DOI: 10.1016/j.foreco.2013.04.017
Scopus记录号: 2-s2.0-84877806630
论文题名: The relationship between the emerald ash borer (Agrilus planipennis) and ash (Fraxinus spp.) tree decline: Using visual canopy condition assessments and leaf isotope measurements to assess pest damage
作者: Flower C.E. ; Knight K.S. ; Rebbeck J. ; Gonzalez-Meler M.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 303 起始页码: 143
结束页码: 147
语种: 英语
英文关键词: Canopy condition
; Carbon
; Emerald ash borer
; Fraxinus
; Stable isotope
; Water stress
Scopus关键词: Canopy conditions
; Emerald ash borer
; Fraxinus
; Stable isotopes
; Water stress
; Carbon
; Feeding
; Isotopes
; Rating
; Serpentine
; Tissue
; Forestry
; beetle
; canopy
; carbon isotope
; deciduous tree
; dieback
; invasive species
; larva
; leaf
; life cycle
; management practice
; mortality
; parasite infestation
; pest damage
; pest outbreak
; pest species
; phloem
; population decline
; stable isotope
; visual analysis
; water stress
; Carbon
; Feeding
; Forest Canopy
; Forestry
; Fraxinus
; Isotopes
; Serpentine Papers
; Tissue
; Asia
; North America
英文摘要: Ash trees (Fraxinus spp.) in North America are being severely impacted by the invasive emerald ash borer (Agrilus planipennis Fairmaire) which was inadvertently introduced to the US in the 1990s from Asia. The emerald ash borer (EAB) is a phloem boring beetle which relies exclusively on ash trees to complete its life cycle. Larvae feed in the cambial tissue forming serpentine galleries that may girdle the tree, causing mortality in as little as two years. Although larval feeding is thought to be the cause of rapid tree mortality, the relationship between tree-level water stress and EAB larval activity has never been quantified. Identifying symptoms of an emerald ash borer outbreak at an early stage can facilitate informed management decisions. Although a user-friendly system of ash canopy condition rating has been used extensively to study EAB impacts, the mechanistic relationship between canopy ratings and EAB larval activity has not been quantified.The objective of this research was to use the stable carbon isotopic composition of canopy leaf tissue (foliar δ13C, a proxy of tree level water stress) to quantify the mechanism by which EAB causes tree mortality and to relate this mechanism to the ash canopy condition rating system. We found that as the canopy condition was rated as less healthy, EAB density and gallery cover increased, and foliar δ13C became more enriched as well. The rating system was able to identify trees in early stages of EAB infestation with relatively low levels of EAB (<20% gallery cover or<40EAB/m2). We also found that foliar δ13C and EAB larval gallery cover exhibited a significant positive correlation. These results suggest that as EAB larval feeding occurs, the tree canopy exhibits thinning, and as feeding continues the tree experiences chronic water stress and canopy dieback occurs. This study highlights the usefulness of the ash canopy condition rating system as a proxy of emerald ash borer densities at the tree level. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66527
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological Sciences (m/c 066), University of Illinois at Chicago, 845 West Taylor Street, Chicag, IL 60607, United States; USDA Forest Service, Northern Research Station, 359 Main Rd, Delaware, OH 43015, United States
Recommended Citation:
Flower C.E.,Knight K.S.,Rebbeck J.,et al. The relationship between the emerald ash borer (Agrilus planipennis) and ash (Fraxinus spp.) tree decline: Using visual canopy condition assessments and leaf isotope measurements to assess pest damage[J]. Forest Ecology and Management,2013-01-01,303