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Im, Jungho
Intelligent Remote sensing and geospatial Information Science (IRIS) Lab
Research Interests
  • Remote sensing, Geospatial modeling, Disaster monitoring and management, Climate change

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

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Title
Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica
Author
La, Hyoung SulPark, KeyhongWahlin, AnnaArrigo, Kevin R.Kim, Dong SeonYang, Eun JinAtkinson, AngusFielding, SophieIm, JunghoKim, Tae-WanShin, Hyoung ChulLee, SangHoonHa, Ho Kyung
Issue Date
2019-07
Publisher
NATURE PUBLISHING GROUP
Citation
SCIENTIFIC REPORTS, v.9, no.1, pp.10087
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://scholarworks.unist.ac.kr/handle/201301/27183
URL
https://www.nature.com/articles/s41598-019-46423-1
DOI
10.1038/s41598-019-46423-1
ISSN
2045-2322
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UEE_Journal Papers
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