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Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica

Cited 2 time in wos
Cited 4 time in scopus
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Title
Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica
Other Titles
남극 아문젠해 동물플랑크톤 소형 어류의 기후변화에 대한 반응
Authors
La, HyoungSul
Park, Keyhong
Wahlin, Anna
Arrigo, Kevin R.
Kim, Dong Seon
Yang, Eun Jin
Atkinson, Angus
Fielding, Sophie
Im, Jungho
Kim, Tae-Wan
Shin, Hyoung Chul
Lee, Sang Hoon
Ha, Ho Kyung
Subject
Science & Technology - Other Topics
Issue Date
2019-07
Citation
La, HyoungSul, et al. 2019. "Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica". SCIENTIFIC REPORTS, 9(10087): 1-7.
Abstract
The vertical migration of zooplankton and micronekton (hereafter ‘zooplankton’) has ramifications throughout the food web. Here, we present the first evidence that climate fluctuations affect the vertical migration of zooplankton in the Southern Ocean, based on multi-year acoustic backscatter data from one of the deep troughs in the Amundsen Sea, Antarctica. High net primary productivity (NPP) and the annual variation in seasonal ice cover make the Amundsen Sea coastal polynya an ideal site in which to examine how zooplankton behavior responds to climate fluctuations. Our observations show that the timing of the seasonal vertical migration and abundance of zooplankton in the seasonally varying sea ice is correlated with the Southern Annular Mode (SAM) and El Nino Southern Oscillation (ENSO). Zooplankton in this region migrate seasonally and overwinter at depth, returning to the surface in spring. During +SAM/La Nina periods, the at-depth overwintering period is shorter compared to ?SAM/El Nino periods, and return to the surface layers starts earlier in the year. These differences may result from the higher sea ice cover and decreased NPP during +SAM/La Nina periods. This observation points to a new link between global climate fluctuations and the polar marine food web.
URI
https://repository.kopri.re.kr/handle/201206/10932
DOI
http://dx.doi.org/10.1038/s41598-019-46423-1
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