
; literature review
; photography
; population decline
; probability
; remote sensing
; spatiotemporal analysis
; time series
; uncertainty analysis
; visualization
; United States
; Hexapoda
英文摘要: Evidence of shifting dominance among major forest disturbance agent classes regionally to globally has been emerging in the literature. For example, climate-related stress and secondary stressors on forests (e.g., insect and disease, fire) have dramatically increased since the turn of the century globally, while harvest rates in the western US and elsewhere have declined. For shifts to be quantified, accurate historical forest disturbance estimates are required as a baseline for examining current trends. We report annual disturbance rates (with uncertainties) in the aggregate and by major change causal agent class for the conterminous US and five geographic subregions between 1985 and 2012. Results are based on human interpretations of Landsat time series from a probability sample of 7200 plots (30. m) distributed throughout the study area. Forest disturbance information was recorded with a Landsat time series visualization and data collection tool that incorporates ancillary high-resolution data. National rates of disturbance varied between 1.5% and 4.5% of forest area per year, with trends being strongly affected by shifting dominance among specific disturbance agent influences at the regional scale. Throughout the time series, national harvest disturbance rates varied between one and two percent, and were largely a function of harvest in the more heavily forested regions of the US (Mountain West, Northeast, and Southeast). During the first part of the time series, national disturbance rates largely reflected trends in harvest disturbance. Beginning in the mid-90s, forest decline-related disturbances associated with diminishing forest health (e.g., physiological stress leading to tree canopy cover loss, increases in tree mortality above background levels), especially in the Mountain West and Lowland West regions of the US, increased dramatically. Consequently, national disturbance rates greatly increased by 2000, and remained high for much of the decade. Decline-related disturbance rates reached as high as 8% per year in the western regions during the early-2000s. Although low compared to harvest and decline, fire disturbance rates also increased in the early- to mid-2000s. We segmented annual decline-related disturbance rates to distinguish between newly impacted areas and areas undergoing gradual but consistent decline over multiple years. We also translated Landsat reflectance change into tree canopy cover change information for greater relevance to ecosystem modelers and forest managers, who can derive better understanding of forest-climate interactions and better adapt management strategies to changing climate regimes. Similar studies could be carried out for other countries where there are sufficient Landsat data and historic temporal snapshots of high-resolution imagery. © 2015 . Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65165
Appears in Collections: 影响、适应和脆弱性
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作者单位: Pacific Northwest Research Station, USDA Forest Service, Corvallis, OR, United States; Department of Forest Ecosystems and Society, Oregon State University, Corvallis, OR, United States; Department of Forest and Natural Resources Management, State University of New York, Syracuse, NY, United States; Rocky Mountain Research Station, USDA Forest Service, Ogden, UT, United States; Biospheric Sciences Laboratory, NASA Goddard Space Flight Center, Greenbelt, MD, United States; Department of Geographical Sciences, University of Maryland, College Park, MD, United States; Rubenstein School of Environment and Natural Resources, University of Vermont, Burlington, VT, United States
Recommended Citation:
Cohen W.B.,Yang Z.,Stehman S.V.,et al. Forest disturbance across the conterminous United States from 1985-2012: The emerging dominance of forest decline[J]. Forest Ecology and Management,2016-01-01,360