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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.
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| 2014 | |
| 发表期刊 | CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
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| 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 |
| DOI | 10.1007/s00343-014-3102-x |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000332003500019 |
| 引用统计 | |
| 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 |
| 推荐引用方式 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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