DOI: 10.1002/2017GB005677
Scopus记录号: 2-s2.0-85043372980
论文题名: Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks
作者: Marcé R ; , von Schiller D ; , Aguilera R ; , Martí E ; , Bernal S
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2018
卷: 32, 期: 3 起始页码: 376
结束页码: 388
语种: 英语
英文关键词: dissolved inorganic nitrogen
; in-stream nutrient retention
; mean residence time
; nutrient spiraling
; nutrient uptake rates
; soluble reactive phosphorous
英文摘要: In-stream nutrient retention results from the interaction between hydrological and biogeochemical processes involved in downstream transport. While hydrological processes set the opportunity for nutrient retention to occur, metabolic activity and abiotic processes determine the potential biogeochemical reactivity of streams. Yet, a comprehensive assessment of the relevance of hydrological opportunity versus biogeochemical reactivity on the variability of nutrient retention across streams is still missing. We compiled an extensive data set of existing studies on nutrient retention for ammonium, nitrate, and soluble reactive phosphorus to explore how variability in hydrological opportunity and biogeochemical reactivity explain nutrient retention. We quantified the relative contribution of hydrological opportunity and biogeochemical reactivity to the observed variability in stream nutrient retention using a linearization of the retention equation, which allows for an exact partitioning of the variance associated with residence time and nutrient uptake rate. Finally, we explored potential patterns of nutrient retention along the river network resulting from the interaction between hydrological opportunity and biogeochemical reactivity. Our results show that biogeochemical reactivity has a more relevant role on nutrient retention variability than previously thought, explaining over 66% of the variability in nutrient retention. Among the studied nutrients, retention variability of ammonium was the most subjected to biogeochemical reactivity controls. Furthermore, our results provide insights on controls of longitudinal patterns of nutrient retention along river networks, indicating that retention per unit length for the three nutrients will most likely decrease from headwaters to river mouth because of a decrease in water residence time. ©2018. 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/77658
Appears in Collections: 气候变化事实与影响
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作者单位: Catalan Institute for Water Research (ICRA), Girona, Spain; Department of Plant Biology and Ecology, Faculty of Science and Technology, University of the Basque Country (UPV/EHU), Bilbao, Spain; Marine Science Institute, University of California, Santa Barbara, CA, United States; Integrative Freshwater Ecology Group, Centre d'Estudis Avançats de Blanes (CEAB-CSIC), Blanes, Spain; Secció Ecologia, Fac. Biologia, Universitat de Barcelona, Barcelona, Spain
Recommended Citation:
Marcé R,, von Schiller D,, Aguilera R,et al. Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks[J]. Global Biogeochemical Cycles,2018-01-01,32(3)