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Nitrogen fixation driven by mesoscale eddies and the Kuroshio Current in the northern South China Sea and the East China Sea
Li, Liuyang1,2; Wu, Chao2; Sun, Jun2,3; Song, Shuqun4; Ding, Changling2,5; Huang, Danyue1,2; Pujari, Laxman2,6
2020-12-01
Source PublicationACTA OCEANOLOGICA SINICA
ISSN0253-505X
Volume39Issue:12Pages:30-41
Corresponding AuthorSun, Jun(phytoplankton@163.com)
AbstractN-2 fixation rates (NFR, in terms of N) in the northern South China Sea (nSCS) and the East China Sea (ECS) were measured using the acetylene reduction assay in summer and winter, 2009. NFR of the surface water ranged from 1.14 nmol/(L center dot d) to 10.40 nmol/(L center dot d) (average at (4.89 +/- 3.46) nmol/(L center dot d), n=11) in summer and 0.74 nmol/(L center dot d) to 29.45 nmol/(L center dot d) (average at (7.81 +/- 8.50) nmol/(L center dot d), n=15) in winter. Significant spatio-temporal heterogeneity emerged in our study: the anticyclonic eddies (AE) (P<0.01) and the Kuroshio Current (KC) (P<0.05) performed significantly higher NFR than that in the cyclonic eddies or no-eddy area (CEONE), indicating NFR was profoundly influenced by the physical process of the Kuroshio and mesoscale eddies. The depth-integrated N-2 fixation rates (INF, in terms of N) ranged from 52.4 mu mol/(m(2)center dot d) to 905.2 mu mol/(m(2)center dot d) (average at (428.9 +/- 305.5) mu mol/(m(2)center dot d), n=15) in the winter. The contribution of surface NFR to primary production (PP) ranged from 1.7% to 18.5% in the summer, and the mean contribution of INF to new primary production (NPP) in the nSCS and ECS were estimated to be 11.0% and 36.7% in the winter. The contribution of INF to NPP (3.0%-93.9%) also decreased from oligotrophic sea toward the eutrophic waters affected by runoffs or the CEONE. Furthermore, we observed higher contributions compared to previous studies, revealing the vital roles of nitrogen fixation in sustaining the carbon pump of the nSCS and ECS.
Keywordnitrogen fixation primary production anticyclonic eddies Kuroshio acetylene reduction assay
DOI10.1007/s13131-020-1691-0
Indexed BySCI
Language英语
WOS Research AreaOceanography
WOS SubjectOceanography
WOS IDWOS:000614054900004
PublisherSPRINGER
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Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/170055
Collection中国科学院海洋研究所
Corresponding AuthorSun, Jun
Affiliation1.Shanghai Jiao Tong Univ, Sch Life Sci & Biotechnol, Shanghai 200240, Peoples R China
2.Tianjin Univ Sci & Technol, Res Ctr Indian Ocean Ecosyst, Tianjin 300457, Peoples R China
3.China Univ Geosci Wuhan, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
4.Chinese Acad Sci, Inst Oceanol, Qingdao 266071, Peoples R China
5.Tianjin Univ Sci & Technol, Coll Biotechnol, Tianjin 300457, Peoples R China
6.Tianjin Univ Sci & Technol, Coll Food Engn & Biotechnol, Tianjin 300457, Peoples R China
Recommended Citation
GB/T 7714
Li, Liuyang,Wu, Chao,Sun, Jun,et al. Nitrogen fixation driven by mesoscale eddies and the Kuroshio Current in the northern South China Sea and the East China Sea[J]. ACTA OCEANOLOGICA SINICA,2020,39(12):30-41.
APA Li, Liuyang.,Wu, Chao.,Sun, Jun.,Song, Shuqun.,Ding, Changling.,...&Pujari, Laxman.(2020).Nitrogen fixation driven by mesoscale eddies and the Kuroshio Current in the northern South China Sea and the East China Sea.ACTA OCEANOLOGICA SINICA,39(12),30-41.
MLA Li, Liuyang,et al."Nitrogen fixation driven by mesoscale eddies and the Kuroshio Current in the northern South China Sea and the East China Sea".ACTA OCEANOLOGICA SINICA 39.12(2020):30-41.
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