Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/eap.1709 |
Controls on denitrification potential in nitrate-rich waterways and riparian zones of an irrigated agricultural setting | |
Webster, Alex J.1,2; Groffman, Peter M.3,4,5; Cadenasso, Mary L.1 | |
通讯作者 | Webster, Alex J. |
来源期刊 | ECOLOGICAL APPLICATIONS
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ISSN | 1051-0761 |
EISSN | 1939-5582 |
出版年 | 2018 |
卷号 | 28期号:4页码:1055-1067 |
英文摘要 | Denitrification, the microbial conversion of NO3 to N gases, is an important process contributing to whether lotic and riparian ecosystems act as sinks for excess NO3- from agricultural activities. Though agricultural waterways and riparian zones have been a focus of denitrification research for decades, almost none of this research has occurred in the irrigated agricultural settings of arid and semiarid climates. In this study, we conducted a broad survey of denitrification potential in riparian soils and channel sediments from 79 waterway reaches in the irrigated agricultural landscape of California’s Central Valley. With this approach, we sought to capture the wide range of variation that arose from diverse waterway management and fluctuating flow conditions, and use this variation to identify promising management interventions. We explored associations of denitrification potentials with surface water NO3--N, organic matter, flow conditions, vegetation cover, near-channel riparian bank slope, and channel geomorphic features using generalized linear mixed models. We found strong associations of sediment denitrification potentials with reach flow conditions, which we hypothesize was the result of variation in microbial communities’ tolerance to dry-wet cycles. Denitrification potentials in riparian soils, in contrast, did not appear affected by flow conditions, but instead were associated with organic matter, vegetation cover, and bank slope in the riparian zone. These results suggest a strong need for further work on how denitrification responds to varying flow conditions and dry-wet cycles in non-perennial lotic ecosystems. Our findings also demonstrate that denitrifier communities respond to key features of waterway management, which can therefore be leveraged to control denitrification through a variety of management actions. |
英文关键词 | agricultural streams denitrification intermittent streams nitrate riparian zones sediment |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000434092200016 |
WOS关键词 | LANDSCAPE SCALE ; ENZYME-ACTIVITY ; STREAM ; SOIL ; GAS ; ECOSYSTEM ; SUSTAINABILITY ; HETEROGENEITY ; DESICCATION ; DISTURBANCE |
WOS类目 | Ecology ; Environmental Sciences |
WOS研究方向 | Environmental Sciences & Ecology |
来源机构 | University of California, Davis |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/208693 |
作者单位 | 1.Univ Calif Davis, Dept Plant Sci, Shields Ave, Davis, CA 95616 USA; 2.Univ Calif Davis, Grad Grp Ecol, Shields Ave, Davis, CA 95616 USA; 3.Cary Inst Ecosyst Studies, Millbrook, NY 12545 USA; 4.CUNY, Adv Res Ctr, New York, NY 12210 USA; 5.CUNY Brooklyn Coll, New York, NY 12210 USA |
推荐引用方式 GB/T 7714 | Webster, Alex J.,Groffman, Peter M.,Cadenasso, Mary L.. Controls on denitrification potential in nitrate-rich waterways and riparian zones of an irrigated agricultural setting[J]. University of California, Davis,2018,28(4):1055-1067. |
APA | Webster, Alex J.,Groffman, Peter M.,&Cadenasso, Mary L..(2018).Controls on denitrification potential in nitrate-rich waterways and riparian zones of an irrigated agricultural setting.ECOLOGICAL APPLICATIONS,28(4),1055-1067. |
MLA | Webster, Alex J.,et al."Controls on denitrification potential in nitrate-rich waterways and riparian zones of an irrigated agricultural setting".ECOLOGICAL APPLICATIONS 28.4(2018):1055-1067. |
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