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

IOCAS-IR

	Carbon biomass,production rates and export flux of copepods fecal pellets in the Changjiang(Yangtze) River estuary
	Guo SJ(郭术津); Sun XX(孙晓霞)
发表期刊	Journal of Oceanology and Limnology
ISSN	2096-5508
	2018-07-15
出版年	2018
卷号	v.36 期号:04 页码:218-228
文献类型	CNKI期刊论文
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	fecal pellets copepods production rates carbon export Changjiang(Yangtze) River estuary
CNKI专辑号	A;B;
CNKI专辑名称	基础科学;工程科技Ⅰ辑;
CNKI专题号	B027;
CNKI专题名称	环境科学与资源利用;
分类号	X52
收录类别	中科院核心 ; 中科院扩展
语种	英文;
资助项目(基金）	Supported by the Innovation Plan of Science and Technology for Ao Shan(No.2016ASKJ02) ; the National Basic Research Program of China(973 Program)(No.2014CB441504) ; the “Strategic Priority Research Program-Western Pacific Ocean System” of Chinese Academy of Sciences(No.XDA11030204) ; the National Natural Science Foundation of China(No.31700425)
文献类型	CNKI期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/188879
专题	中国科学院海洋研究所
作者单位	1.JiaozhouBayMarineEcosystemResearchStation,ChineseAcademyofSciences 2.LaboratoryforMarineEcologyandEnvironmentalScience,QingdaoNationalLaboratoryforMarineScienceandTechnology 3.UniversityofChineseAcademyofSciences
推荐引用方式 GB/T 7714	Guo SJ,Sun XX. Carbon biomass,production rates and export flux of copepods fecal pellets in the Changjiang(Yangtze) River estuary. 2018.