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DIEL VERTICAL MIGRATION OF ARCTIC COPEPODS UNDER SEA ICE IN THE CANADA BASIN

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Title
DIEL VERTICAL MIGRATION OF ARCTIC COPEPODS UNDER SEA ICE IN THE CANADA BASIN
Authors
La, Hyoung Sul
Shimada, Koji
Yang, Eun Jin
Ha, Sun-Yong
Yoshizawa, Eri
Min, Jun-Oh
Kang, Sung-Ho
Ha, Ho Kyung
Subject
International Symposium on Polar Sciences; Arctic copepods; Vertical migration; Zooplankton; Arctic
Issue Date
2015
Citation
La, Hyoung Sul., et al. 2015. DIEL VERTICAL MIGRATION OF ARCTIC COPEPODS UNDER SEA ICE IN THE CANADA BASIN. The 21st International Symposium on Polar Sciences, Incheon, 2015.5.19.-20.
Abstract
The vertical migration of zooplankton is essential component of the ‘biological pump in the Arctic as they actively export carbon out of the productive surface waters to the bottom. Arctic copepods of the genus Calanus, which are the dominant herbivores in Arctic seas, play a key role in pelagic food webs. We investigated the vertical migration of Arctic copepods under sea ice during summer using a 300-kHz acoustic Doppler current profiler (ADCP). Three sediment traps were moored at 15-m depth from under sea ice to verify the zooplankton species. These were supplemented by environmental data collected with a conductivity, temperature and depth (CTD) profiler. The Calanus hyperboreus was predominant with about 5 mm total lengths. The acoustic backscatter showed a typical diel vertical behavior with a significant correlation with surface solar radiation, even if the region was covered by sea ice. This study could provide important information what factors determine the migration behavior of Calanus hyperboreus under Arctic sea ice during summer.
Conference Name
The 21st International Symposium on Polar Sciences
Conference Place
Incheon
Conference Date
2015.5.19.-20.
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