干旱区生态环境知识资源中心(Arid): Climate Impacts on Fire Risk in Desert Shrublands: A Modeling Study

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DOI	10.3389/fevo.2021.601877
	Climate Impacts on Fire Risk in Desert Shrublands: A Modeling Study
	Moloney, Kirk A.; Fuentes-Ramirez, Andres; Holzapfel, Claus
通讯作者	Moloney, KA (corresponding author), Iowa State Univ, Dept Ecol Evolut & Organismal Biol, Ames, IA 50011 USA.
来源期刊	FRONTIERS IN ECOLOGY AND EVOLUTION
ISSN	2296-701X
出版年	2021
卷号	9
英文摘要	Fire is recognized to be an important disturbance in many ecosystems worldwide, although desert ecosystems are not generally thought of as being prone to fire, primarily because of the lack of a continuous fuel bed. However, the likelihood of catastrophic fires in some desert systems is increasing due to the spread of exotic species, which can grow in the open. A second factor increasing fire risk may be extreme rainfall events caused by climate warming that can lead to an increase in fuel loads. Our work explores the impact of increased rainfall on fire risk in creosote shrublands that have been invaded by exotic grasses. We take experimental results from creosote (Larrea tridentata) shrublands in the Mojave and Sonoran Deserts of the Southwestern United States and develop spatially explicit simulation models to explore the impact of shifting rainfall regimes on biomass production and fire spread. In doing this, we explore two scales that are important in the spread of fire: (1) the macro-scale which considers the likelihood that fire arriving at one edge of a modeled landscape will successfully reach the opposite edge, leading to spread at a broader scale; and (2) the micro-scale, which considers fire spread within the landscape. We use a very simple model to first explore how changes in the distribution of fuel in the landscape impact the ability of fire to spread across and within the landscape. We then add more realism by including a direct consideration of creosote shrub distributions and biomass levels produced in different vegetation zones associated with distance from creosote. Our models show that the spread of fire at both macro-and micro-scales can be predicted from a knowledge of the statistical distribution of biomass in the field. The only additional information that is needed to predict the extent of fire spread is the amount of biomass at a local site (g m-2) required to ignite standing biomass in adjacent sites. This will depend upon species composition as well as amount of biomass, the hydration status of the vegetation and climatic conditions, such as windspeed and relative humidity.
英文关键词	creosote simulation percolation fire Mojave Sonoran climate change exotic invasive species
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000687632400001
WOS关键词	MOJAVE DESERT ; LARREA-TRIDENTATA ; SONORAN DESERT ; CREOSOTE-BUSH ; ANNUAL PLANTS ; SPATIAL-PATTERNS ; SOIL NUTRIENTS ; FOREST-FIRES ; PERCOLATION ; LANDSCAPES
WOS类目	Ecology
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363301
作者单位	[Moloney, Kirk A.] Iowa State Univ, Dept Ecol Evolut & Organismal Biol, Ames, IA 50011 USA; [Fuentes-Ramirez, Andres] Univ La Frontera, Dept Ciencias Forestales, Lab Biometria, Temuco, Chile; [Fuentes-Ramirez, Andres] Univ La Frontera, Butamallin Res Ctr Global Change, Temuco, Chile; [Fuentes-Ramirez, Andres] Inst Ecol & Biodiversidad IEB, Santiago, Chile; [Holzapfel, Claus] Rutgers State Univ, Dept Earth & Environm Sci, Newark, NJ USA
推荐引用方式 GB/T 7714	Moloney, Kirk A.,Fuentes-Ramirez, Andres,Holzapfel, Claus. Climate Impacts on Fire Risk in Desert Shrublands: A Modeling Study[J],2021,9.
APA	Moloney, Kirk A.,Fuentes-Ramirez, Andres,&Holzapfel, Claus.(2021).Climate Impacts on Fire Risk in Desert Shrublands: A Modeling Study.FRONTIERS IN ECOLOGY AND EVOLUTION,9.
MLA	Moloney, Kirk A.,et al."Climate Impacts on Fire Risk in Desert Shrublands: A Modeling Study".FRONTIERS IN ECOLOGY AND EVOLUTION 9(2021).