Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1038/s41561-017-0056-6 |
Contribution of wetlands to nitrate removal at the watershed scale | |
Hansen, Amy T.1,2,3; Dolph, Christine L.3; Foufoula-Georgiou, Efi1,2,4; Finlay, Jacques C.1,2,3 | |
2018-02-01 | |
发表期刊 | NATURE GEOSCIENCE |
ISSN | 1752-0894 |
EISSN | 1752-0908 |
出版年 | 2018 |
卷号 | 11期号:2页码:127-+ |
文章类型 | Article |
语种 | 英语 |
国家 | USA |
英文摘要 | Intensively managed row crop agriculture has fundamentally changed Earth surface processes within the Mississippi River basin through large-scale alterations of land cover, hydrology and reactive nitrogen availability. These changes have created leaky landscapes where excess agriculturally derived nitrate degrades riverine water quality at local, regional and continental scales. Individually, wetlands are known to remove nitrate but the conditions under which multiple wetlands meaningfully reduce riverine nitrate concentration have not been established. Only one region of the Mississippi River basin-the 44,000 km(2) Minnesota River basin-still contains enough wetland cover within its intensively agriculturally managed watersheds to empirically address this question. Here we combine high-resolution land cover data for the Minnesota River basin with spatially extensive repeat water sampling data. By clearly isolating the effect of wetlands from crop cover, we show that, under moderate-high streamflow, wetlands are five times more efficient per unit area at reducing riverine nitrate concentration than the most effective land-based nitrogen mitigation strategies, which include cover crops and land retirement. Our results suggest that wetland restorations that account for the effects of spatial position in stream networks could provide a much greater benefit to water quality then previously assumed. |
领域 | 地球科学 ; 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423843600011 |
WOS关键词 | OF-MEXICO HYPOXIA ; MISSISSIPPI RIVER ; AGRICULTURAL WATERSHEDS ; LAND-COVER ; NITROGEN ; PHOSPHORUS ; EXPORT ; DENITRIFICATION ; LANDSCAPES ; RETENTION |
WOS类目 | Geosciences, Multidisciplinary |
WOS研究方向 | Geology |
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/34866 |
专题 | 地球科学 气候变化 |
作者单位 | 1.Univ Minnesota, Coll Sci & Engn, St Anthony Falls Lab, Minneapolis, MN 55455 USA; 2.Univ Minnesota, Coll Sci & Engn, Natl Ctr Earth Surface Dynam, Minneapolis, MN 55455 USA; 3.Univ Minnesota, Dept Ecol Evolut & Behav, St Paul, MN 55108 USA; 4.Univ Calif Irvine, Dept Civil & Environm Engn, Henry Samueli Sch Engn, Irvine, CA USA |
推荐引用方式 GB/T 7714 | Hansen, Amy T.,Dolph, Christine L.,Foufoula-Georgiou, Efi,et al. Contribution of wetlands to nitrate removal at the watershed scale[J]. NATURE GEOSCIENCE,2018,11(2):127-+. |
APA | Hansen, Amy T.,Dolph, Christine L.,Foufoula-Georgiou, Efi,&Finlay, Jacques C..(2018).Contribution of wetlands to nitrate removal at the watershed scale.NATURE GEOSCIENCE,11(2),127-+. |
MLA | Hansen, Amy T.,et al."Contribution of wetlands to nitrate removal at the watershed scale".NATURE GEOSCIENCE 11.2(2018):127-+. |
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