DOI: 10.1016/j.foreco.2014.08.009
Scopus记录号: 2-s2.0-84906739456
论文题名: Exploiting fugitive resources: How long-lived is "fugitive"? Fallen trees are a long-lasting reward for Ips typographus (Coleoptera, Curculionidae, Scolytinae)
作者: Louis M. ; Grégoire J.-C. ; Pélisson P.-F.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 331 起始页码: 129
结束页码: 134
语种: 英语
英文关键词: Bark beetle ecology
; Endemic populations
; Ephemeral resources
; Ips typographus
; Population dynamics
Scopus关键词: Population dynamics
; Population statistics
; Bark beetle
; Endemic populations
; Ephemeral resources
; Inter-specific competitions
; Ips typographus
; Nutritional qualities
; Population densities
; Population maintenances
; Curculionidae
; Fallen tree
; Long lasting
; Scolytinae
; Forestry
; Population dynamics
; beetle
; nutritional requirement
; pest species
; population density
; population growth
; seasonal variation
; tree
; body mass
; epidemic
; longevity
; nutrition
; phloem
; plant-herbivore interaction
; population dynamics
; population outbreak
; Bark
; Ecology
; Forestry
; Insects
; Eurasia
; Coleoptera
; Curculionidae
; Ips typographus
; Scolytinae
英文摘要: Because of their significant impact on forests, tree-killing bark beetles have been widely studied at epidemic population densities. However, bark-beetle outbreaks emerge from populations at low, endemic levels, where population maintenance and growth depend on scarce, ephemeral resources such as lightning-struck trees, weakened and suppressed standing trees or wind-felled trees, depending on the species. The longevity of these resources strongly influences population dynamics, but very little is known in this respect.We tested the hypothesis that the driving factor reducing the availability of fallen trees is the decrease of their nutritional quality. We analysed the qualitative changes of the phloem of spruces artificially uprooted at different times (2-17. month before the experiment started) and simultaneously exposed during the same flight season to attacks of the major forest pest in Eurasia, Ips typographus. We also measured the impact of resources' decay on the insects' fecundity and the quality of their offspring.Our results show a surprisingly slow decrease of phloem quality over time. The beetles could develop on the oldest (17. month-old) resources with no significant differences in terms of fecundity, progeny body mass and global energy acquisition.Although they retain their nutritional quality over long periods, transient resources are exposed to other factors that make them rapidly unsuitable for I. typographus. We suggest that interspecific competition is probably the most influential of them, and acts as a major driver in the beetles' race for new resources. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65733
Appears in Collections: 影响、适应和脆弱性
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作者单位: Biological Control and Spatial Ecology Laboratory (LUBIES), Université Libre de Bruxelles, CP 160/12, Av. FD Roosevelt 50, 1050 Brussels, Belgium; Université de Lyon, F-69000, Lyon, France; CNRS UMR 5558, Laboratoire de Biométrie et Biologie Evolutive, Université Lyon 1, 69622 Villeurbanne, France
Recommended Citation:
Louis M.,Grégoire J.-C.,Pélisson P.-F.. Exploiting fugitive resources: How long-lived is "fugitive"? Fallen trees are a long-lasting reward for Ips typographus (Coleoptera, Curculionidae, Scolytinae)[J]. Forest Ecology and Management,2014-01-01,331