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Production and export of copepods fecal pellets in an eutrophic coastal sea: The Changjiang (Yangtze River) estuary
Guo, Shujin1,2,3; Sun, Jun1,2; Wang, Yu4
2019-03-05
Source PublicationESTUARINE COASTAL AND SHELF SCIENCE
ISSN0272-7714
Volume218Pages:163-172
Corresponding AuthorSun, Jun(phytoplankton@163.com)
AbstractCopepods 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.
KeywordFecal pellets Copepods Production rates Sinking rates Carbon export Changjiang (Yangtze River) estuary
DOI10.1016/j.ecss.2018.12.001
Indexed BySCI
Language英语
Funding ProjectNational 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 Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectMarine & Freshwater Biology ; Oceanography
WOS IDWOS:000459519700016
PublisherACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
Citation statistics
Document Type期刊论文
Identifierhttp://ir.qdio.ac.cn/handle/337002/155486
Collection胶州湾海洋生态系统国家野外研究站
Corresponding AuthorSun, Jun
Affiliation1.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
First Author AffilicationInstitute of Oceanology, Chinese Academy of Sciences
Recommended Citation
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.
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