DOI: 10.1007/s10533-017-0299-8
Scopus记录号: 2-s2.0-85011636330
论文题名: Critical zone properties control the fate of nitrogen during experimental rainfall in montane forests of the Colorado Front Range
作者: Hinckley E.-L.S. ; Ebel B.A. ; Barnes R.T. ; Murphy S.F. ; Anderson S.P.
刊名: Biogeochemistry
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2017
卷: 132, 期: 2018-01-02 起始页码: 213
结束页码: 231
语种: 英语
英文关键词: 15N tracer
; Convective storm
; Critical Zone Observatory
; Hillslope aspect
; Hydrologic response
; Lithium bromide
Scopus关键词: atmospheric deposition
; biomass
; bromide
; concentration (composition)
; critical analysis
; environmental fate
; experimental study
; hydrological response
; montane forest
; nitrate
; nitrogen
; rainfall
; source-sink dynamics
; tracer
; Boulder Creek [Wisconsin]
; Colorado
; Front Range
; Rocky Mountains
; United States
; Wisconsin
英文摘要: Several decades of research in alpine ecosystems have demonstrated links among the critical zone, hydrologic response, and the fate of elevated atmospheric nitrogen (N) deposition. Less research has occurred in mid-elevation forests, which may be important for retaining atmospheric N deposition. To explore the fate of N in the montane zone, we conducted plot-scale experimental rainfall events across a north–south transect within a catchment of the Boulder Creek Critical Zone Observatory. Rainfall events mimicked relatively common storms (20–50% annual exceedance probability) and were labeled with 15N-nitrate (NO3-) and lithium bromide tracers. For 4 weeks, we measured soil–water and leachate concentrations of Br−, 15NO3-, and NO3- daily, followed by recoveries of 15N species in bulk soils and microbial biomass. Tracers moved immediately into the subsurface of north-facing slope plots, exhibiting breakthrough at 10 and 30 cm over 22 days. Conversely, little transport of Br− or 15NO3- occurred in south-facing slope plots; tracers remained in soil or were lost via pathways not measured. Hillslope position was a significant determinant of soil 15N-NO3- recoveries, while soil depth and time were significant determinants of 15N recovery in microbial biomass. Overall, 15N recovery in microbial biomass and leachate was greater in upper north-facing slope plots than lower north-facing (toeslope) and both south-facing slope plots in August; by October, 15N recovery in microbial N biomass within south-facing slope plots had increased substantially. Our results point to the importance of soil properties in controlling the fate of N in mid-elevation forests during the summer season. © 2017, Springer International Publishing Switzerland. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/83306
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: Environmental Studies Program, University of Colorado, 4001 Discovery Dr, Boulder, CO, United States; Institute of Arctic and Alpine Research, 4001 Discovery Dr, Boulder, CO, United States; National Research Program, United States Geological Survey, Lakewood, CO, United States; Colorado College, 14 E. Cache La Poudre, Colorado Springs, CO, United States; United States Geological Survey, 3215 Marine St, Ste. E-127, Boulder, CO, United States; Department of Geography, 260 UCB, University of Colorado, Boulder, CO, United States
Recommended Citation:
Hinckley E.-L.S.,Ebel B.A.,Barnes R.T.,et al. Critical zone properties control the fate of nitrogen during experimental rainfall in montane forests of the Colorado Front Range[J]. Biogeochemistry,2017-01-01,132(2018-01-02)