Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2016WR019566 |
Environmental drivers of denitrification rates and denitrifying gene abundances in channels and riparian areas | |
Tomasek, Abigail1,2; Kozarek, Jessica L.1; Hondzo, Miki1,2; Lurndahl, Nicole3; Sadowsky, Michael J.3,4,5; Wang, Ping4; Staley, Christopher4 | |
2017-08-01 | |
发表期刊 | WATER RESOURCES RESEARCH
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ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:8 |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Intensive agriculture in the Midwestern United States contributes to excess nitrogen in surface water and groundwater, negatively affecting human health and aquatic ecosystems. Complete denitrification removes reactive nitrogen from aquatic environments and releases inert dinitrogen gas. We examined denitrification rates and the abundances of denitrifying genes and total bacteria at three sites in an agricultural watershed and in an experimental stream in Minnesota. Sampling was conducted along transects with a gradient from always inundated (in-channel), to periodically inundated, to noninundated conditions to determine how denitrification rates and gene abundances varied from channels to riparian areas with different inundation histories. Results indicate a coupling between environmental parameters, gene abundances, and denitrification rates at the in-channel locations, and limited to no coupling at the periodically inundated and noninundated locations, respectively. Nutrient-amended potential denitrification rates for the in-channel locations were significantly correlated (alpha =0.05) with five of six measured denitrifying gene abundances, whereas the periodically inundated and noninundated locations were each only significantly correlated with the abundance of one denitrifying gene. These results suggest that DNA-based analysis of denitrifying gene abundances alone cannot predict functional responses (denitrification potential), especially in studies with varying hydrologic regimes. A scaling analysis was performed to develop a predictive functional relationship relating environmental parameters to denitrification rates for in-channel locations. This method could be applied to other geographic and climatic regions to predict the occurrence of denitrification hot spots. |
英文关键词 | denitrification gene abundances nitrate inundation scaling agriculture |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000411202000011 |
WOS关键词 | GULF-OF-MEXICO ; SEDIMENT DENITRIFICATION ; ACETYLENE INHIBITION ; AGRICULTURAL STREAM ; RIVER FLOODPLAIN ; N2O EMISSIONS ; LAND-USE ; NITRATE ; NITROGEN ; SOIL |
WOS类目 | Environmental Sciences ; Limnology ; Water Resources |
WOS研究方向 | Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Water Resources |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/20848 |
专题 | 资源环境科学 |
作者单位 | 1.Univ Minnesota, St Anthony Falls Lab, Minneapolis, MN 55455 USA; 2.Univ Minnesota, Dept Civil Environm & Geoengn, Minneapolis, MN 55455 USA; 3.Univ Minnesota, Water Resources Sci, St Paul, MN 55108 USA; 4.Univ Minnesota, BioTechnol Inst, St Paul, MN 55108 USA; 5.Univ Minnesota, Dept Soil Water & Climate, St Paul, MN 55108 USA |
推荐引用方式 GB/T 7714 | Tomasek, Abigail,Kozarek, Jessica L.,Hondzo, Miki,et al. Environmental drivers of denitrification rates and denitrifying gene abundances in channels and riparian areas[J]. WATER RESOURCES RESEARCH,2017,53(8). |
APA | Tomasek, Abigail.,Kozarek, Jessica L..,Hondzo, Miki.,Lurndahl, Nicole.,Sadowsky, Michael J..,...&Staley, Christopher.(2017).Environmental drivers of denitrification rates and denitrifying gene abundances in channels and riparian areas.WATER RESOURCES RESEARCH,53(8). |
MLA | Tomasek, Abigail,et al."Environmental drivers of denitrification rates and denitrifying gene abundances in channels and riparian areas".WATER RESOURCES RESEARCH 53.8(2017). |
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