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globalchange > 过去全球变化的重建

DOI:	10.1371/journal.pone.0132256
论文题名:	Urban Stream Burial Increases Watershed-Scale Nitrate Export
作者:	Jake J. Beaulieu; Heather E. Golden; Christopher D. Knightes; Paul M. Mayer; Sujay S. Kaushal; Michael J. Pennino; Clay P. Arango; David A. Balz; Colleen M. Elonen; Ken M. Fritz; Brian H. Hill
刊名:	PLOS ONE
ISSN:	1932-6203
出版年:	2015
发表日期:	2015-7-17
卷:	10, 期:7
语种:	英语
英文关键词:	Rivers ; Network analysis ; Nitrates ; Simulation and modeling ; Watersheds ; Ecosystems ; Surface water ; Urban ecology
英文摘要:	Nitrogen (N) uptake in streams is an important ecosystem service that reduces nutrient loading to downstream ecosystems. Here we synthesize studies that investigated the effects of urban stream burial on N-uptake in two metropolitan areas and use simulation modeling to scale our measurements to the broader watershed scale. We report that nitrate travels on average 18 times farther downstream in buried than in open streams before being removed from the water column, indicating that burial substantially reduces N uptake in streams. Simulation modeling suggests that as burial expands throughout a river network, N uptake rates increase in the remaining open reaches which somewhat offsets reduced N uptake in buried reaches. This is particularly true at low levels of stream burial. At higher levels of stream burial, however, open reaches become rare and cumulative N uptake across all open reaches in the watershed rapidly declines. As a result, watershed-scale N export increases slowly at low levels of stream burial, after which increases in export become more pronounced. Stream burial in the lower, more urbanized portions of the watershed had a greater effect on N export than an equivalent amount of stream burial in the upper watershed. We suggest that stream daylighting (i.e., uncovering buried streams) can increase watershed-scale N retention.
URL:	http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0132256&type=printable
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资源类型:	期刊论文
标识符:	http://119.78.100.158/handle/2HF3EXSE/20236
Appears in Collections:	过去全球变化的重建影响、适应和脆弱性科学计划与规划气候变化与战略全球变化的国际研究计划气候减缓与适应气候变化事实与影响

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File Name/ File Size	Content Type	Version	Access	License
journal.pone.0132256.PDF（10600KB）	期刊论文	作者接受稿	开放获取	CC BY-NC-SA	View Download

作者单位:

US EPA, Office of Research and Development, National Risk Management Research Laboratory, Cincinnati, OH, United States of America;US EPA, Office of Research and Development, National Exposure Research Laboratory, Cincinnati, OH, United States of America;US EPA, Office of Research and Development, National Exposure Research Laboratory, Athens, GA, United States of America;US EPA, Office of Research and Development, National Risk Management Research Laboratory, Ada, OK, United States of America;University of Maryland, Department of Geology and Earth Systems Interdisciplinary Center, College Park, MD, United States of America;University of Maryland, Department of Geology and Earth Systems Interdisciplinary Center, College Park, MD, United States of America;Central Washington University, Department of Biological Sciences, Ellensburg, WA, United States of America;Pegasus Technical Services, Cincinnati, OH, United States of America;US EPA, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Duluth, MN, United States of America;US EPA, Office of Research and Development, National Exposure Research Laboratory, Cincinnati, OH, United States of America;US EPA, Office of Research and Development, National Health and Environmental Effects Research Laboratory, Duluth, MN, United States of America

Recommended Citation:

Jake J. Beaulieu,Heather E. Golden,Christopher D. Knightes,et al. Urban Stream Burial Increases Watershed-Scale Nitrate Export[J]. PLOS ONE,2015-01-01,10(7)

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