globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-014-9963-4
Scopus记录号: 2-s2.0-84900804970
论文题名:
Seasonal and geomorphic controls on N and P removal in riparian zones of the US Midwest
作者: Liu X.; Vidon P.; Jacinthe P.-A.; Fisher K.; Baker M.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2014
卷: 119, 期:2018-01-03
起始页码: 245
结束页码: 257
语种: 英语
英文关键词: Ammonium ; Fluxes ; Nitrate ; Phosphorus ; Removal ; Riparian zone
Scopus关键词: ammonium ; geomorphology ; mass transfer ; nitrate ; phosphorus ; riparian zone ; seasonal variation ; streamwater ; water chemistry ; water table ; Midwest ; United States
英文摘要: Riparian zones are an important strategy to mitigate N and P export to streams. However, their efficiency with respect to nitrate (NO3 -), ammonium (NH4 +), or soluble reactive phosphorus (SRP) in groundwater remains uncertain in the US Midwest. This study investigates water table fluctuations and NO3 -, NH4 +, and SRP concentration dynamics in two riparian zone types (outwash vs. glacial till) common in the upper US Midwest. During low water table periods, NO3 - removal was 93 % at WR (outwash site), and 75 % at LWD (glacial till site); but during high water table periods, NO3 - removal efficiencies dropped to 50 % at WR, and 14 % at LWD. Median seasonal mass fluxes of NO3 - removed at WR (9.4-21.7 mg N day-1 m-1 of stream length) and LWD (0.4-1.9 mg N day-1 m-1) were small compared to other riparian zones in glaciated landscapes. The WR site was a small SRP sink (0.114 and 0.118 mg day-1 m-1 during the dry period and wet period, respectively), while LWD acted as a small SRP source to the stream (0.004 mg day-1 m-1 during the dry period; 0.075 mg day-1 m-1 during the wet period). Both LWD and WR acted as sources of NH4 + to the stream with mass fluxes ranging from 0.17 to 7.75 mg N day-1 m-1. Although riparian zones in the US Midwest provide many ecosystem services, results suggest they are unlikely to efficiently mitigate N and P pollution in subsurface flow. © 2014 Springer International Publishing Switzerland.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83717
Appears in Collections:气候减缓与适应
气候变化事实与影响

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作者单位: Department of Earth Sciences, Indiana University Purdue University Indianapolis (IUPUI), 723 W. Michigan Street, Indianapolis, IN, 46202, United States; Department of Forest and Natural Resources Management, The State University of New York College of Environmental Science and Forestry (SUNY-ESF), Bray 320 1 Forestry Drive, Syracuse, NY, 13210, United States; Department of Geography and Environmental Systems, University of Maryland Baltimore County (UMBC), 1000 Hilltop Circle, Baltimore, MD, 21250, United States

Recommended Citation:
Liu X.,Vidon P.,Jacinthe P.-A.,et al. Seasonal and geomorphic controls on N and P removal in riparian zones of the US Midwest[J]. Biogeochemistry,2014-01-01,119(2018-01-03)
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