Further evidence of diel vertical migration of copepods under Arctic sea ice during summer

Abstract

MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 592:283-289 (2018) - DOI: https://doi.org/10.3354/meps12484 NOTE Further evidence of diel vertical migration of copepods under Arctic sea ice during summer Hyoung Sul La1,*, Koji Shimada2, Eun Jin Yang1, Kyoung-Ho Cho1, Sun-Yong Ha1, Jinyoung Jung1, Jun-Oh Min3, Sung-Ho Kang1, Ho Kyung Ha4 1Korea Polar Research Institute, Incheon 21990, Korea 2Tokyo University of Marine Science and Technology, Tokyo 108-0075, Japan 3Hanyang University, Ansan 15588, Korea 4Inha University, Incheon 22212, Korea *Corresponding author: hsla@kopri.re.kr ABSTRACT: We examined diel vertical variability of acoustic backscatter under sea ice during the midnight sun season at high latitude in the Canada Basin of the Arctic Ocean. Acoustic backscatter demonstrated that the dominant Arctic copepods (Calanus hyperboreus) consistently performed a distinct diel vertical migration (DVM) synchronized with the solar radiation cycle. DVM was mainly observed between 2 distinctive pycnocline layers at 25 and 45 m above the subsurface chlorophyll maximum (SCM) within Pacific summer water. Picophytoplankton (<2 µm) were mainly distributed within the SCM layer, whereas diatoms (>20 µm) were above the SCM layer. This indicated that light variation is a potential trigger for the DVM of Arctic copepods under sea ice, whereas the vertical depth of occurrence was primarily controlled by water mass stratification and food. This vertical behavior is significant to understanding how Arctic copepods adjust to their habitats relative to sea ice, water masses, and food sources in the dynamic environmental changes in the Arctic Ocean. KEY WORDS: Arctic copepod · Diel vertical migration · Pycnocline · Subsurface chlorophyll maximum · Acoustic Doppler current profiler Full text in pdf format Supplementary material PreviousCite this article as: La HS, Shimada K, Yang EJ, Cho KH and others (2018) Further evidence of diel vertical migration of copepods under Arctic sea ice during summer. Mar Ecol Prog Ser 592:283-289. https://doi.org/10.3354/meps12484 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 592. Online publication date: March 29, 2018 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2018 Inter-Research.