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Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary
Guo Shujin1; Sun Xiaoxia1,2,3
Corresponding AuthorSun Xiaoxia(
AbstractCopepod fecal pellets are ubiquitous throughout the oceans. Their production and export can represent a highly efficient pathway of carbon export. However, the role these fecal pellets play in carbon export in the Changjiang (Yangtze) River estuary is not well known. Two cruises were carried out in the Changjiang estuary in the spring and summer of 2013, during which time carbon biomass, production, and export of copepod fecal pellets were studied. Spring and summer fecal pellet carbon biomass ranged 0.30-1.01 mg C/m(3) (mean=0.56 +/- 0.20 mg C/m(3)) and 0.31-1.18 mg C/m(3) (mean=0.64 +/- 0.24 mg C/m(3)), respectively, significantly lower than phytoplankton. At most stations, fecal pellet carbon biomass was higher in surface or subsurface layers than deeper layers. Production rates ranged 0.65-1.49 pellets/(ind.(.)h) (mean=1.02 +/- 0.27 pellets/(ind.(.)h)) in spring and 0.62-1.34 pellets/(ind.(.)h) (mean=0.98 +/- 0.22 pellets/(ind.(.)h)) in summer, within the range reported in previous studies. Higher production rates of fecal pellets occurred at stations with higher chlorophyll a concentrations, and production rates of copepods of size 500-1 000 mu m greater than copepods > 1 000 mu m during both cruises. The potential export flux of fecal pellets was slightly higher in summer (mean=68.95 +/- 14.37 mg C/(m(2).d)) than spring (mean=52.08 +/- 11.33 mg C/(m(2).d)) owing to higher summer copepod abundances. To our knowledge, this study is the first of its kind in the Changjiang estuary, and it confirms the significant role of copepod fecal pellets in local carbon export.
Keywordfecal pellets copepods production rates carbon export Changjiang (Yangtze) River estuary
Indexed BySCI
Funding ProjectInnovation Plan of Science and Technology for AoShan[2016ASKJ02] ; National Basic Research Program of China (973 Program)[2014CB441504] ; Strategic Priority Research Program-Western Pacific Ocean System of Chinese Academy of Sciences[XDA11030204] ; National Natural Science Foundation of China[31700425]
WOS Research AreaMarine & Freshwater Biology ; Oceanography
WOS SubjectLimnology ; Oceanography
WOS IDWOS:000441231100020
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorSun Xiaoxia
Affiliation1.Chinese Acad Sci, Jiaozhou Bay Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China
2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Guo Shujin,Sun Xiaoxia. Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary[J]. JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2018,36(4):1244-1254.
APA Guo Shujin,&Sun Xiaoxia.(2018).Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary.JOURNAL OF OCEANOLOGY AND LIMNOLOGY,36(4),1244-1254.
MLA Guo Shujin,et al."Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary".JOURNAL OF OCEANOLOGY AND LIMNOLOGY 36.4(2018):1244-1254.
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