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N-2 fixation impacted by carbon fixation via dissolved organic carbon in the changing Daya Bay, South China Sea
Li, Danyang; Liu, Jiaxing1; Zhang, Run; Chen, Min; Yang, Weifeng2; Li, Junjie; Fang, Ziming; Wang, Bo; Qiu, Yusheng; Zheng, Minfang
2019
Source PublicationSCIENCE OF THE TOTAL ENVIRONMENT
ISSN0048-9697
Volume674Pages:592
AbstractWe present the first concurrent measurements of N-2 fixation rates (N-15(2) uptake), primary production (C-14 uptake), dissolved organic carbon (DOC) concentrations, and diazotrophic community composition derived from nitrogenase (nifH) abundance in the subtropical Daya Bay (DB) of the coastal northern South China Sea (NSCS) from 2015 to 2017. N-2 fixation rates ranged from n.d. -4.51 nmol N L-1 h(-1). Such values were generally higher than those reported in the neighbouring NSCS open waters and several well-studied oligotrophic waters, thereby suggesting that N-replete conditions do not prevent N-2 fixation in coastal waters. N-2 fixation rates were positively and significantly correlated with the primary production and the concentration of DOC in DB in the spring and summer. Combined with other lines of evidence, we suggest that N-2 fixation may be facilitated by non-diazotrophic phytoplankton via a probable regulation of the quantity and quality (bioavailability) of DOC in DB. Since DB represents a suitable site that has experienced dramatic human-induced changes in environmental conditions, our results likely provide insights in understanding how N-2 fixation and relevant biogeochemical processes may respond to intensified global anthropogenic forcing in similar coastal settings. (C) 2019 Elsevier B.V. All rights reserved.
DepartmentLMB
KeywordN-2 fixation Daya Bay Northern South China Sea Carbon fixation Dissolved organic carbon (DOC) Heterotrophic diazotrophs
DOI10.1016/j.scitotenv.2019.04.176
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17809
Collection中科院海洋生物资源可持续利用重点实验室
Affiliation1.Xiamen Univ, Coll Ocean & Earth Sci, Xiamen 361102, Peoples R China
2.Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, 164 West Xingang Rd, Guangzhou 510301, Guangdong, Peoples R China
3.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China
Recommended Citation
GB/T 7714
Li, Danyang,Liu, Jiaxing,Zhang, Run,et al. N-2 fixation impacted by carbon fixation via dissolved organic carbon in the changing Daya Bay, South China Sea[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2019,674:592, 602.
APA Li, Danyang.,Liu, Jiaxing.,Zhang, Run.,Chen, Min.,Yang, Weifeng.,...&Zheng, Minfang.(2019).N-2 fixation impacted by carbon fixation via dissolved organic carbon in the changing Daya Bay, South China Sea.SCIENCE OF THE TOTAL ENVIRONMENT,674,592.
MLA Li, Danyang,et al."N-2 fixation impacted by carbon fixation via dissolved organic carbon in the changing Daya Bay, South China Sea".SCIENCE OF THE TOTAL ENVIRONMENT 674(2019):592.
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