DOI: 10.1111/gcb.14460
Scopus记录号: 2-s2.0-85056122502
论文题名: Biomass consumption by surface fires across Earth's most fire prone continent
作者: Murphy B.P. ; Prior L.D. ; Cochrane M.A. ; Williamson G.J. ; Bowman D.M.J.S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2019
卷: 25, 期: 1 起始页码: 254
结束页码: 268
语种: 英语
英文关键词: carbon
; fire frequency
; fire regimes
; fire severity
; net primary productivity
; tropical savanna
; wildfire
Scopus关键词: biomass
; carbon cycle
; combustion
; emission inventory
; fire behavior
; fire management
; global perspective
; greenhouse gas
; net primary production
; savanna
; Australia
; Australia
; biomass
; carbon cycle
; climate
; ecosystem
; fire
; Australia
; Biomass
; Carbon Cycle
; Climate
; Ecosystem
; Fires
英文摘要: Landscape fire is a key but poorly understood component of the global carbon cycle. Predicting biomass consumption by fire at large spatial scales is essential to understanding carbon dynamics and hence how fire management can reduce greenhouse gas emissions and increase ecosystem carbon storage. An Australia-wide field-based survey (at 113 locations) across large-scale macroecological gradients (climate, productivity and fire regimes) enabled estimation of how biomass combustion by surface fire directly affects continental-scale carbon budgets. In terms of biomass consumption, we found clear trade-offs between the frequency and severity of surface fires. In temperate southern Australia, characterised by less frequent and more severe fires, biomass consumed per fire was typically very high. In contrast, surface fires in the tropical savannas of northern Australia were very frequent but less severe, with much lower consumption of biomass per fire (about a quarter of that in the far south). When biomass consumption was expressed on an annual basis, biomass consumed was far greater in the tropical savannas (>20 times that of the far south). This trade-off is also apparent in the ratio of annual carbon consumption to net primary production (NPP). Across Australia's naturally vegetated land area, annual carbon consumption by surface fire is equivalent to about 11% of NPP, with a sharp contrast between temperate southern Australia (6%) and tropical northern Australia (46%). Our results emphasise that fire management to reduce greenhouse gas emissions should focus on fire prone tropical savanna landscapes, where the vast bulk of biomass consumption occurs globally. In these landscapes, grass biomass is a key driver of frequency, intensity and combustion completeness of surface fires, and management actions that increase grass biomass are likely to lead to increases in greenhouse gas emissions from savanna fires. © 2018 John Wiley & Sons Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/117565
Appears in Collections: 气候变化与战略
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Recommended Citation:
Murphy B.P.,Prior L.D.,Cochrane M.A.,et al. Biomass consumption by surface fires across Earth's most fire prone continent[J]. Global Change Biology,2019-01-01,25(1)