DOI: 10.1016/j.foreco.2013.06.051
Scopus记录号: 2-s2.0-84880958013
论文题名: Do eucalypt plantation management practices create understory reservoirs of scarab beetle pests in the soil?
作者: Frew A. ; Nielsen U.N. ; Riegler M. ; Johnson S.N.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 306 起始页码: 275
结束页码: 280
语种: 英语
英文关键词: Fertilisation
; Grass understory
; Irrigation
; Nematodes
; Root herbivores
Scopus关键词: Entomopathogenic nematode
; Fertilisation
; Grass understory
; Nematodes
; Nitrogen concentrations
; Root herbivores
; Understory communities
; Understory plant communities
; Animals
; Irrigation
; Soil moisture
; Forestry
; beetle
; colonization
; defoliation
; grass
; irrigation system
; management practice
; monocotyledon
; natural enemy
; nematode
; planation
; plant community
; understory
英文摘要: Eucalypt management practices can affect the population dynamics of defoliating insects. To date, research has focused on how these practices alter eucalypt physiology and chemistry, which in turn affect canopy herbivores. Management practices such as irrigation and fertilisation, however, could also shape the understory plant community and potentially improve habitats for grass root-feeding scarab beetle larvae that later can become defoliators as adults. Using a large scale factorial field experiment comprising 2560 Eucalyptus saligna, we investigated the effects of irrigation and fertilisation on the understory ecology of a eucalypt plantation. We specifically focussed on grass communities and populations of scarab beetles and their natural enemies (entomopathogenic nematodes, EPNs). Irrigation and fertilisation increased grass coverage by 40% and 42%, respectively, and affected grass species composition. In particular, fertilisation favoured colonisation with C3 grasses (e.g. Microlaena stipoides) that have higher nitrogen concentrations over lower quality C4 grasses (e.g. Setaria incrassata). Fertilisation increased the nitrogen concentration of grasses by 30% on average. Scarab abundance increased by 52% in fertilised plots, potentially due to higher nutritional quality of host plants and the dominance of nutritionally superior species. Irrigation increased soil water content, but did not promote scarab larvae abundance. The presence of EPNs, however, was 78% higher in irrigated plots, which suggests scarab larvae populations may have been controlled by EPNs. This study illustrates how plantation management practices can affect understory communities of both plants and soil invertebrates with potential for creating 'reservoirs' of scarab beetle pests. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66425
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Hawkesbury Institute for the Environment, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia; School of Science and Health, University of Western Sydney, Locked Bag 1797, Penrith, NSW 2751, Australia
Recommended Citation:
Frew A.,Nielsen U.N.,Riegler M.,et al. Do eucalypt plantation management practices create understory reservoirs of scarab beetle pests in the soil?[J]. Forest Ecology and Management,2013-01-01,306