DOI: 10.1016/j.foreco.2014.09.011
Scopus记录号: 2-s2.0-84949116693
论文题名: Dynamics of spruce bark beetle infestation spots: Importance of local population size and landscape characteristics after a storm disturbance
作者: Kärvemo S. ; Rogell B. ; Schroeder M.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 334 起始页码: 232
结束页码: 240
语种: 英语
英文关键词: Host tree depletion
; Insect outbreak
; Ips typographus
; Local population
; Picea abies
; Tree mortality
Scopus关键词: Plants (botany)
; Population statistics
; Storms
; Host trees
; Insect outbreaks
; Ips typographus
; Local populations
; Picea abies
; Tree mortality
; Forestry
; beetle
; breeding site
; coniferous tree
; host plant
; infectivity
; landscape change
; model validation
; mortality
; pest control
; population outbreak
; population size
; reproductive success
; storm
; Biological Populations
; Picea Abies
; Trees
; Coleoptera
; Hexapoda
; Ips typographus
; Picea
; Picea abies
; Scolytinae
英文摘要: The European spruce bark beetle Ips typographus (L.) is one of the most important pests of mature Norway spruce in Europe. Outbreaks are often triggered by large-scale storm disturbances, which provide the beetles with a large surplus of suitable breeding material in the form of wind-felled spruces in storm gaps. Due to high reproductive success in storm-felled trees beetle populations may become large enough to overcome defences of living trees in the summers following a storm. From a management perspective, procedures enabling reliable predictions of local tree mortality based on the size of storm gaps would be highly valuable. Thus, in the presented study we recorded tree mortality caused by I. typographus during a five-year period around 35 storm gaps hosting local beetle populations, differing in size with 0-818 colonised wind-felled spruces. We then developed models to address the following questions. How does local population size in wind-felled trees influence tree mortality in the subsequent years? What other storm gap and landscape variables influence tree mortality? How does the tree mortality compare with results of earlier studies? Four gap variables and three landscape variables at four scales (500-2000. m) were included in the models. In total, 21,486 standing spruces were killed by I. typographus around the gaps. Tree mortality started in the second summer after the storm and peaked in the third year around most gaps. The models explained most of the variation in tree mortality around the gaps during the five-year period, accounting for 60-67% of the deviance from null models. The most important variable influencing tree mortality was the number of colonised wind-felled trees (a proxy for the size of local populations), explaining 60-64% of the null deviance. Other gap variables that significantly, and positively, affected tree mortality were the mean diameter of colonised wind-felled trees and basal area of living spruce trees in stands adjacent to the storm gaps. Of the landscape variables, the area of storm gaps in the surrounding landscape explained most of the variation in the models. The area of spruce forest also had a significant positive effect at the largest scales. The finding that the number of colonised wind-felled trees was closely related to the number of killed trees in the forest around the gaps implies that areas with numerous large storm gaps should be harvested first after large-scale storm disturbances. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65691
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Ecology, Swedish University of Agricultural Sciences, Box 7044, Uppsala, Sweden; Evolutionary Biology Centre, Uppsala University, Norbyvägen 18D, Uppsala, Sweden
Recommended Citation:
Kärvemo S.,Rogell B.,Schroeder M.. Dynamics of spruce bark beetle infestation spots: Importance of local population size and landscape characteristics after a storm disturbance[J]. Forest Ecology and Management,2014-01-01,334