DOI: 10.1016/j.foreco.2013.09.040
Scopus记录号: 2-s2.0-84888132917
论文题名: Testing allometric equations for prediction of above-ground biomass of mallee eucalypts in southern Australia
作者: Paul K.I. ; Roxburgh S.H. ; Ritson P. ; Brooksbank K. ; England J.R. ; Larmour J.S. ; John Raison R. ; Peck A. ; Wildy D.T. ; Sudmeyer R.A. ; Giles R. ; Carter J. ; Bennett R. ; Mendham D.S. ; Huxtable D. ; Bartle J.R.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2013
卷: 310 起始页码: 1005
结束页码: 1015
语种: 英语
英文关键词: Aboveground
; Allometry
; Eucalyptus kochii
; Eucalyptus loxophleba
; Eucalyptus polybractea
; Generalised equations
Scopus关键词: Aboveground
; Allometry
; Eucalyptus kochii
; Eucalyptus loxophleba
; Eucalyptus polybractea
; Generalised equations
; Biology
; Estimation
; Forecasting
; Rain
; Reforestation
; Trees (mathematics)
; Biomass
; aboveground biomass
; allometry
; canopy architecture
; carbon sequestration
; cost-benefit analysis
; evergreen tree
; prediction
; reforestation
; Australia
; Eucalyptus
; Eucalyptus kochii
; Eucalyptus loxophleba
; Eucalyptus polybractea
英文摘要: In medium-low (250-850mmyear-1) rainfall regions of southern Australia, reforestation with mallee eucalypts is promoted for biomass production for carbon sequestration and/or bioenergy. Cost-effective estimation of biomass is essential for assessing the economic viability of plantings. To explore this, we collated biomass data from 198 stands in southern Australia (N=3384 individual trees, including 1065 trees re-grown as coppice) and developed allometric equations for non-destructive estimation of above-ground biomass based on either stem diameter at 10cm height for uncut trees, or on crown volume index for coppiced trees. Three classes of allometric equations were developed. In order of decreasing specificity, these were; (i) site-and-specie specific, (ii) generic species-specific, and (iii) generic multi-species. Validation at the site level was realised by analysing the bias, precision and overall accuracy of allometry-predicted biomass when tested against directly-measured biomass harvested manually from whole-plots across six contrasting sites. Another 17 plantings were harvested with a mechanical harvester. A finer-scale analysis investigating the performance of these allometric equations at the individual-tree level across all stands was also undertaken. When predicting biomass at the site-level using either of the generalised equations, the percentage error of prediction was <±9%, but could be in the range of ±15% to ±21% at individual sites. Precision, and thus accuracy, increased slightly with the level of specificity of equations. Although allometry was statistically significantly influenced by climate, inclusion of the site-specific factor of average rainfall in generic equations increased efficiency of prediction of above-ground biomass by only 5%. We conclude: (i) site-and-species specific equations are more accurate than generic equations for predictions at the site-level, and (ii) generic equations, particularly species-specific relationships, can be confidently applied to provide regional, or estate-level, estimates of above-ground biomass across a range of mallee eucalypt plantings in the medium-low rainfall regions of southern Australia. © 2013. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/66287
Appears in Collections: 影响、适应和脆弱性
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作者单位: CSIRO, Sustainable Agriculture Flagship and CSIRO Ecosystem Sciences, Australia; GPO Box 1700, Canberra, ACT 2601, Australia; Private Bag 10, Clayton South, VIC 3169, Australia; Private Bag 5, Wembley, WA 6913, Australia; Private Bag 12, Hobart, TAS 7001, Australia; Department of Agriculture and Food, WA, Australia; 3 Baron-Hay Court, South Perth, WA 6151, Australia; 444 Albany Hwy, Albany, WA 6330, Australia; Department of Environment and Conservation - Western Australia, Locked Bag 104, Bentley Delivery Centre, WA 6983, Australia; Fares Rural Pty Ltd., PO Box 526, Wembley, WA 6913, Australia
Recommended Citation:
Paul K.I.,Roxburgh S.H.,Ritson P.,et al. Testing allometric equations for prediction of above-ground biomass of mallee eucalypts in southern Australia[J]. Forest Ecology and Management,2013-01-01,310