Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/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
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ISSN | 0301-4797 |
EISSN | 1095-8630 |
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 |
推荐引用方式 GB/T 7714 | 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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