气候变化领域集成服务门户(CCPortal): Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks

CCPortal

DOI	10.1002/2017GB005677
	Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks
	Marcé R.; von Schiller D.; Aguilera R.; Martí E.; Bernal S.
发表日期	2018
ISSN	0886-6236
EISSN	1944-9224
起始页码	376
结束页码	388
卷号	32 期号:3
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.
英文关键词	dissolved inorganic nitrogen; in-stream nutrient retention; mean residence time; nutrient spiraling; nutrient uptake rates; soluble reactive phosphorous
语种	英语
scopus关键词	biogeochemical cycle; dissolved inorganic nitrogen; hydrological cycle; metabolism; nutrient uptake; phosphorus; residence time; river system; solubility
来源期刊	Global Biogeochemical Cycles
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/129853
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
推荐引用方式 GB/T 7714	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],2018,32(3).
APA	Marcé R.,von Schiller D.,Aguilera R.,Martí E.,&Bernal S..(2018).Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks.Global Biogeochemical Cycles,32(3).
MLA	Marcé R.,et al."Contribution of Hydrologic Opportunity and Biogeochemical Reactivity to the Variability of Nutrient Retention in River Networks".Global Biogeochemical Cycles 32.3(2018).