Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1002/2017WR020709 |
Hyporheic Passive Flux Meters Reveal Inverse Vertical Zonation and High Seasonality of Nitrogen Processing in an Anthropogenically Modified Stream (Holtemme, Germany) | |
Kunz, Julia Vanessa1; Annable, Michael D.2; Rao, Suresh3; Rode, Michael1; Borchardt, Dietrich1 | |
2017-12-01 | |
发表期刊 | WATER RESOURCES RESEARCH |
ISSN | 0043-1397 |
EISSN | 1944-7973 |
出版年 | 2017 |
卷号 | 53期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | Germany; USA |
英文摘要 | Transformation and retention of nitrogen and other biologically reactive solutes in the hyporheic zones of running water contribute to an essential ecosystem service. However, the synoptic impact of intense agricultural or urban land-uses, elevated nutrient loading, flow alterations, riparian clear-cutting, and channelization on the source-sink behavior of solutes in hyporheic zones remains largely uncharacterized and unquantified. Therefore, we studied nutrient dynamics in a hydromorphologically and chemically modified stream reach using a new monitoring approach allowing the simultaneous measurement of nutrient and water flux through a screened area in the subsurface of rivers (hyporheic passive flux meter, HPFM). With HPFMs we directly assessed time-integrated lateral hyporheic nitrate fluxes during early spring and midsummer covering different temperature and discharge regimes. Contrary to our expectations, higher stream discharge coincided with substantially lower hyporheic exchange rates. While in streams featuring a natural morphology, bed form induced exchange commonly increases with surface flow, the influence of groundwater level was dominant in this reach. Furthermore, in contrast to less impacted environments, where progressive substrate depletion with depths reduces metabolic rates in the subsurface, we identified not the upper, but the intermediate layer of the hyporheic zone as hot spot of nutrient turnover. Overall, the hyporheic zone at the study site functioned partly as nitrate source, partly as a sink. Neither of the commonly used determinants redox state and residence time could explain this source or sink function. Our results give clear evidence to carefully transfer the knowledge of hyporheic zone processes from "natural'' systems to anthropologically modified streams. |
领域 | 资源环境 |
收录类别 | SCI-E |
WOS记录号 | WOS:000423299000010 |
WOS关键词 | ORGANIC-CARBON ; SURFACE-WATER ; NITRATE CONCENTRATION ; RUNNING WATERS ; FINE-SEDIMENT ; URBAN STREAMS ; LARGE RIVER ; ZONE ; DENITRIFICATION ; EXCHANGE |
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/21135 |
专题 | 资源环境科学 |
作者单位 | 1.UFZ Helmholtz Ctr Environm Res, Magdeburg, Germany; 2.Univ Florida, Dept Environm Engn Sci, Gainesville, FL 32611 USA; 3.Purdue Univ, Perdue Coll Engn, Lafayette, IN USA |
推荐引用方式 GB/T 7714 | Kunz, Julia Vanessa,Annable, Michael D.,Rao, Suresh,et al. Hyporheic Passive Flux Meters Reveal Inverse Vertical Zonation and High Seasonality of Nitrogen Processing in an Anthropogenically Modified Stream (Holtemme, Germany)[J]. WATER RESOURCES RESEARCH,2017,53(12). |
APA | Kunz, Julia Vanessa,Annable, Michael D.,Rao, Suresh,Rode, Michael,&Borchardt, Dietrich.(2017).Hyporheic Passive Flux Meters Reveal Inverse Vertical Zonation and High Seasonality of Nitrogen Processing in an Anthropogenically Modified Stream (Holtemme, Germany).WATER RESOURCES RESEARCH,53(12). |
MLA | Kunz, Julia Vanessa,et al."Hyporheic Passive Flux Meters Reveal Inverse Vertical Zonation and High Seasonality of Nitrogen Processing in an Anthropogenically Modified Stream (Holtemme, Germany)".WATER RESOURCES RESEARCH 53.12(2017). |
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