Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary

doi:10.1016/j.ecss.2018.12.001

IOCAS-IR

	Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary
	Guo, Shujin 1,2,3; Sun, Jun 1,2; Wang, Yu 4
	2019-03-05
发表期刊	ESTUARINE COASTAL AND SHELF SCIENCE
ISSN	0272-7714
卷号	218 页码:163-172
通讯作者	Sun, Jun(phytoplankton@163.com)
摘要	Copepods fecal pellets (FPs) are important contributors to carbon export in the ocean, but their role in the carbon export is poorly understood in the eutrophic coastal sea, where copepods biomass is always high. Two cruises were carried out in one of the most eutrophic coastal seas in the world - the Changjiang (Yangtze River) estuary during spring and summer in 2011, and copepods fecal pellets carbon (FPC) concentration, their production rates and sinking rates were measured, and a potential export flux of copepods FPs was also calculated. The copepods FPC concentration ranged from 0.21 to 1.25 mg C m(-3) (mean = 0.58 +/- 0.24 mg C m(-3)) in spring and 0.46-1.53 mg C m(-3) (mean = 0.76 +/- 0.25 mg C m(-3)) in summer, which was significantly lower than that of phytoplankton cells, indicating that copepods FPs only accounted for a minor part of the POC pool in this area. Production rates of copepods FPs fell in the range of the reported values, and the high values always appeared at stations with high phytoplankton biomass. Sinking rates of copepods FPs determined in the lab ranged from 17.82 to 223.30 m d(-1) (mean = 73.46 +/- 47.56 m d(-1)) in spring and 34.62-262.33 m d(-1) (mean = 92.81 +/- 56.80 m d(-1)) in summer, and they were significantly positive correlated with the FPs volume. The density of copepods FPs was also calculated with the determined sinking rate, and it was higher in summer than that in spring due to the variation of phytoplankton diets from spring to summer. The potential copepods FPs export flux ranged from 17.72 to 60.20 mg C m(-2) d(-1) (mean = 37.13 +/- 16.21 mg C m(-2) d(-1)) in spring and 23.80-166.10 mg C m(-2) d(-1) (mean = 79.44 +/- 48.86 mg C m(-2) d(-1)) in summer, and it was at a comparable level with the export flux of phytoplankton cells during both cruises. This study indicated that copepods FPs comprised a substantial fraction of exported carbon in the Changjiang (Yangtze River) estuary, and they should be taken into account when we study the biological pump in other eutrophic coastal seas around the world.
关键词	Fecal pellets Copepods Production rates Sinking rates Carbon export Changjiang (Yangtze River) estuary
DOI	10.1016/j.ecss.2018.12.001
收录类别	SCI
语种	英语
资助项目	Changjiang Scholar Program of Chinese Ministry of Education ; National Natural Science Foundation of China[41276124] ; National Natural Science Foundation of China[31700425] ; National Natural Science Foundation of China[41676112] ; National Natural Science Foundation of China[91751202] ; National Natural Science Foundation of China[41876134] ; National Key R&D Program of China[2011CB409804] ; National Key R&D Program of China[2015CB954002] ; National Key R&D Program of China[2015CB954002] ; National Key R&D Program of China[2011CB409804] ; National Natural Science Foundation of China[41876134] ; National Natural Science Foundation of China[91751202] ; National Natural Science Foundation of China[41676112] ; National Natural Science Foundation of China[31700425] ; National Natural Science Foundation of China[41276124] ; Changjiang Scholar Program of Chinese Ministry of Education
WOS研究方向	Marine & Freshwater Biology ; Oceanography
WOS类目	Marine & Freshwater Biology ; Oceanography
WOS记录号	WOS:000459519700016
出版者	ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
WOS关键词	PARTICULATE ORGANIC-CARBON ; MARGINAL ICE-ZONE ; VERTICAL FLUX ; SINKING RATES ; PHYTOPLANKTON BLOOM ; COMMUNITY STRUCTURE ; SEASONAL-VARIATION ; PERMANENT STATION ; NATURAL COPEPOD ; NORWEGIAN SEA
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/155484
通讯作者	Sun, Jun
作者单位	1.Tianjin Univ Sci & Technol, Coll Marine & Environm Sci, Tianjin 300457, Peoples R China 2.Tianjin Univ Sci & Technol, Tianjin Key Lab Marine Resources & Chem, Tianjin 300457, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Natl Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China 4.Tianjin Bohai Sea Fishery Res Inst, Fishery Resources & Ecol Environm Res Dept, Tianjin 300270, Peoples R China
推荐引用方式 GB/T 7714	Guo, Shujin,Sun, Jun,Wang, Yu. Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary[J]. ESTUARINE COASTAL AND SHELF SCIENCE,2019,218:163-172.
APA	Guo, Shujin,Sun, Jun,&Wang, Yu.(2019).Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary.ESTUARINE COASTAL AND SHELF SCIENCE,218,163-172.
MLA	Guo, Shujin,et al."Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary".ESTUARINE COASTAL AND SHELF SCIENCE 218(2019):163-172.