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Planktic foraminifera-bound organic nitrogen isotopic composition in contemporary water column and sediment trap
Li, Da-Wei; Xiang, Rong2; Wu, Qiao; Kao, Shuh-Ji
2019
Source PublicationDEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS
ISSN0967-0637
Volume143Pages:28
AbstractPlanktic foraminifera-bound organic nitrogen isotopes (FB-delta N-15) archived in sediments provide an opportunity to reveal past changes in marine nitrogen cycling in the upper water column. However, detailed knowledge about living foraminifera FB-delta N-15 is still critically lacking. This study presents the FB-delta N-15 analysis of planktic foraminifera collected from plankton tows and sediment traps in the South China Sea and the Bay of Bengal. Tests of Globigerinoides sacculifer with- and without-sac like chamber from plankton tows showed almost identical FB-delta N-15 values, suggesting that high thermocline delta N-15 is not incorporated into the carbonate tests during gametogenic calcification. Sediment trap samples revealed that species dwelling in the upper euphotic zone, such as Globigerinoides sacculifer, contained slightly depleted FB-delta N-15 relative to the deeper-dwelling species, such as Orbulina universa and Globigerinella siphonifera. The three species also contained FB-delta N-15 similar to delta N-15 of the suspended particulate organic matter at corresponding dwelling depths. Our results confirm the increase in FB-delta N-15 from shallower-dwelling species to deeper-dwelling species and these FB-delta N-15 differences (Delta N-15(vertical)) between shallower- and deeper-dwelling species may shed light on the nitrogen dynamics of the euphotic zone in the South China Sea, which is under the influence of the East Asian winter monsoon.
DepartmentOMG
KeywordSouth China Sea Planktic foraminifera Plankton tow Sediment trap Nitrogen isotope
DOI10.1016/j.dsr.2018.12.003
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Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17985
Collection中科院边缘海地质重点实验室
Affiliation1.Xiamen Univ, State Key Lab Marine Environm Sci, Xiamen 361102, Peoples R China
2.Ocean Univ China, Minist Educ, Key Lab Marine Chem Theory & Technol, Qingdao 266100, Peoples R China
3.Chinese Acad Sci, South China Sea Inst Oceanol, CAS Key Lab Marginal Sea Geol, Guangzhou 510301, Guangdong, Peoples R China
Recommended Citation
GB/T 7714
Li, Da-Wei,Xiang, Rong,Wu, Qiao,et al. Planktic foraminifera-bound organic nitrogen isotopic composition in contemporary water column and sediment trap[J]. DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,2019,143:28, 34.
APA Li, Da-Wei,Xiang, Rong,Wu, Qiao,&Kao, Shuh-Ji.(2019).Planktic foraminifera-bound organic nitrogen isotopic composition in contemporary water column and sediment trap.DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS,143,28.
MLA Li, Da-Wei,et al."Planktic foraminifera-bound organic nitrogen isotopic composition in contemporary water column and sediment trap".DEEP-SEA RESEARCH PART I-OCEANOGRAPHIC RESEARCH PAPERS 143(2019):28.
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