Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary

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	Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary
其他题名	Carbon biomass, production rates and export flux of copepods fecal pellets in the Changjiang (Yangtze) River estuary
	Guo Shujin 1; Sun Xiaoxia 1
	2018-01-01
发表期刊	JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN	2096-5508
卷号	36 期号:4 页码:1244-1254
摘要	Copepod 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.
其他摘要	Copepod 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 μm greater than copepods >1 000 μm 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.
关键词	PARTICULATE ORGANIC-CARBON NORTHERN BARENTS SEA MARGINAL ICE-ZONE VERTICAL FLUX PHYTOPLANKTON BLOOM SINKING VELOCITIES SEASONAL-VARIATION PERMANENT STATION NORWEGIAN SEA MARINE SNOW fecal pellets copepods production rates carbon export Changjiang (Yangtze) River estuary
收录类别	CSCD
语种	英语
资助项目	[Innovation Plan of Science and Technology for AoShan] ; [National Basic Research Program of China (973 Program)] ; ["Strategic Priority Research Program-Western Pacific Ocean System" of Chinese Academy of Sciences] ; [National Natural Science Foundation of China]
CSCD记录号	CSCD:6315917
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/172168
作者单位	1.中国科学院海洋研究所 2.黑龙江省环境保护科学研究院 3.中国科学院大学
推荐引用方式 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.