DOI: 10.1007/s10533-018-0431-4
Scopus记录号: 2-s2.0-85042213101
论文题名: Restored floodplains enhance denitrification compared to naturalized floodplains in agricultural streams
作者: Hanrahan B.R. ; Tank J.L. ; Dee M.M. ; Trentman M.T. ; Berg E.M. ; McMillan S.K.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2018
起始页码: 1
结束页码: 19
语种: 英语
英文关键词: Agricultural streams
; Denitrification
; Inset floodplains
; Restoration
; Two-stage ditch
英文摘要: Predicted changes in the timing and magnitude of storms have the potential to amplify water quality challenges associated with agricultural runoff. In agricultural streams of the Midwestern US, floodplain restoration has the potential to enhance inorganic nitrogen (N) removal by increasing the bioreactive surface area for microbially-mediated denitrification. The restoration of inset floodplains via construction of the two-stage ditch increases denitrification compared to channelized systems, however, little is known about how denitrification on restored floodplains compares to those formed naturally when stream channel management lapses. We used sacrificial microcosm incubations and membrane-inlet mass spectrometry (MIMS) to compare denitrification rates in floodplain soils collected along transects in both naturalized and restored floodplains; longitudinal transects spanned two zones in the active floodplain (near-stream, NS vs. middle, MID) and a third zone that reflected upland conditions in the riparian buffer strip (UP). Denitrification rates were 35–49% higher in the restored, inset floodplains compared to naturalized floodplains. Variation in denitrification rates were primarily explained by soil organic matter (OM) and OM was > 20% higher in restored floodplains than naturalized, highlighting the contrasts between stable, constructed floodplains with heterogeneous, depositional bars typical of naturalizing channels. Consequently, restored inset floodplains could remove > 70% more N than the naturalized floodplains during similar storm inundation events. © 2018 Springer International Publishing AG, part of Springer Nature Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83177
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 Biological Sciences, University of Notre Dame, 191 Galvin Life Sciences, Notre Dame, IN, United States; Department of Biological Sciences, University of Notre Dame, 189 Galvin Life Sciences, Notre Dame, IN, United States; Department of Biology, Loyola University Chicago, 1032 W. Sheridan Rd, Chicago, IL, United States; Department of Agricultural and Biological Engineering, Purdue University, 225 South University Street, West Lafayette, IN, United States
Recommended Citation:
Hanrahan B.R.,Tank J.L.,Dee M.M.,et al. Restored floodplains enhance denitrification compared to naturalized floodplains in agricultural streams[J]. Biogeochemistry,2018-01-01