DOI: 10.1016/j.foreco.2012.12.012
Scopus记录号: 2-s2.0-84872578821
论文题名: Growth and photosynthetic responses following defoliation and bud removal in eucalypts
作者: Barry K.M. ; Pinkard E.A.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 293 起始页码: 9
结束页码: 16
语种: 英语
英文关键词: Biomass
; Chlorophyll
; Defoliation
; Photosynthesis
Scopus关键词: Biomass allocation
; Damage type
; Defoliation
; Diameter increment
; Eucalyptus globulus
; Eucalyptus nitens
; Foliar N
; Foliar nitrogen
; Globulus
; Leaf area
; Leaf damage
; Light interception
; Pest ecology
; Photosynthetic rate
; Photosynthetic response
; Physiological response
; Process-based models
; Productivity model
; Stem biomass
; Stem diameter
; Stem height
; Biomass
; Chlorophyll
; Forestry
; Photosynthesis
; Physiology
; Plants (botany)
; Productivity
; Time series analysis
; Ecology
; biomass
; chlorophyll
; dicotyledon
; growth response
; leaf area
; photosynthesis
; physiological response
; plantation
; temperate environment
; time series
; Eucalyptus
; Eucalyptus globulus
; Eucalyptus nitens
英文摘要: CABALA, a productivity model for temperate plantation eucalypts, accounts for the impact of eucalypt defoliation on growth but does not yet account for differences in damage type. Consideration of both leaf and bud damage may result in a more realistic representation of growth outcomes for sites with different pest ecologies. We tested whether bud, as compared to leaf damage, elicited similar responses in two commercially important eucalypt species. Growth, biomass and physiological responses of young pot-grown plants to artificial removal of approximately 40% of leaf area (L treatment) or both leaves and buds (LB treatment) was assessed over a 4. month period of recovery. We identified that responses to defoliation were similar between the two species (. Eucalyptus globulus and Eucalyptus nitens). Time series analysis highlighted that growth (height and stem diameter) was significantly reduced by defoliation during the study, which was more pronounced following LB treatment than L alone. At the end of the study, leaf area, stem height and diameter increment were not significantly affected by treatment, but total above-ground, stem biomass and foliar N were. This suggests that changes in patterns of biomass allocation occurred to maintain leaf area and capacity for light interception. Increased photosynthetic rate, which occurred for plants of both defoliation treatments but to a greater extent for the LB than L treatment, also contributed to recovery following defoliation. There was no evidence that photosynthetic rate increase was driven by changes in foliar nitrogen or chlorophyll, as there was not a statistically significant and strong relationship between the two factors. These results give us confidence that the process-based models used to predict the impacts of defoliation on productivity (1) can assume similar responses to defoliation for E. globulus and E. nitens and (2) should account for differences in physiological responses to foliage and bud damage. © 2013 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66718
Appears in Collections: 影响、适应和脆弱性
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作者单位: Cooperative Research Centre for Forestry, Private Bag 12, Hobart 7001, Australia; Tasmanian Institute of Agriculture, University of Tasmania, Private Bag 54, Hobart 7001, Australia; CSIRO Ecosystem Sciences and Climate Adaptation Flagship, Private Bag 12, Hobart 7001, Australia
Recommended Citation:
Barry K.M.,Pinkard E.A.. Growth and photosynthetic responses following defoliation and bud removal in eucalypts[J]. Forest Ecology and Management,2013-01-01,293