气候变化领域集成服务门户(CCPortal): Tracking riverine nitrate sources under changing land use pattern and hydrologic regime

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DOI	10.1016/j.marpolbul.2020.110884
	Tracking riverine nitrate sources under changing land use pattern and hydrologic regime
	Huang Y.; Huang J.; Ervinia A.; Duan S.
发表日期	2020
ISSN	0025326X
卷号	152
英文摘要	It remains challenging to identify nitrate sources in streams due to complications associated with anthropogenic inputs and in-stream biogeochemical processes. We used dual isotopic analysis of nitrate and a Bayesian isotope mixing model to explore the dynamics of nitrate sources and their associated transformations among three types of headwater watershed with different dominant land use types during four seasons in Jiulong River Watershed, a coastal China watershed. Nitrogen sources were the primary determinant of the δ15N-NO3 and seasonal differences in biogeochemical processes exhibited among watersheds. Nitrate was mostly derived from nitrification in spring and summer, whereas atmospheric deposition greatly influenced the isotopic composition in autumn and winter. Chemical fertilizer contributed the largest to the riverine nitrate, accounting for 36.9 ± 12.3%, followed by soil N (27.2 ± 4.4%), atmospheric deposition (23.9 ± 11.8%) and manure & sewage (12.0 ± 5.9%). This study reveals the seasonality of riverine nitrate sources under changing watershed land use patterns. © 2020 Elsevier Ltd
英文关键词	Bayesian isotope mixing model; Nitrate sources; Seasonal; Spatial; Stable isotopes
语种	英语
scopus关键词	Atmospheric chemistry; Biogeochemistry; Deposition; Fertilizers; Isotopes; Land use; Meteorological problems; Mixing; Sewage; Watersheds; Mixing models; Nitrate sources; Seasonal; Spatial; Stable isotopes; Nitrates; delta nitrogen 15; delta oxygen 18; fertilizer; nitrate; nitrogen 15; oxygen 18; unclassified drug; nitric acid derivative; nitrogen; oxygen; Bayesian analysis; hydrological regime; isotopic analysis; nitrate; seasonal variation; source apportionment; spatiotemporal analysis; stable isotope; tracking; Article; atmospheric deposition; autumn; Bayes theorem; biogeochemistry; China; coastal waters; controlled study; isotope analysis; land use; manure; nitrification; seasonal variation; sewage; spring; summer; watershed; environmental monitoring; river; water pollutant; China; Fujian; Jiulong River; Bayes Theorem; China; Environmental Monitoring; Nitrates; Nitrogen Isotopes; Oxygen Isotopes; Rivers; Water Pollutants, Chemical
来源期刊	Marine Pollution Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/149188
作者单位	Fujian Key Laboratory of Coastal Pollution Prevention and Control, Xiamen University, Xiamen, 361102, China; Institute of Oceanography, Minjiang University, Fuzhou, 350108, China; Department of Geology and Earth System Science Interdisciplinary Center, University of MarylandMD 20740, United States
推荐引用方式 GB/T 7714	Huang Y.,Huang J.,Ervinia A.,et al. Tracking riverine nitrate sources under changing land use pattern and hydrologic regime[J],2020,152.
APA	Huang Y.,Huang J.,Ervinia A.,&Duan S..(2020).Tracking riverine nitrate sources under changing land use pattern and hydrologic regime.Marine Pollution Bulletin,152.
MLA	Huang Y.,et al."Tracking riverine nitrate sources under changing land use pattern and hydrologic regime".Marine Pollution Bulletin 152(2020).