干旱区生态环境知识资源中心(Arid): Projected Climate-Fire Interactions Drive Forest to Shrubland Transition on an Arizona Sky Island

Arid

DOI	10.3389/fenvs.2020.00137
	Projected Climate-Fire Interactions Drive Forest to Shrubland Transition on an Arizona Sky Island
	O'Connor, Christopher D.; Falk, Donald A.; Garfin, Gregg M.
通讯作者	O'Connor, CD
来源期刊	FRONTIERS IN ENVIRONMENTAL SCIENCE
EISSN	2296-665X
出版年	2020
卷号	8
英文摘要	Climate stressors on the forests of the American Southwest are shifting species distributions across spatial scales, lengthening potential fire seasons, and increasing the incidence of drought and insect-related die-off. A legacy of fire exclusion in forests once adapted to frequent surface fires is exacerbating these changes. Reducing stand densities and surface fuel loads has been proposed as a means of moderating fire behavior while reducing competition for water, but it is not established whether thinning treatments and restoration of surface fire regimes will be enough to offset the multiple manifestations of a changing climate. We examined the potential for prescribed fuel treatments and restoration of historical fire frequencies to mitigate the effects of climate on forest species distributions, composition, total biomass, and fire severity. We used an ecosystem process model to simulate the effects of projected climate, fire, and active management interactions along an ecological gradient of shrublands, woodlands, and forests on a mountain range in Arizona in the United States. We used historical climate conditions as a baseline to compare results from projected climate for the period 2005-2055 with and without fire and with no fuel treatments, a single-entry fuel treatment, and a second fuel treatment after 20 years. Simulated desert grassland and shrub communities remained compositionally stable and maintained or expanded their extents while woodland and forest communities lost basal area and total biomass and receded to the coolest and wettest aspects and drainages even without fire. Initial fuel treatments reduced the extent and relative mortality of high-severity patches for the first two decades, and secondary treatments at simulation year 20 extended these effects for the remaining 30 years of simulation. Immediate and future fuel treatments showed potential to mitigate the severity of fire effects under projected conditions and slow the transition from forest to shrubland in some vegetation types, however, a reduction in basal area and spatial extent of some forest species occurred regardless of management actions. Results are being used to inform local land managers and partners of potential landscape changes resulting from climate alone and from climate-fire interactions and to coordinate active management of fuels across ownerships.
英文关键词	climate change fire severity type conversion FireBGCv2 ecosystem process modeling
类型	Article
语种	英语
开放获取类型	DOAJ Gold
收录类别	SCI-E
WOS记录号	WOS:000568326600001
WOS关键词	HIGH-SEVERITY FIRE ; PONDEROSA PINE FORESTS ; RANGE SHIFTS ; REGIONAL APPLICATIONS ; ECOSYSTEM PROCESSES ; LANDSCAPE FIRE ; GENERAL-MODEL ; OAK FOREST ; NEW-MEXICO ; DROUGHT
WOS类目	Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
来源机构	University of Arizona ; E18
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/326192
作者单位	[O'Connor, Christopher D.; Falk, Donald A.; Garfin, Gregg M.] Univ Arizona, Sch Nat Resources & Environm, Tucson, AZ USA; [Falk, Donald A.] Univ Arizona, Tree Ring Res Lab, Tucson, AZ 85721 USA; [O'Connor, Christopher D.] US Forest Serv, Rocky Mt Res Stn, USDA, Missoula, MT USA
推荐引用方式 GB/T 7714	O'Connor, Christopher D.,Falk, Donald A.,Garfin, Gregg M.. Projected Climate-Fire Interactions Drive Forest to Shrubland Transition on an Arizona Sky Island[J]. University of Arizona, E18,2020,8.
APA	O'Connor, Christopher D.,Falk, Donald A.,&Garfin, Gregg M..(2020).Projected Climate-Fire Interactions Drive Forest to Shrubland Transition on an Arizona Sky Island.FRONTIERS IN ENVIRONMENTAL SCIENCE,8.
MLA	O'Connor, Christopher D.,et al."Projected Climate-Fire Interactions Drive Forest to Shrubland Transition on an Arizona Sky Island".FRONTIERS IN ENVIRONMENTAL SCIENCE 8(2020).