DOI: 10.1016/j.foreco.2016.07.025
Scopus记录号: 2-s2.0-84979207690
论文题名: Pest damage in mixed forests: Disentangling the effects of neighbor identity, host density and host apparency at different spatial scales
作者: Damien M. ; Jactel H. ; Meredieu C. ; Régolini M. ; van Halder I. ; Castagneyrol B.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2016
卷: 378 起始页码: 103
结束页码: 110
语种: 英语
英文关键词: Associational resistance
; Biodiversity
; Insect herbivory
; Pinus pinaster
; Resource dilution
; Thaumetopoea pityocampa
Scopus关键词: Biodiversity
; Density effects
; Fast-growing species
; Insect herbivory
; Pine processionary moth
; Pinus pinaster
; Relative contribution
; Relative growth rate
; Thaumetopoea pityocampa
; Forestry
; biodiversity
; coniferous tree
; growth rate
; herbivory
; host-pathogen interaction
; insect
; mixed forest
; monoculture
; moth
; pest damage
; pest resistance
; population density
; Betula
; Hexapoda
; Pinus pinaster
; Thaumetopoea pityocampa
英文摘要: Mixed forests are thought to be less prone to pest insect damage than monocultures. This may result from reduced host availability (i.e., density effect) or from non-host trees reducing the physical or chemical apparency of host trees (i.e., associational resistance, AR). However, associational and density effects are often confounded in mixed forests. We aimed to disentangle their relative contribution to attacks of pine trees by a specialist pest, the pine processionary moth (PPM, Thaumetopoea pityocampa). We assessed pine infestation by PPM by counting the number of winter nests during three consecutive years along an experimental gradient of pine density in presence or absence of a fast growing species, namely birch. The total number of PPM nests per plot increased with pine density (maximum in high density monocultures), while the proportion of attacked pine trees decreased along the same gradient. Birch provided associational resistance via reduced pine apparency due to their greatest higher. This mechanism occurred at two spatial scales, whenever birch was planted within pine plots or in adjacent plots. Associational resistance was stronger in dense stands, probably due to reduced distance between pines and neighboring birches. But AR faded with time, pines becoming taller than birches, making density effects preeminent over apparency effects. Our findings suggest that mixing tree species to trigger resistance to pest insects requires taking into account the relative growth rate of associated species together with the relative proportion of associated species, both within and between stands. © 2016 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/64754
Appears in Collections: 影响、适应和脆弱性
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作者单位: Univ. Rennes1, UMR CNRS 6553, ECOBIO, Rennes, France; BIOGECO, INRA, Univ. Bordeaux, Cestas, France; Atlantic European Regional Office of the European Forest Institute EFIATLANTIC, Cestas, France
Recommended Citation:
Damien M.,Jactel H.,Meredieu C.,et al. Pest damage in mixed forests: Disentangling the effects of neighbor identity, host density and host apparency at different spatial scales[J]. Forest Ecology and Management,2016-01-01,378