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The nitrogen isotopic composition of dissolved nitrate in the Yangtze River (Changjiang) estuary, China

文献类型：期刊论文

作者Liu, Xiujuan1,2; Yu, Zhiming1; Song, Xiuxian1; Cao, Xihua1
刊名ESTUARINE COASTAL AND SHELF SCIENCE
出版日期2009-12-15
卷号85期号:4页码:641-650
ISSN号0272-7714
关键词Nitrogen Isotopes Surface Water Seasonal Variations Biogeochemical Processing Nitrogen Cycle China Shanghai Yangtze River Estuary
DOI10.1016/j.ecss.2009.09.017
文献子类Article
英文摘要The nitrogen isotopic composition of dissolved nitrate (delta(15)N-NO(3)(-)) in surface water of the Yangtze River estuary was determined in four seasons of 2006. delta(15)N-NO(3)(-) ranged from 0.4 parts per thousand to 6.5 parts per thousand and varied with seasons and geographic regions, reflecting the dynamics of nitrogen cycling in the estuarine ecosystem. delta(15)N-NO(3)(-) was markedly lower in February than in other seasons and exhibited conservative mixing, which was probably attributed to the NO(3)(-) being sourced from the atmospheric deposition and agricultural fertilizer. In the upper estuary, the influence of riverine inputs was important during all surveys. in the turbidity maximum zone, nitrification was found with nitrate depleted in (15)N in May, whereas denitrification resulting in heavy delta(15)N-NO(3)(-) played an important role in August. More enriched delta(15)N-NO(3)(-) values coinciding with losses of nitrate concentrations based on the conservative mixing model were found in the adjacent marine area in May, and may reflect obvious phytoplankton assimilation of dissolved nitrate. In this manner, delta(15)N-NO(3)(-) may be a sensitive indicator of nitrogen sources and biogeochemical processing existing in this estuary in conjunction with the variations of dissolved nitrate and other environmental factors. (C) 2009 Elsevier Ltd. All rights reserved.; The nitrogen isotopic composition of dissolved nitrate (delta N-15-NO3-) in surface water of the Yangtze River estuary was determined in four seasons of 2006. delta N-15-NO3- ranged from 0.4 parts per thousand to 6.5 parts per thousand and varied with seasons and geographic regions, reflecting the dynamics of nitrogen cycling in the estuarine ecosystem. delta N-15-NO3- was markedly lower in February than in other seasons and exhibited conservative mixing, which was probably attributed to the NO3- being sourced from the atmospheric deposition and agricultural fertilizer. In the upper estuary, the influence of riverine inputs was important during all surveys. in the turbidity maximum zone, nitrification was found with nitrate depleted in N-15 in May, whereas denitrification resulting in heavy delta N-15-NO3- played an important role in August. More enriched delta N-15-NO3- values coinciding with losses of nitrate concentrations based on the conservative mixing model were found in the adjacent marine area in May, and may reflect obvious phytoplankton assimilation of dissolved nitrate. In this manner, delta N-15-NO3- may be a sensitive indicator of nitrogen sources and biogeochemical processing existing in this estuary in conjunction with the variations of dissolved nitrate and other environmental factors. (C) 2009 Elsevier Ltd. All rights reserved.
学科主题Marine & Freshwater Biology ; Oceanography
URL标识查看原文
语种英语
WOS记录号WOS:000272957600016
公开日期2010-12-22
源URL[http://ir.qdio.ac.cn/handle/337002/2621]  
专题海洋研究所_海洋生态与环境科学重点实验室
海洋研究所_文献信息中心
作者单位1.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
推荐引用方式
GB/T 7714		 Liu, Xiujuan,Yu, Zhiming,Song, Xiuxian,et al. The nitrogen isotopic composition of dissolved nitrate in the Yangtze River (Changjiang) estuary, China[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2009,85(4):641-650.
APA Liu, Xiujuan,Yu, Zhiming,Song, Xiuxian,&Cao, Xihua.(2009).The nitrogen isotopic composition of dissolved nitrate in the Yangtze River (Changjiang) estuary, China.ESTUARINE COASTAL AND SHELF SCIENCE,85(4),641-650.
MLA Liu, Xiujuan,et al."The nitrogen isotopic composition of dissolved nitrate in the Yangtze River (Changjiang) estuary, China".ESTUARINE COASTAL AND SHELF SCIENCE 85.4(2009):641-650.

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来源：海洋研究所

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