干旱区生态环境知识资源中心(Arid): Evaluating Drought Impact on Postfire Recovery of Chaparral Across Southern California

Arid

DOI	10.1007/s10021-020-00551-2
	Evaluating Drought Impact on Postfire Recovery of Chaparral Across Southern California
	Storey, Emanuel A.; Stow, Douglas A.; Roberts, Dar A.; O'Leary, John F.; Davis, Frank W.
通讯作者	Storey, EA
来源期刊	ECOSYSTEMS
ISSN	1432-9840
EISSN	1435-0629
英文摘要	Chaparral shrubs in southern California may be vulnerable to frequent fire and severe drought. Drought may diminish postfire recovery or worsen impact of short-interval fires. Field-based studies have not shown the extent and magnitude of drought effects on recovery, which may vary among chaparral types and climatic zones. We tracked regional patterns of shrub cover based on June-solstice Landsat Normalized Difference Vegetation Index series, compared between the periods 1984-1989 and 2014-2018. High spatial resolution ortho-imagery was used to map shrub cover in distributed sample plots, to empirically constrain the Landsat-based estimates of mature-stage lateral canopy recovery. We evaluated precipitation, climatic water deficit (CWD), and Palmer Drought Severity Index in summer and wet seasons preceding and following fire, as regional predictors of recovery in 982 locations between the Pacific Coast and inland deserts. Wet-season CWD was the strongest drought-metric predictor of recovery, contributing 34-43% of explanatory power in multivariate regressions (R-2 = 0.16-0.42). Limited recovery linked to drought was most prevalent in transmontane chamise chaparral; impacts were minor in montane areas, and in mixed and montane chaparral types. Elevation was correlated negatively to recovery of transmontane chamise; this may imply acute drought sensitivity in resprouts which predominate seedlings at higher elevations. Landsat Visible Atmospherically Resistant Index (sensitive to live-fuel moisture) was evaluated as a landscape-scale predictor of recovery and explained the greatest amount of variance in a multivariate regression (R-2 = 0.53). We find that drought severity was more closely related to recovery differences among twice-burned sites than was fire-return interval. Summarily, drought has a major role in long-term shrub cover reduction within xeric chaparral ecotones bounding the Mojave Desert and Colorado Desert, likely in tandem with other global change stressors.
英文关键词	Vegetation change Fire recovery Time series analysis Drought impact Aridification Ecological management
类型	Article ; Early Access
语种	英语
开放获取类型	Green Accepted
收录类别	SCI-E
WOS记录号	WOS:000579711400002
WOS关键词	VEGETATION RECOVERY ; TIME-SERIES ; CLIMATE-CHANGE ; MEDITERRANEAN LANDSCAPE ; SHORT-INTERVAL ; BURN SEVERITY ; FOREST-FIRES ; INDEX ; MORTALITY ; MOISTURE
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/2XILL650/328374
作者单位	[Storey, Emanuel A.; Stow, Douglas A.; O'Leary, John F.] San Diego State Univ, Dept Geog, 5500 Campanile Dr, San Diego, CA 92182 USA; [Roberts, Dar A.] Univ Calif Santa Barbara, Dept Geog, 3611 Ellison Hall, Santa Barbara, CA 93106 USA; [Davis, Frank W.] Univ Calif Santa Barbara, Bren Sch Environm Sci & Management, 2400 Bren Hall, Santa Barbara, CA 93106 USA
推荐引用方式 GB/T 7714	Storey, Emanuel A.,Stow, Douglas A.,Roberts, Dar A.,et al. Evaluating Drought Impact on Postfire Recovery of Chaparral Across Southern California[J].
APA	Storey, Emanuel A.,Stow, Douglas A.,Roberts, Dar A.,O'Leary, John F.,&Davis, Frank W..
MLA	Storey, Emanuel A.,et al."Evaluating Drought Impact on Postfire Recovery of Chaparral Across Southern California".ECOSYSTEMS