Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.4319/lo.2009.54.6.2128 |
Hydrologic control of nitrogen removal, storage, and export in a mountain stream | |
Hall, Robert O., Jr.1; Baker, Michelle A.2,3; Arp, Christopher D.2,3; Koch, Benjamin J.1,4 | |
通讯作者 | Hall, Robert O., Jr. |
来源期刊 | LIMNOLOGY AND OCEANOGRAPHY
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ISSN | 0024-3590 |
EISSN | 1939-5590 |
出版年 | 2009 |
卷号 | 54期号:6页码:2128-2142 |
英文摘要 | Nutrient cycling and export in streams and rivers should vary with flow regime, yet most studies of stream nutrient transformation do not include hydrologic variability. We used a stable isotope tracer of nitrogen (N-15) to measure nitrate (NO3-) uptake, storage, and export in a mountain stream, Spring Creek, Idaho, U. S. A. We conducted two tracer tests of 2-week duration during snowmelt and baseflow. Dissolved and particulate forms of N-15 were monitored over three seasons to test the hypothesis that stream N cycling would be dominated by export during floods, and storage during low flow. Floods exported more N than during baseflow conditions; however, snowmelt floods had higher than expected demand for NO3- because of hyporheic exchange. Residence times of benthic N during both tracer tests were longer than 100 d for ephemeral pools such as benthic algae and wood biofilms. Residence times were much longer in fine detritus, insects, and the particulate N from the hyporheic zone, showing that assimilation and hydrologic storage can be important mechanisms for retaining particulate N. Of the tracer N stored in the stream, the primary form of export was via seston during periods of high flows, produced by summer rainstorms or spring snowmelt the following year. Spring Creek is not necessarily a conduit for nutrients during high flow; hydrologic exchange between the stream and its valley represents an important storage mechanism. |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000270390200026 |
WOS关键词 | DESERT STREAM ; FOREST STREAM ; NITRATE REMOVAL ; DENITRIFICATION ; RETENTION ; TRANSPORT ; TRANSFORMATION ; WATERSHEDS ; DYNAMICS ; QUANTIFICATION |
WOS类目 | Limnology ; Oceanography |
WOS研究方向 | Marine & Freshwater Biology ; Oceanography |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/161891 |
作者单位 | 1.Univ Wyoming, Dept Zool & Physiol, Laramie, WY 82071 USA; 2.Utah State Univ, Dept Biol, Logan, UT 84322 USA; 3.Utah State Univ, Ctr Ecol, Logan, UT 84322 USA; 4.Univ Wyoming, Program Ecol, Laramie, WY 82071 USA |
推荐引用方式 GB/T 7714 | Hall, Robert O., Jr.,Baker, Michelle A.,Arp, Christopher D.,et al. Hydrologic control of nitrogen removal, storage, and export in a mountain stream[J],2009,54(6):2128-2142. |
APA | Hall, Robert O., Jr.,Baker, Michelle A.,Arp, Christopher D.,&Koch, Benjamin J..(2009).Hydrologic control of nitrogen removal, storage, and export in a mountain stream.LIMNOLOGY AND OCEANOGRAPHY,54(6),2128-2142. |
MLA | Hall, Robert O., Jr.,et al."Hydrologic control of nitrogen removal, storage, and export in a mountain stream".LIMNOLOGY AND OCEANOGRAPHY 54.6(2009):2128-2142. |
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