干旱区生态环境知识资源中心(Arid): Spatial and temporal changes in aeolian redistribution of sediments and nutrients following fire

Arid

DOI	10.1002/esp.4913
	Spatial and temporal changes in aeolian redistribution of sediments and nutrients following fire
	Roehner, Clayton; Pierce, Jennifer L.; Yager, Elowyn M.
通讯作者	Pierce, JL
来源期刊	EARTH SURFACE PROCESSES AND LANDFORMS
ISSN	0197-9337
EISSN	1096-9837
出版年	2020
卷号	45 期号:11 页码:2556-2571
英文摘要	Wildfires can profoundly alter rates, magnitudes, and ecological influences of aeolian redistribution of sediments and nutrients. This study examines the influence of fire in a semi-arid ecosystem using 2 years of continuous passive dust trap data in the northern Great Basin, USA. We analyse the mass flux, organic material content, grain size distribution, and geochemistry of the collected samples to trace the fingerprint of the 2015 Soda Fire through space and time. In areas not affected by fire, dust is characterized by silt-sized median grains, a geochemical signature consistent with a playa source area, and spatially consistent but seasonally variable dust flux rates. Following fire, dust flux increases significantly within and near the burned area. At burned and topographically sheltered sites, dust deposition in the eighth month following fire was 190% higher than dust deposition 2 years post-revegetation. Topographically exposed sites recorded only modest increases in dust deposition following fire. Analysis of organic matter indicates all dust samples (both burned and unburned) contained an average of 45% organic matter compared to a watershed average of 1.6% organic matter in soils. Geochemical and seasonal dust deposition data from 12 dust traps at a range of elevations indicate that with the removal of stabilizing vegetation after wildfire, differences in topographic position and wind direction lead to preferential redistribution of material across a burned landscape over hillslope scales (0-10 km). We posit post-fire aeolian redistribution of locally derived material to topographically controlled positions is an important control on the spatial variability of soil depth and characteristics in drylands with complex topography. (c) 2020 John Wiley & Sons, Ltd.
英文关键词	aeolian deposition post-fire wind erosion pyrogeomorphology semi-arid landscape evolution soil variability
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000545263700001
WOS关键词	WIND-EROSION ; SAGEBRUSH STEPPE ; DUST DEPOSITION ; SOIL CARBON ; SEMIARID SHRUBLAND ; DESERT GRASSLAND ; SOUTHERN NEVADA ; ORGANIC-MATTER ; TRANSPORT ; WILDFIRE
WOS类目	Geography, Physical ; Geosciences, Multidisciplinary
WOS研究方向	Physical Geography ; Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/324922
作者单位	[Roehner, Clayton; Pierce, Jennifer L.] Boise State Univ, Dept Geosci, 1910 Univ Dr, Boise, ID 83725 USA; [Yager, Elowyn M.] Univ Idaho, Dept Civil & Environm Engn, Coeur Dalene, ID 83814 USA
推荐引用方式 GB/T 7714	Roehner, Clayton,Pierce, Jennifer L.,Yager, Elowyn M.. Spatial and temporal changes in aeolian redistribution of sediments and nutrients following fire[J],2020,45(11):2556-2571.
APA	Roehner, Clayton,Pierce, Jennifer L.,&Yager, Elowyn M..(2020).Spatial and temporal changes in aeolian redistribution of sediments and nutrients following fire.EARTH SURFACE PROCESSES AND LANDFORMS,45(11),2556-2571.
MLA	Roehner, Clayton,et al."Spatial and temporal changes in aeolian redistribution of sediments and nutrients following fire".EARTH SURFACE PROCESSES AND LANDFORMS 45.11(2020):2556-2571.