Arid
DOI10.1111/j.1466-8238.2009.00512.x
A biogeographic model of fire regimes in Australia: current and future implications
Bradstock, R. A.
通讯作者Bradstock, R. A.
来源期刊GLOBAL ECOLOGY AND BIOGEOGRAPHY
ISSN1466-822X
出版年2010
卷号19期号:2页码:145-158
英文摘要

Aim


Patterns of fire regimes across Australia exhibit biogeographic variation in response to four processes. Variations in area burned and fire frequency result from differences in the rates of ’switching’ of biomass growth, availability to burn, fire weather and ignition. Therefore differing processes limit fire (i.e. the lowest rate of switching) in differing ecosystems. Current and future trends in fire frequency were explored on this basis.


Location


Case studies of forests (cool temperate to tropical) and woodlands (temperate to arid) were examined. These represent a broad range of Australian biomes and current fire regimes.


Methods


Information on the four processes was applied to each case study and the potential minimum length of interfire interval was predicted and compared to current trends. The potential effects of global change on the processes were then assessed and future trends in fire regimes were predicted.


Results


Variations in fire regimes are primarily related to fluctuations in available moisture and dominance by either woody or herbaceous plant cover. Fire in woodland communities (dry climates) is limited by growth of herbaceous fuels (biomass), whereas in forests (wet climates) limitation is by fuel moisture (availability to burn) and fire weather. Increasing dryness in woodland communities will decrease potential fire frequency, while the opposite applies in forests. In the tropics, both forms of limitation are weak due to the annual wet/dry climate. Future change may therefore be constrained.


Main conclusions


Increasing dryness may diminish fire activity over much of Australia (dominance of dry woodlands), though increases may occur in temperate forests. Elevated CO(2) effects may confound or reinforce these trends. The prognosis for the future fire regime in Australia is therefore uncertain.


英文关键词Australia climate fire regimes forest fuel global change ignition moisture woodlands
类型Article
语种英语
国家Australia
收录类别SCI-E
WOS记录号WOS:000274320600001
WOS关键词SOUTH-EASTERN AUSTRALIA ; KAKADU-NATIONAL-PARK ; CLIMATE-CHANGE ; NORTHERN AUSTRALIA ; LAND-USE ; RAINFALL VARIABILITY ; TROPICAL SAVANNAS ; STAND STRUCTURES ; VEGETATION ; FOREST
WOS类目Ecology ; Geography, Physical
WOS研究方向Environmental Sciences & Ecology ; Physical Geography
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/164414
作者单位(1)Univ Wollongong, Ctr Environm Risk Management Bushfires, Inst Conservat Biol & Law, Wollongong, NSW 2522, Australia
推荐引用方式
GB/T 7714
Bradstock, R. A.. A biogeographic model of fire regimes in Australia: current and future implications[J],2010,19(2):145-158.
APA Bradstock, R. A..(2010).A biogeographic model of fire regimes in Australia: current and future implications.GLOBAL ECOLOGY AND BIOGEOGRAPHY,19(2),145-158.
MLA Bradstock, R. A.."A biogeographic model of fire regimes in Australia: current and future implications".GLOBAL ECOLOGY AND BIOGEOGRAPHY 19.2(2010):145-158.
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