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DOI | 10.1111/jawr.12194 |
LINKING LANDSCAPE CHARACTERISTICS AND HIGH STREAM NITROGEN IN THE OREGON COAST RANGE: RED ALDER COMPLICATES USE OF NUTRIENT CRITERIA | |
Greathouse, Effie A.; Compton, Jana E.; Van Sickle, John | |
发表日期 | 2014-12-01 |
ISSN | 1093-474X |
卷号 | 50期号:6页码:1383-1400 |
英文摘要 | Red alder (Alnus rubra), a nitrogen(N)-fixing deciduous broadleaf tree, can strongly influence N concentrations in western Oregon and Washington. We compiled a database of stream N and GIS-derived landscape characteristics in order to examine geographic variation in N across the Oregon Coast Range. Basal area of alder, expressed as a percent of watershed area, accounted for 37% and 38% of the variation in summer nitrate and total N (TN) concentrations, respectively. Relationships between alder and nitrate were strongest in winter when streamflow and landscape connections are highest. Distance to the coast and latitude, potential surrogates for sea salt inputs, and watershed area were also related to nitrate concentrations in an all-subsets regression analysis, which accounted for 46% of the variation in summer nitrate concentrations. The model with the lowest Akaike's Information Criterion did not include developed or agricultural land cover, probably because few watersheds in our database had substantial levels of these land cover classes. Our results provide evidence, at a regional scale, that background sources and processes cause many Coast Range streams to exceed proposed nutrient criteria, and that the prevalence of a single tree species (N-fixing red alder) exerts a dominant control over stream N concentrations across this region. |
英文关键词 | Pacific Northwest;biogeochemistry;nutrients;rivers;streams;forests;environmental regulations |
语种 | 英语 |
WOS记录号 | WOS:000345773900002 |
来源期刊 | JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION
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来源机构 | 美国环保署 |
文献类型 | 期刊论文 |
条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/57403 |
作者单位 | US EPA, Natl Hlth & Environm Effects Lab, Western Ecol Div, Corvallis, OR 97333 USA |
推荐引用方式 GB/T 7714 | Greathouse, Effie A.,Compton, Jana E.,Van Sickle, John. LINKING LANDSCAPE CHARACTERISTICS AND HIGH STREAM NITROGEN IN THE OREGON COAST RANGE: RED ALDER COMPLICATES USE OF NUTRIENT CRITERIA[J]. 美国环保署,2014,50(6):1383-1400. |
APA | Greathouse, Effie A.,Compton, Jana E.,&Van Sickle, John.(2014).LINKING LANDSCAPE CHARACTERISTICS AND HIGH STREAM NITROGEN IN THE OREGON COAST RANGE: RED ALDER COMPLICATES USE OF NUTRIENT CRITERIA.JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION,50(6),1383-1400. |
MLA | Greathouse, Effie A.,et al."LINKING LANDSCAPE CHARACTERISTICS AND HIGH STREAM NITROGEN IN THE OREGON COAST RANGE: RED ALDER COMPLICATES USE OF NUTRIENT CRITERIA".JOURNAL OF THE AMERICAN WATER RESOURCES ASSOCIATION 50.6(2014):1383-1400. |
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