Arid
DOI10.1002/2015GB005154
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
ISSN0886-6236
EISSN1944-9224
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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