DOI: 10.1016/j.foreco.2016.05.010
Scopus记录号: 2-s2.0-84968813514
论文题名: Forest disturbance interactions and successional pathways in the Southern Rocky Mountains
作者: Liang L. ; Hawbaker T.J. ; Zhu Z. ; Li X. ; Gong P.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 375 起始页码: 35
结束页码: 45
语种: 英语
英文关键词: Disturbance
; Fire
; Landsat
; Mountain pine beetle
; Recovery
; Time series
Scopus关键词: Decision trees
; Forestry
; Landforms
; Recovery
; Reforestation
; Time series
; Automated classification
; Dendroctonus ponderosae
; Disturbance
; LANDSAT
; Mountain pine beetle
; Random forest classifier
; Southern rocky mountains
; Temporal segmentations
; Fires
; beetle
; coniferous forest
; ecosystem resilience
; environmental disturbance
; fire
; human activity
; Landsat
; mortality
; seedling establishment
; succession
; time series
; Rocky Mountains
; Coleoptera
; Dendroctonus ponderosae
; Pinus contorta
; Pinus mugo
英文摘要: The pine forests in the southern portion of the Rocky Mountains are a heterogeneous mosaic of disturbance and recovery. The most extensive and intensive stress and mortality are received from human activity, fire, and mountain pine beetles (MPB; Dendroctonus ponderosae). Understanding disturbance interactions and disturbance-succession pathways are crucial for adapting management strategies to mitigate their impacts and anticipate future ecosystem change. Driven by this goal, we assessed the forest disturbance and recovery history in the Southern Rocky Mountains Ecoregion using a 13-year time series of Landsat image stacks. An automated classification workflow that integrates temporal segmentation techniques and a random forest classifier was used to examine disturbance patterns. To enhance efficiency in selecting representative samples at the ecoregion scale, a new sampling strategy that takes advantage of the scene-overlap among adjacent Landsat images was designed. The segment-based assessment revealed that the overall accuracy for all 14 scenes varied from 73.6% to 92.5%, with a mean of 83.1%. A design-based inference indicated the average producer's and user's accuracies for MPB mortality were 85.4% and 82.5% respectively. We found that burn severity was largely unrelated to the severity of pre-fire beetle outbreaks in this region, where the severity of post-fire beetle outbreaks generally decreased in relation to burn severity. Approximately half the clear-cut and burned areas were in various stages of recovery, but the regeneration rate was much slower for MPB-disturbed sites. Pre-fire beetle outbreaks and subsequent fire produced positive compound effects on seedling reestablishment in this ecoregion. Taken together, these results emphasize that although multiple disturbances do play a role in the resilience mechanism of the serotinous lodgepole pine, the overall recovery could be slow due to the vast area of beetle mortality. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64854
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Arkansas Forest Resources Center, University of Arkansas Division of Agriculture, School of Forestry and Natural Resources, University of Arkansas at Monticello, Monticello, AR, United States; Department of Environmental Science, Policy and Management, University of California, Berkeley, CA, United States; U.S. Geological Survey, PO Box 25046; DFC; MS 980, Denver, CO, United States; U.S. Geological Survey, 12201 Sunrise Valley Drive, Reston, VA, United States; Ministry of Education Key Laboratory for Earth System Modeling, Center for Earth System Science, Tsinghua University, Beijing, China
Recommended Citation:
Liang L.,Hawbaker T.J.,Zhu Z.,et al. Forest disturbance interactions and successional pathways in the Southern Rocky Mountains[J]. Forest Ecology and Management,2016-01-01,375