DOI: 10.1016/j.foreco.2015.07.006
Scopus记录号: 2-s2.0-84945485153
论文题名: Fire-mediated interactions between a tree-killing bark beetle and its competitors
作者: Tabacaru C.A. ; McPike S.M. ; Erbilgin N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2015
卷: 356 起始页码: 262
结束页码: 272
语种: 英语
英文关键词: Ambrosia beetles
; Bark beetles
; Competition
; Dendroctonus ponderosae
; Pinus contorta
; Prescribed fire
Scopus关键词: Competition
; Ecology
; Ecosystems
; Fires
; Plants (botany)
; Ambrosia beetles
; Bark beetle
; Dendroctonus ponderosae
; Pinus contorta
; Prescribed fires
; Forestry
; abiotic factor
; beetle
; biotic factor
; colonization
; community structure
; competition (ecology)
; coniferous tree
; environmental disturbance
; forest ecosystem
; long-term change
; predation
; prescribed burning
; Coleoptera
; Dendroctonus ponderosae
; Hexapoda
; Pinus contorta
; Platypodini
; Scolytinae
英文摘要: In forest ecosystems, biotic interactions such as competition or predation may be mediated by abiotic disturbances such as fire. Bark and ambrosia beetles are important biotic factors regulating forest ecosystems, especially tree-killing species that can reach outbreak levels. In a recent study we found that although endemic-level Dendroctonus ponderosae, a tree-killing bark beetle, preferentially colonized fire-injured Pinus contorta (lodgepole pine) after prescribed fire, colonization rates decreased consistently over a 3-year period after an initial pulse. This decline may be due in part to an increase in the abundance of the subcortical community, especially competitors such as other bark beetles and ambrosia beetles. Additionally, while bark and ambrosia beetles can be attracted to fire-injured trees, we do not yet fully understand the temporal progression of the insect community in burned forest stands, and whether other species can outbreak after fire. Thus, our main objective was to characterize the bark and ambrosia beetle community and to examine if a disturbance (fire) can mediate the regulation of a tree-killing bark beetle by intensifying competition. We divided beetles into four groups: lower-, main-, and upper-stem bark beetles, and ambrosia beetles. We found that all groups generally increased in abundance after fire, and we observed a time-lag of approximately 1. year in the overall abundance of all species, wherein beetles increased in burned stands more rapidly than in non-burned stands. All groups were present in burned pine stands 1. year after fire, albeit at varying abundances relative to subsequent years. Finally, we found differences in the bark and ambrosia beetle community between areas with and without D. ponderosae: areas with D. ponderosae contained more bark and ambrosia beetles. Thus, fire likely increases competition, explaining why an initial increase in D. ponderosae colonization did not result in a long-term population increase after prescribed fire. © 2015 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65298
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Renewable Resources, University of Alberta, 4-42 Earth Sciences Building, Edmonton, AB, Canada
Recommended Citation:
Tabacaru C.A.,McPike S.M.,Erbilgin N.. Fire-mediated interactions between a tree-killing bark beetle and its competitors[J]. Forest Ecology and Management,2015-01-01,356