DOI: 10.1016/j.foreco.2014.11.030
Scopus记录号: 2-s2.0-84930214097
论文题名: Spatiotemporal dynamics of recent mountain pine beetle and western spruce budworm outbreaks across the Pacific Northwest Region, USA
作者: Meigs G.W. ; Kennedy R.E. ; Gray A.N. ; Gregory M.J.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 339 起始页码: 71
结束页码: 86
语种: 英语
英文关键词: Bark beetle
; Change detection
; Defoliator
; Forest disturbance
; Landsat time series
; Tree mortality
Scopus关键词: Maps
; Multi agent systems
; Surveys
; Time series
; Bark beetle
; Change detection
; Defoliator
; Forest disturbances
; Landsat time series
; Tree mortality
; Forestry
; accuracy assessment
; aerial survey
; beetle
; bioactivity
; coniferous forest
; defoliation
; ecoregion
; ecosystem management
; epidemiology
; forest health
; forest inventory
; forest management
; Landsat
; map
; mortality
; pest outbreak
; spatiotemporal analysis
; Forest Management
; Insects
; Inventory Control
; Mortality
; Sustainable Forest Management
; Time Series Analysis
; Oregon
; Pacific Northwest
; United States
; Washington [United States]
; Choristoneura
; Choristoneura occidentalis
; Coleoptera
; Coniferophyta
; Dendroctonus ponderosae
; Hexapoda
; Pinus mugo
; Scolytinae
英文摘要: Across the western US, the two most prevalent native forest insect pests are mountain pine beetle (MPB; Dendroctonus ponderosae; a bark beetle) and western spruce budworm (WSB; Choristoneura freemani; a defoliator). MPB outbreaks have received more forest management attention than WSB outbreaks, but studies to date have not compared their cumulative mortality impacts in an integrated, regional framework. The objectives of this study are to: (1) map tree mortality associated with MPB and WSB outbreaks by integrating forest health aerial detection surveys (ADS; 1970-2012), Landsat time series (1984-2012), and multi-date forest inventory data; (2) compare the timing, extent, and cumulative impacts of recent MPB and WSB outbreaks across forested ecoregions of the US Pacific Northwest Region (PNW; Oregon and Washington). Our Landsat-based insect atlas facilitates comparisons across space, time, and insect agents that have not been possible to date, complementing existing ADS maps in three important ways. The new maps (1) capture variation of insect impacts within ADS polygons at a finer spatial resolution (30. m), substantially reducing estimated insect extent; (2) provide consistent estimates of change for multiple agents, particularly long-duration changes; (3) quantify change in terms of field-measured tree mortality (dead basal area). Despite high variation across the study region, spatiotemporal patterns are evident in both the aerial survey- and Landsat-based maps of insect activity. MPB outbreaks occurred in two phases - first during the 1970s and 1980s in eastern and central Oregon and then more synchronously during the 2000s throughout dry interior conifer forests of the PNW. Reflecting differences in habitat susceptibility and epidemiology, WSB outbreaks exhibited early activity in northern Washington and an apparent spread from the eastern to central PNW during the 1980s, returning to northern Washington during the 1990s and 2000s. At ecoregional and regional scales, WSB outbreaks have exceeded MPB outbreaks in extent as well as total tree mortality, suggesting that ongoing studies should account for both bark beetles and defoliators. Given projected increases of insect and fire activity in western forests, the accurate assessment and monitoring of these disturbances will be crucial for sustainable ecosystem management. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65564
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest Ecosystems and Society, Oregon State University, 321 Richardson Hall, Corvallis, OR, United States; Department of Earth and Environment, Boston University, 675 Commonwealth Avenue, Boston, MA, United States; Pacific Northwest Research Station, USDA Forest Service, 3200 SW Jefferson Way, Corvallis, OR, United States
Recommended Citation:
Meigs G.W.,Kennedy R.E.,Gray A.N.,et al. Spatiotemporal dynamics of recent mountain pine beetle and western spruce budworm outbreaks across the Pacific Northwest Region, USA[J]. Forest Ecology and Management,2015-01-01,339