DOI: 10.1016/j.foreco.2014.05.028
Scopus记录号: 2-s2.0-84902458746
论文题名: Evaluating long-term effects of prescribed fire regimes on carbon stocks in a temperate eucalypt forest
作者: Bennett L.T. ; Aponte C. ; Baker T.G. ; Tolhurst K.G.
刊名: Forest Ecology and Management
ISSN: 0378-1127
出版年: 2014
卷: 328 起始页码: 219
结束页码: 228
语种: 英语
英文关键词: Eucalypt forest
; Fire frequency
; Fire season
; Forest carbon stocks
; Planned burning
; Prescribed fire
Scopus关键词: Deforestation
; Lakes
; Mathematical models
; Rain
; Regression analysis
; Eucalypt forest
; Explanatory variables
; Fire frequencies
; Forest carbons
; Linear multiple regression model
; Management practices
; Prescribed fires
; South-eastern Australia
; Fires
; carbon sequestration
; evergreen forest
; fire behavior
; forest fire
; forest management
; long-term change
; prescribed burning
; seasonality
; temperate forest
; Australia
; Carbon
; Deforestation
; Eucalyptus
; Forest Fires
; Lakes
; Prescribed Burning
; Australia
英文摘要: Prescribed fires are a common management practice in the temperate forests of Australia, but effects on total forest carbon (C) of long-term prescribed fire regimes, involving multiple repeat fires, remain under-examined. This study quantified C stocks in multiple pools after 27. years of a long-term prescribed fire experiment in a mixed-species eucalypt forest in south-eastern Australia. The experimental design included five replications of each of five treatments - a long-unburnt Control, plus a factorial combination of two fire frequencies (c. 3-yearly 'High', c. 10-yearly 'Low'), and two fire seasons (Spring, Autumn) - encompassing up to 7 low-intensity repeat fires over the 27. years.Overall, total C stocks (the sum of all pools: Above-ground biomass, Dead wood, Litter, and Soil) were significantly greater in Control than Fire treatments. Mean total C stock differences (Control minus Fire) were 36Mgha-1, and increased with both fire frequency (46Mgha-1, Control versus High frequency treatments) and fires in autumn rather than spring (42Mgha-1, Control versus Autumn treatments). Mean differences had wide 95% confidence intervals (e.g. 4-67MgCha-1, Control versus Fire), indicating considerable uncertainty about the magnitude of effects of prescribed fire regimes on total C in these native forests. Weighted averaging of linear multiple regression models was used to identify the most important variables for explaining proportional C stock differences ((Control-Fire)/Control), and involved consideration of 85 explanatory variables including measures of fire intensity, fire severity, fuel, pre- and post-fire rainfall, fire weather, and topography. The best regression model explained 80% of variation in total C stock differences between Control and Fire treatments. Consistently important explanatory variables were those representing or associated with fire intensity (flame angle, wind speed, Forest Fire Danger Index), and number of prescribed fires. Measures of fuel load, pre- and post-fire rainfall, and, in particular, fire severity, were less important explanatory variables. The study provides indications of management options for minimising C stock decreases associated with prescribed fire regimes in temperate eucalypt forests; notably, wide fire intervals (closer to 10 than 3years), and utilising strategies to minimise mean fire intensity, including burning in moist (spring) rather than dry (autumn) conditions. © 2014 Elsevier B.V. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/65861
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Forest and Ecosystem Science, The University of Melbourne, 4 Water Street, Creswick, VIC 3363, Australia; Department of Forest and Ecosystem Science, The University of Melbourne, 500 Yarra Boulevard, Richmond, VIC 3121, Australia; Agriculture Research Division, Department of Environment and Primary Industries, Ernest Jones Drive, Macleod, VIC 3085, Australia
Recommended Citation:
Bennett L.T.,Aponte C.,Baker T.G.,et al. Evaluating long-term effects of prescribed fire regimes on carbon stocks in a temperate eucalypt forest[J]. Forest Ecology and Management,2014-01-01,328