globalchange  > 影响、适应和脆弱性
DOI: 10.1111/gcb.13614
论文题名:
Climatic warming strengthens a positive feedback between alpine shrubs and fire
作者: Camac J.S.; Williams R.J.; Wahren C.-H.; Hoffmann A.A.; Vesk P.A.
刊名: Global Change Biology
出版年: 2017
卷: 23, 期:8
起始页码: 3249
结束页码: 3258
语种: 英语
英文关键词: Bayesian models ; biotic interactions ; gap dynamics ; growth ; mortality ; recruitment
英文摘要: Climate change is expected to increase fire activity and woody plant encroachment in arctic and alpine landscapes. However, the extent to which these increases interact to affect the structure, function and composition of alpine ecosystems is largely unknown. Here we use field surveys and experimental manipulations to examine how warming and fire affect recruitment, seedling growth and seedling survival in four dominant Australian alpine shrubs. We found that fire increased establishment of shrub seedlings by as much as 33-fold. Experimental warming also doubled growth rates of tall shrub seedlings and could potentially increase their survival. By contrast, warming had no effect on shrub recruitment, postfire tussock regeneration, or how tussock grass affected shrub seedling growth and survival. These findings indicate that warming, coupled with more frequent or severe fires, will likely result in an increase in the cover and abundance of evergreen shrubs. Given that shrubs are one of the most flammable components in alpine and tundra environments, warming is likely to strengthen an existing feedback between woody species abundance and fire in these ecosystems. © 2017 John Wiley & Sons Ltd
资助项目: Camac, J.S. ; The Centre of Excellence for Environmental Decisions, School of BioSciences, The University of MelbourneAustralia ; 电子邮件: james.camac@gmail.com
Citation statistics:
被引频次[WOS]:36   [查看WOS记录]     [查看WOS中相关记录]
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/60887
Appears in Collections:影响、适应和脆弱性

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作者单位: The Centre of Excellence for Environmental Decisions, School of BioSciences, The University of Melbourne, Parkville, VIC, Australia; Research Centre for Applied Alpine Ecology, La Trobe University, Melbourne, VIC, Australia; Research Institute for the Environment and Livelihoods, Charles Darwin University, Darwin, NT, Australia; Bio21 Institute, School of BioSciences, The University of Melbourne, Melbourne, VIC, Australia

Recommended Citation:
Camac J.S.,Williams R.J.,Wahren C.-H.,et al. Climatic warming strengthens a positive feedback between alpine shrubs and fire[J]. Global Change Biology,2017-01-01,23(8)
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