DOI: 10.1016/j.foreco.2014.08.028
Scopus记录号: 2-s2.0-84907557620
论文题名: Are density reduction treatments effective at managing for resistance or resilience to spruce beetle disturbance in the southern Rocky Mountains?
作者: Temperli C. ; Hart S.J. ; Veblen T.T. ; Kulakowski D. ; Hicks J.J. ; Andrus R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 334 起始页码: 53
结束页码: 63
语种: 英语
英文关键词: Colorado Rocky Mountains
; Dendroctonus rufipennis
; Forest management
; Picea engelmannii
; San Juan National Forest
; Stand structure
Scopus关键词: Dendroctonus rufipennis
; National forests
; Picea engelmannii
; Rocky Mountains
; Stand structures
; Forestry
; beetle
; coniferous forest
; ecosystem resilience
; environmental disturbance
; forest ecosystem
; forest management
; forest resource
; pest damage
; regeneration
; stand structure
; Ecosystems
; Forest Management
; Insects
; Mountains
; Picea
; Colorado
; Rocky Mountains
; San Juan National Forest
; United States
; Dendroctonus rufipennis
; Picea engelmannii
英文摘要: While bark beetle disturbance is an inherent component of coniferous forest ecosystems throughout the northern hemisphere, associated tree mortality and ensuing changes in forest composition and structure may conflict with timber, wildlife, water and other resource management objectives. Therefore, host tree density reduction has been suggested as a management option to increase forest stand resistance to beetle infestation, protect remaining trees and maintain forest resources. However, little is known about the effectiveness of such treatments to mitigate spruce beetle (. Dendroctonus rufipennis) infestation or their influence on the stand structural controls of beetle disturbance in subalpine spruce-fir forests in the Rocky Mountains. We addressed this research gap in a retrospective assessment of the impact of density reduction treatments on stand composition and structure and subsequent (ca. 5-20. years later) spruce beetle infestation in southwestern Colorado. The study area was located at the fringe of an ongoing spruce beetle outbreak and at the time of sampling was affected by endemic to incipient beetle pressure. Stand structural attributes and beetle infestation were measured in treated and untreated control stands at four sites. Classification tree analyses revealed spruce diameter and its interaction with spruce basal area percentage as the most important drivers of tree-level beetle infestation. The number, basal area and proportions of beetle-infested spruce were lower in treated stands at sites where treatments significantly reduced the abundance of large spruce trees and where the abundance of large spruce was relatively high prior to tree removal. However, spruce density reduction did not result in a reduction of infestation rates in the remaining large (>25. cm DBH) spruce during the ongoing beetle outbreak. While confirming previous assessments on the limited effectiveness of density reduction treatments for mitigating stand-level beetle infestation, this study provides further insights on the stand structural controls that mediate forest management effects on beetle disturbance dynamics. We conclude by suggesting that priority should be given to management practices that enhance resilience by increasing spruce advance regeneration in the understory as opposed to treatments aimed at achieving resistance to beetle disturbance. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65703
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Geography, University of Colorado, Campus Box 260, Boulder, CO, United States; School of Geography, Clark University, Worcester, MA, United States
Recommended Citation:
Temperli C.,Hart S.J.,Veblen T.T.,et al. Are density reduction treatments effective at managing for resistance or resilience to spruce beetle disturbance in the southern Rocky Mountains?[J]. Forest Ecology and Management,2014-01-01,334