globalchange  > 气候减缓与适应
DOI: 10.1007/s10533-019-00544-x
WOS记录号: WOS:000458845600007
论文题名:
Historical soil drainage mediates the response of soil greenhouse gas emissions to intense precipitation events
作者: Krichels, Alexander1; DeLucia, Evan H.1,2; Sanford, Robert3; Chee-Sanford, Joanne4; Yang, Wendy H.1,2,3
通讯作者: Krichels, Alexander
刊名: BIOGEOCHEMISTRY
ISSN: 0168-2563
EISSN: 1573-515X
出版年: 2019
卷: 142, 期:3, 页码:425-442
语种: 英语
英文关键词: Denitrification ; Drainage ; Nitrification ; Nitrous oxide ; Redox ; Soil oxygen
WOS关键词: NITROUS-OXIDE EMISSIONS ; SPATIAL VARIABILITY ; INORGANIC NITROGEN ; IRON REDUCTION ; COMMUNITY STRUCTURE ; REDOX FLUCTUATIONS ; CARBON-DIOXIDE ; IN-SITU ; FOREST ; DENITRIFICATION
WOS学科分类: Environmental Sciences ; Geosciences, Multidisciplinary
WOS研究方向: Environmental Sciences & Ecology ; Geology
英文摘要:

Precipitation events are increasing in intensity in the Midwestern US due to climate change. This is resulting in flooding of poorly-drained upland soils, which can feed back on climate change by altering greenhouse gas (GHG) emissions, including nitrous oxide (N2O) and carbon dioxide (CO2). The objective of this study was to determine if soil drainage history affects the response of soil GHG emissions to rain events. To do this, we measured N2O and CO2 fluxes from poorly-drained (PD) and well-drained (WD) soils in an agricultural field in Urbana, Illinois before and after large rain events. We also performed a lab experiment to separate effects of soil drainage history from contemporary effects of ponding. Finally, we utilized stable isotope techniques to measure gross N2O dynamics and to determine the contributions of nitrifiers and denitrifiers to net N2O fluxes. We found that ponding of WD soils led to pulses of net N2O efflux caused by stimulation of gross N2O production by denitrifiers. In contrast, PD soils had high net N2O effluxes only between large rain events, and gross N2O production was inhibited following ponding. Soil CO2 efflux was greater from PD soils under lab conditions, but autotrophic respiration obscured this trend in the field. Soil GHG emissions were a result of different contemporary ponding status as well as historical soil drainage, suggesting that historical soil redox regimes regulate soil GHG dynamics in response to precipitation. These soil drainage legacy effects are likely important in predicting soil GHG feedback effects on climate change.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/129086
Appears in Collections:气候减缓与适应

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作者单位: 1.Univ Illinois, Program Ecol Evolut & Conservat Biol, Urbana, IL 61801 USA
2.Univ Illinois, Dept Plant Biol, Urbana, IL 61801 USA
3.Univ Illinois, Dept Geol, Urbana, IL 61801 USA
4.USDA ARS, Urbana, IL 61801 USA

Recommended Citation:
Krichels, Alexander,DeLucia, Evan H.,Sanford, Robert,et al. Historical soil drainage mediates the response of soil greenhouse gas emissions to intense precipitation events[J]. BIOGEOCHEMISTRY,2019-01-01,142(3):425-442
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