Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary

doi:10.1007/s13131-020-1660-7

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	Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary
	Guo, Shujin 1,2; Sun, Jun 3
刊名	ACTA OCEANOLOGICA SINICA
	2020-10-01
卷号	39 期号:10 页码:58-69
关键词	transparent exopolymer particles sinking rates Chang’ iang River (Yangtze River) Estuary coastal sea
ISSN号	0253-505X
DOI	10.1007/s13131-020-1660-7
通讯作者	Sun, Jun(phytoplankton@163.com)
英文摘要	Transparent exopolymer particles (TEPs) are ubiquitous throughout the oceans, and their sedimentation is considered an efficient biological carbon sink pathway. To investigate the role of coastal TEPs in sinking carbon from the upper layer, samples were collected in the spring and summer of 2011 in the Changjiang River (Yangtze River) Estuary, a typical coastal water. The concentrations and sinking rates of TEPs were measured, and potential sedimentation flux of TEPs was estimated. TEPs concentrations ranged from 40.00 mu g/L to 1 040.00 mu g/L (mean=(209.70 +/- 240.93) mu g/L) in spring and 56.67 mu g/L to 1 423.33 mu g/L (mean=(433.33 +/- 393.02) mu g/L) in summer, and they were higher at bloom stations than at non-bloom stations during both cruises. A significant positive correlation between TEPs concentration and chlorophyll a (Chl a) concentration was detected, suggesting that phytoplankton was the primary source of TEPs in this area. TEPs sinking rates ranged from 0.08 m/d to 0.57 m/d with a mean of (0.28 +/- 0.14) m/d in spring and 0.10 m/d to 1.08 m/d with a mean of (0.34 +/- 0.31) m/d in summer. The potential sedimentation flux of TEP-C ranged from 4.95 mg/(m(2)center dot d) to 29.40 mg/(m(2)center dot d) with a mean of (14.66 +/- 8.83) mg/(m(2)center dot d) in spring and 6.80 mg/(m(2)center dot d) to 30.45 mg/(m(2)center dot d) with a mean of (15.71 +/- 8.73) mg/(m(2)center dot d) in summer, which was similar to 17.81% to 138.27% (mean=65.15%+/- 31.75%) of sedimentation flux of phytoplankton cells in the study area. Due to the increase of TEPs concentrations and their sinking rates, sedimentation fluxes of TEPs at the bloom station were obviously higher than at the non-bloom station during both cruises. This study indicates that TEPs serve as a carbon sink in the Changjiang River Estuary, especially during bloom events, and their sedimentation should be taken into account when we study the carbon sedimentation in the coastal sea.
WOS研究方向	Oceanography
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000588707900007
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/169102]
专题	海洋研究所_胶州湾海洋生态系统国家野外研究站
通讯作者	Sun, Jun
作者单位	1.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Ctr Ocean Megasci, Qingdao 266071, Peoples R China 3.China Univ Geosci Wuhan, Coll Marine Sci & Technol, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Guo, Shujin,Sun, Jun. Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary[J]. ACTA OCEANOLOGICA SINICA,2020,39(10):58-69.
APA	Guo, Shujin,&Sun, Jun.(2020).Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary.ACTA OCEANOLOGICA SINICA,39(10),58-69.
MLA	Guo, Shujin,et al."Concentrations and sinking rates of transparent exopolymer particles (TEPs) in a coastal sea: the Changjiang River (Yangtze River) Estuary".ACTA OCEANOLOGICA SINICA 39.10(2020):58-69.