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Key nitrogen biogeochemical processes revealed by the nitrogen isotopic composition of dissolved nitrate in the Changjiang River estuary, China
Yu Haiyan1,2; Yu Zhiming1; Song Xiuxian1; Cao Xihua1; Yuan Yongquan1; Lu Guangyuan1; Liu Lili1; Yu, ZM (reprint author), Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
2014
发表期刊CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
卷号32期号:1页码:162-173
文章类型Article
摘要Seasonal variations in the nitrogen isotopic composition of dissolved nitrate (delta(NO3)-N-15) were investigated in the surface waters of the Changjiang River estuary in 2009 and 2010. delta(NO3)-N-15 varied between -4.6aEuro degrees and 8.9aEuro degrees with changes in temperature, salinity, dissolved oxygen concentrations, and the composition of the dissolved inorganic nitrogen pool. In February, biological processes decreased because of low temperature, and the mean delta(NO3)-N-15 near the river mouth was 2.4aEuro degrees. In May, delta(NO3)-N-15 was the highest in the surface waters among all seasons. Analysis on the conservative mixing revealed assimilation, and this finding is supported by positive relationship between Chl a and delta(NO3)-N-15. The fractionation factor of assimilation was estimated to be 2.0aEuro degrees by the Rayleigh equation. Nitrification was supported based on the mixing behaviors in November 2010 and the low delta(NO3)-N-15 values in May and November 2009. The high ammonium concentrations in the adjacent marine area and positive relationships between total organic nitrogen and delta(NO3)-N-15 in November 2010 indicated that mineralization was taking place.
关键词Assimilation Nitrification Mineralization Eutrophication
学科领域Marine & Freshwater Biology ; Oceanography
DOI10.1007/s00343-014-3102-x
收录类别SCI
语种英语
WOS记录号WOS:000332003500019
引用统计
被引频次:8[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.qdio.ac.cn/handle/337002/24023
专题海洋生态与环境科学重点实验室
通讯作者Yu, ZM (reprint author), Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Peoples R China.
作者单位1.Chinese Acad Sci, Key Lab Marine Ecol & Environm Sci, Inst Oceanol, Qingdao 266071, Peoples R China
2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
第一作者单位中国科学院海洋研究所
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GB/T 7714
Yu Haiyan,Yu Zhiming,Song Xiuxian,et al. Key nitrogen biogeochemical processes revealed by the nitrogen isotopic composition of dissolved nitrate in the Changjiang River estuary, China[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2014,32(1):162-173.
APA Yu Haiyan.,Yu Zhiming.,Song Xiuxian.,Cao Xihua.,Yuan Yongquan.,...&Yu, ZM .(2014).Key nitrogen biogeochemical processes revealed by the nitrogen isotopic composition of dissolved nitrate in the Changjiang River estuary, China.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,32(1),162-173.
MLA Yu Haiyan,et al."Key nitrogen biogeochemical processes revealed by the nitrogen isotopic composition of dissolved nitrate in the Changjiang River estuary, China".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 32.1(2014):162-173.
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