Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer
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 contribut...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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ftchinacasciocas:oai:ir.qdio.ac.cn:337002/179241 2023-05-15T13:50:10+02:00 Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer Yang, Guang Mou, Wenxiu Chen, Xiaoli Xu, Zhiqiang Wang, Yanqing Li, Chaolun 2022-04-01 http://ir.qdio.ac.cn/handle/337002/179241 https://doi.org/10.1016/j.dsr2.2022.105051 英语 eng PERGAMON-ELSEVIER SCIENCE LTD DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY http://ir.qdio.ac.cn/handle/337002/179241 doi:10.1016/j.dsr2.2022.105051 Zooplankton Carcasses Particulate organic carbon Mesopelagic zone Cosmonaut sea Southern ocean Oceanography PARTICULATE ORGANIC-CARBON ZOOPLANKTON FECAL PELLETS SOUTHERN-OCEAN EXPORT FLUX BROKE-WEST NONPREDATORY MORTALITY COMMUNITY STRUCTURE SEDIMENT TRAPS PARTICLE-FLUX ZONE 期刊论文 2022 ftchinacasciocas https://doi.org/10.1016/j.dsr2.2022.105051 2022-07-29T12:11:54Z 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. Report Antarc* Antarctica Cosmonaut sea Southern Ocean Copepods Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR Southern Ocean Austral Deep Sea Research Part II: Topical Studies in Oceanography 198 105051 |
institution |
Open Polar |
collection |
Institute of Oceanology, Chinese Academy of Sciences: IOCAS-IR |
op_collection_id |
ftchinacasciocas |
language |
English |
topic |
Zooplankton Carcasses Particulate organic carbon Mesopelagic zone Cosmonaut sea Southern ocean Oceanography PARTICULATE ORGANIC-CARBON ZOOPLANKTON FECAL PELLETS SOUTHERN-OCEAN EXPORT FLUX BROKE-WEST NONPREDATORY MORTALITY COMMUNITY STRUCTURE SEDIMENT TRAPS PARTICLE-FLUX ZONE |
spellingShingle |
Zooplankton Carcasses Particulate organic carbon Mesopelagic zone Cosmonaut sea Southern ocean Oceanography PARTICULATE ORGANIC-CARBON ZOOPLANKTON FECAL PELLETS SOUTHERN-OCEAN EXPORT FLUX BROKE-WEST NONPREDATORY MORTALITY COMMUNITY STRUCTURE SEDIMENT TRAPS PARTICLE-FLUX ZONE Yang, Guang Mou, Wenxiu Chen, Xiaoli Xu, Zhiqiang Wang, Yanqing Li, Chaolun Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
topic_facet |
Zooplankton Carcasses Particulate organic carbon Mesopelagic zone Cosmonaut sea Southern ocean Oceanography PARTICULATE ORGANIC-CARBON ZOOPLANKTON FECAL PELLETS SOUTHERN-OCEAN EXPORT FLUX BROKE-WEST NONPREDATORY MORTALITY COMMUNITY STRUCTURE SEDIMENT TRAPS PARTICLE-FLUX ZONE |
description |
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. |
format |
Report |
author |
Yang, Guang Mou, Wenxiu Chen, Xiaoli Xu, Zhiqiang Wang, Yanqing Li, Chaolun |
author_facet |
Yang, Guang Mou, Wenxiu Chen, Xiaoli Xu, Zhiqiang Wang, Yanqing Li, Chaolun |
author_sort |
Yang, Guang |
title |
Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
title_short |
Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
title_full |
Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
title_fullStr |
Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
title_full_unstemmed |
Vertical occurrence of copepod carcasses in the Cosmonaut Sea during austral summer |
title_sort |
vertical occurrence of copepod carcasses in the cosmonaut sea during austral summer |
publisher |
PERGAMON-ELSEVIER SCIENCE LTD |
publishDate |
2022 |
url |
http://ir.qdio.ac.cn/handle/337002/179241 https://doi.org/10.1016/j.dsr2.2022.105051 |
geographic |
Southern Ocean Austral |
geographic_facet |
Southern Ocean Austral |
genre |
Antarc* Antarctica Cosmonaut sea Southern Ocean Copepods |
genre_facet |
Antarc* Antarctica Cosmonaut sea Southern Ocean Copepods |
op_relation |
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY http://ir.qdio.ac.cn/handle/337002/179241 doi:10.1016/j.dsr2.2022.105051 |
op_doi |
https://doi.org/10.1016/j.dsr2.2022.105051 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
198 |
container_start_page |
105051 |
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1766253138757550080 |