Comparative assessment of nitrogen fixation rate by N-15(2) tracer assays in the South China Sea

CORC > 深海科学与工程研究所 > 中国科学院深海科学与工程研究所 > 深海科学研究部 > 深海生物学研究室 > 海洋微生物分子生态学研究组

	Comparative assessment of nitrogen fixation rate by N-15(2) tracer assays in the South China Sea
	Li, Danyang 2,3; Zheng, Minfang 3; Qiu, Yusheng 3; Lai, Limin 1,4; Chen, Nengwang 1,4; Jing, Hongmei 5; Zhang, Run 3; Chen, Min 3
刊名	ACTA OCEANOLOGICA SINICA
	2023-01
卷号	42 期号:1
关键词	N-2 fixation rate South China Sea N-15(2) tracer assay
ISSN号	1869-1099
文献子类	期刊论文
英文摘要	Nitrogen fixation is one of the most important sources of new nitrogen in the ocean and thus profoundly affects the nitrogen and carbon biogeochemical processes. The distribution, controlling factors, and flux of N-2 fixation in the global ocean remain uncertain, partly because of the lack of methodological uniformity. The N-15(2) tracer assay (the original bubble method -> the N-15(2)-enriched seawater method -> the modified bubble method) is the mainstream method for field measurements of N-2 fixation rates (NFRs), among which the original bubble method is the most frequently used. However, accumulating evidence has suggested an underestimation of NFRs when using this method. To improve the availability of previous data, we compared NFRs measured by three N-15(2) tracer assays in the South China Sea. Our results indicate that the relationship between NFRs measured by the original bubble method and the N-15(2)-enriched seawater method varies obviously with area and season, which may be influenced by incubation time, diazotrophic composition, and environmental factors. In comparison, the relationship between NFRs measured by the original bubble method and the modified bubble method is more stable, indicating that the N-2 fixation rates based on the original bubble methods may be underestimated by approximately 50%. Based on this result, we revised the flux of N-2 fixation in the South China Sea to 40 mmol/(m(2)center dot a). Our results improve the availability and comparability of literature NFR data in the South China Sea. The comparison of the N-15(2) tracer assay for NFRs measurements on a larger scale is urgently necessary over the global ocean for a more robust understanding of the role of N-2 fixation in the marine nitrogen cycle.
WOS研究方向	Oceanography
语种	英语
WOS记录号	WOS:000943505200007
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.idsse.ac.cn/handle/183446/10156]
专题	深海科学研究部_深海生物学研究室_海洋微生物分子生态学研究组
作者单位	1.Xiamen Univ, Coll Environm & Ecol, Xiamen 361102, Peoples R China; 2.Jimei Univ, Fisheries Coll, Xiamen 361021, Peoples R China; 3.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China; 4.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China; 5.Chinese Academy Sci, Inst Deep Sea Sci & Engn, Key Lab Expt Study Deep Sea Extreme Condit, Sanya 572000, Peoples R China
推荐引用方式 GB/T 7714	Li, Danyang,Zheng, Minfang,Qiu, Yusheng,et al. Comparative assessment of nitrogen fixation rate by N-15(2) tracer assays in the South China Sea[J]. ACTA OCEANOLOGICA SINICA,2023,42(1).
APA	Li, Danyang.,Zheng, Minfang.,Qiu, Yusheng.,Lai, Limin.,Chen, Nengwang.,...&Chen, Min.(2023).Comparative assessment of nitrogen fixation rate by N-15(2) tracer assays in the South China Sea.ACTA OCEANOLOGICA SINICA,42(1).
MLA	Li, Danyang,et al."Comparative assessment of nitrogen fixation rate by N-15(2) tracer assays in the South China Sea".ACTA OCEANOLOGICA SINICA 42.1(2023).