DOI: 10.1002/2016GB005468
Scopus记录号: 2-s2.0-84981302894
论文题名: Nitrate uptake across biomes and the influence of elemental stoichiometry: A new look at LINX II
作者: Wymore A ; S ; , Coble A ; A ; , Rodríguez-Cardona B ; , McDowell W ; H
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2016
卷: 30, 期: 8 起始页码: 1183
结束页码: 1191
语种: 英语
英文关键词: elemental ratios
; LINX II
; nitrate
; nutrient additions
; stream ecosystems
Scopus关键词: biogeochemical cycle
; biome
; chemical element
; dissolved load
; dissolved organic carbon
; environmental fate
; experimental study
; lotic environment
; multivariate analysis
; nitrate
; nutrient dynamics
; nutrient uptake
; stoichiometry
; water quality
; watershed
; North America
英文摘要: Considering recent increases in anthropogenic N loading, it is essential to identify the controls on N removal and retention in aquatic ecosystems because the fate of N has consequences for water quality in streams and downstream ecosystems. Biological uptake of nitrate (NO3 −) is a major pathway by which N is removed from these ecosystems. Here we used data from the second Lotic Intersite Nitrogen eXperiment (LINX II) in a multivariate analysis to identify the primary drivers of variation in NO3 − uptake velocity among biomes. Across 69 study watersheds in North America, dissolved organic carbon:NO3 − ratios and photosynthetically active radiation were identified as the two most important predictor variables in explaining NO3 − uptake velocity. However, within a specific biome the predictor variables of NO3 − uptake velocity varied and included various physical, chemical, and biological attributes. Our analysis demonstrates the broad control of elemental stoichiometry on NO3 − uptake velocity as well as the importance of biome-specific predictors. Understanding this spatial variation has important implications for biome-specific watershed management and the downstream export of NO3 −, as well as for development of spatially explicit global models that describe N dynamics in streams and rivers. ©2016. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77827
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Natural Resources and the Environment, University of New Hampshire, Durham, NH, United States
Recommended Citation:
Wymore A,S,, Coble A,et al. Nitrate uptake across biomes and the influence of elemental stoichiometry: A new look at LINX II[J]. Global Biogeochemical Cycles,2016-01-01,30(8)