Arid
DOI10.1016/j.jenvman.2012.09.026
Effects of grazing on leaf area index, fractional cover and evapotranspiration by a desert phreatophyte community at a former uranium mill site on the Colorado Plateau
Bresloff, Cynthia J.1; Nguyen, Uyen1; Glenn, Edward P.1; Waugh, Jody2; Nagler, Pamela L.3
通讯作者Glenn, Edward P.
来源期刊JOURNAL OF ENVIRONMENTAL MANAGEMENT
ISSN0301-4797
EISSN1095-8630
出版年2013
卷号114页码:92-104
英文摘要

This study employed ground and remote sensing methods to monitor the effects of grazing on leaf area index (LAI), fractional cover (f(c)) and evapotranspiration (ET) of a desert phreatophyte community over an 11 year period at a former uranium mill site on the Colorado Plateau, U.S. Nitrate, ammonium and sulfate are migrating away from the mill site in a shallow alluvial aquifer. The phreatophyte community, consisting of Atriplex canescens (ATCA) and Sarcobatus vermiculatus (SAVE) shrubs, intercepts groundwater and could potentially slow the movement of the contaminant plume through evapotranspiration (ET). However, the site has been heavily grazed by livestock, reducing plant cover and LAI. We used livestock exclosures and revegetation plots to determine the effects of grazing on LAI, f(c) and ET, then projected the findings over the whole site using multi-platform remote sensing methods. We show that ET is approximately equal to annual precipitation at the site, but when ATCA and SAVE are protected from grazing they can develop high f(c) and LAI values, and ET can exceed annual precipitation, with the excess coming from groundwater discharge. Therefore, control of grazing could be an effective method to slow migration of contaminants at this and similar sites in the western U.S. (C) 2012 Elsevier Ltd. All rights reserved.


英文关键词Remote sensing MODIS Landsat Quickbird Phytoremediation
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000314371700010
WOS关键词GREAT-BASIN ; VEGETATION COVER ; EDDY COVARIANCE ; GROUNDWATER ; SOIL ; SHRUBS ; MODIS ; MANAGEMENT ; DISCHARGE ; RECHARGE
WOS类目Environmental Sciences
WOS研究方向Environmental Sciences & Ecology
来源机构University of Arizona ; United States Geological Survey
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/178273
作者单位1.Univ Arizona, Environm Res Lab, Tucson, AZ 85706 USA;
2.SM Stoller Corp, Environm Sci Lab, Grand Junction, CO 81503 USA;
3.Univ Arizona, Sonoran Desert Res Stn, US Geol Survey, Tucson, AZ 85721 USA
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Bresloff, Cynthia J.,Nguyen, Uyen,Glenn, Edward P.,et al. Effects of grazing on leaf area index, fractional cover and evapotranspiration by a desert phreatophyte community at a former uranium mill site on the Colorado Plateau[J]. University of Arizona, United States Geological Survey,2013,114:92-104.
APA Bresloff, Cynthia J.,Nguyen, Uyen,Glenn, Edward P.,Waugh, Jody,&Nagler, Pamela L..(2013).Effects of grazing on leaf area index, fractional cover and evapotranspiration by a desert phreatophyte community at a former uranium mill site on the Colorado Plateau.JOURNAL OF ENVIRONMENTAL MANAGEMENT,114,92-104.
MLA Bresloff, Cynthia J.,et al."Effects of grazing on leaf area index, fractional cover and evapotranspiration by a desert phreatophyte community at a former uranium mill site on the Colorado Plateau".JOURNAL OF ENVIRONMENTAL MANAGEMENT 114(2013):92-104.
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