Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.14460 |
Biomass consumption by surface fires across Earth's most fire prone continent | |
Murphy, Brett P.1; Prior, Lynda D.2; Cochrane, Mark A.3; Williamson, Grant J.2; Bowman, David M. J. S.1 | |
2019 | |
发表期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2019 |
卷号 | 25期号:1页码:254-268 |
文章类型 | Article |
语种 | 英语 |
国家 | Australia; USA |
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. |
英文关键词 | carbon fire frequency fire regimes fire severity net primary productivity tropical savanna wildfire |
领域 | 气候变化 ; 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000453370700021 |
WOS关键词 | NORTHERN AUSTRALIA ; BURNED AREA ; SAVANNA ; CARBON ; FOREST ; FUTURE ; EMISSIONS ; MANAGEMENT ; REGIMES ; DRIVEN |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/16962 |
专题 | 气候变化 资源环境科学 |
作者单位 | 1.Charles Darwin Univ, Res Inst Environm & Livelihoods, Darwin, NT, Australia; 2.Univ Tasmania, Sch Biol Sci, Hobart, Tas, Australia; 3.Univ Maryland, Ctr Environm Sci, Appalachian Lab, Frostburg, MD USA |
推荐引用方式 GB/T 7714 | Murphy, Brett P.,Prior, Lynda D.,Cochrane, Mark A.,et al. Biomass consumption by surface fires across Earth's most fire prone continent[J]. GLOBAL CHANGE BIOLOGY,2019,25(1):254-268. |
APA | Murphy, Brett P.,Prior, Lynda D.,Cochrane, Mark A.,Williamson, Grant J.,&Bowman, David M. J. S..(2019).Biomass consumption by surface fires across Earth's most fire prone continent.GLOBAL CHANGE BIOLOGY,25(1),254-268. |
MLA | Murphy, Brett P.,et al."Biomass consumption by surface fires across Earth's most fire prone continent".GLOBAL CHANGE BIOLOGY 25.1(2019):254-268. |
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