Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer

doi:10.1016/j.dsr2.2022.105051

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	Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer
	Yang, Guang 1,5,6; Mou, Wenxiu 5,6,7; Chen, Xiaoli 5,6,7; Xu, Zhiqiang 2; Wang, Yanqing 3; Li, Chaolun 1,4,5,6,7
刊名	DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY
	2022-04-01
卷号	198 页码:7
关键词	Zooplankton Carcasses Particulate organic carbon Mesopelagic zone Cosmonaut sea Southern ocean
ISSN号	0967-0645
DOI	10.1016/j.dsr2.2022.105051
通讯作者	Li, Chaolun(lcl@qdio.ac.cn)
英文摘要	Zooplankton carcasses and their contribution to carbon export are increasingly garnering attention in food web studies of polar oceans. We investigated the occurrence of carcasses of dominant copepod species at four depths (100-200 m, 200-500 m, 500-1000 m, 1000-1500 m) and their potential contribution to particulate organic carbon (POC) concentrations in the Cosmonaut Sea, Antarctica, during summer, 2019/2020. The abundance of small copepods (< 2 mm), either live or dead individuals, was 1-3 orders of magnitude higher than the four dominant large copepod species Calanoides acutus, Calanus propinquus, Metridia gerlachei and Rhincalanus gigas at each depth. Most carcasses were observed at the surface (100-200 m), while the proportions of dead individuals increased with depth, from 22% in the 100-200 m layer to 70% of the 500-1500 m layer. The total number of passive sinkers (carcasses and moults) was dominated by carcasses of small copepods in each depth layer, while the carbon biomass of passive sinkers was dominated by carcasses of large copepods. Both abundance and carbon biomass of passive sinkers decreased with depth. The average contribution of passive sinkers to the POC con-centration decreased from 0.27% in the 100-200 m depth stratum to 0.10% in the 500-1500 m layer. This study provides the first report of occurrence and contribution of carcasses from the surface to the mesopelagic layer of the Southern Ocean. This information can improve understanding of the role zooplankton play in downward carbon flux within the ocean's twilight zone.
资助项目	National Science Foundation of China[41876217] ; Impact and Response of Antarctic Seas to Climate Change[IRASCC 01-02-01D]
WOS研究方向	Oceanography
语种	英语
出版者	PERGAMON-ELSEVIER SCIENCE LTD
WOS记录号	WOS:000792647800005
内容类型	期刊论文
源URL	[http://ir.qdio.ac.cn/handle/337002/179242]
专题	海洋研究所_海洋环境工程技术研究发展中心
通讯作者	Li, Chaolun
作者单位	1.Chinese Acad Sci, Ctr Ocean Mega Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 2.Chinese Acad Sci, Inst Oceanol, Jiaozhou Bay Marine Ecosyst Res Stn, Qingdao 266071, Peoples R China 3.Chinese Acad Sci, Inst Oceanol, Engn Technol Dept, Qingdao 266071, Peoples R China 4.Chinese Acad Sci, Inst Oceanol, Ctr Deep Sea Res, Qingdao 266071, Peoples R China 5.Chinese Acad Sci, Inst Oceanol, Key Lab Marine Ecol & Environm Sci, 7 Nanhai Rd, Qingdao 266071, Peoples R China 6.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Ecol & Environm Sci, Qingdao 266071, Peoples R China 7.Univ Chinese Acad Sci, 19 Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Yang, Guang,Mou, Wenxiu,Chen, Xiaoli,et al. Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer[J]. DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,2022,198:7.
APA	Yang, Guang,Mou, Wenxiu,Chen, Xiaoli,Xu, Zhiqiang,Wang, Yanqing,&Li, Chaolun.(2022).Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer.DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY,198,7.
MLA	Yang, Guang,et al."Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer".DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY 198(2022):7.