Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/2015GB005154 |
Combined impact of catchment size, land cover, and precipitation on streamflow and total dissolved nitrogen: A global comparative analysis | |
Gallo, Erika L.1,2; Meixner, Thomas2; Aoubid, Hadi2; Lohse, Kathleen A.1; Brooks, Paul D.2,3 | |
通讯作者 | Gallo, Erika L. |
来源期刊 | GLOBAL BIOGEOCHEMICAL CYCLES
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ISSN | 0886-6236 |
EISSN | 1944-9224 |
出版年 | 2015 |
卷号 | 29期号:7页码:1109-1121 |
英文摘要 | Nitrogen (N) loading is a global stressor to fresh and salt water systems with cascading effects on ecosystem processes. However, it is unclear if generalized global response patterns exist between discharge and N sourcing and retention with respect to land cover and precipitation. Using data compiled from 78 catchments from across the world, we identified how discharge and total dissolved nitrogen (TDN) vary with precipitation and land cover and how TDN yields deviate from a generalized global response pattern. Area-weighted discharge regressions indicate that catchment size and the absence of vegetation largely control hydrologic responses. TDN concentrations and yields varied significantly (P<0.05) with some land cover types, but these were overall poor TDN predictors (r(2)<0.26). In 42 of 78 catchments, TDN concentrations varied independently (P>0.05) of discharge, suggesting that these sites are less sensitive to shifts in discharge associated with global climate change, but are more sensitive to shifts in hydrologic partitioning in response to land cover change. Clustering based on precipitation and stepwise multiple linear regression analyses show a shift in TDN responses from physical transport controls on TDN sourcing at the most arid and water limited sites to climate and biologically mediated controls on TDN retention at the wetter sites. Combined, these results indicate that terrestrial systems may have differential response to changes in precipitation based on existing land use and that the impact of land use change on N fate and transport occurs within the context of climate conditions. |
英文关键词 | total dissolved nitrogen nitrogen yield land cover global discharge |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000359810400012 |
WOS关键词 | DRINKING-WATER NITRATE ; FORESTED CATCHMENTS ; HYDROLOGIC RESPONSE ; ORGANIC NITROGEN ; SURFACE WATERS ; NUTRIENT LOADS ; OVERLAND-FLOW ; RIVER DELTA ; EXPORT ; PHOSPHORUS |
WOS类目 | Environmental Sciences ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Meteorology & Atmospheric Sciences |
来源机构 | University of Arizona |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/187584 |
作者单位 | 1.Idaho State Univ, Dept Biol Sci, Pocatello, ID 83209 USA; 2.Univ Arizona, Dept Hydrol & Water Resources, Tucson, AZ 85721 USA; 3.Univ Utah, Dept Geol & Geophys, Salt Lake City, UT 84112 USA |
推荐引用方式 GB/T 7714 | Gallo, Erika L.,Meixner, Thomas,Aoubid, Hadi,et al. Combined impact of catchment size, land cover, and precipitation on streamflow and total dissolved nitrogen: A global comparative analysis[J]. University of Arizona,2015,29(7):1109-1121. |
APA | Gallo, Erika L.,Meixner, Thomas,Aoubid, Hadi,Lohse, Kathleen A.,&Brooks, Paul D..(2015).Combined impact of catchment size, land cover, and precipitation on streamflow and total dissolved nitrogen: A global comparative analysis.GLOBAL BIOGEOCHEMICAL CYCLES,29(7),1109-1121. |
MLA | Gallo, Erika L.,et al."Combined impact of catchment size, land cover, and precipitation on streamflow and total dissolved nitrogen: A global comparative analysis".GLOBAL BIOGEOCHEMICAL CYCLES 29.7(2015):1109-1121. |
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