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Zooplankton and micronekton respond to climate fluctuations in the Amundsen Sea polynya, Antarctica
- La, H. S. (author)
- Park, K. (author)
-
- Wåhlin, Anna, 1970 (author)
- Gothenburg University,Göteborgs universitet,Institutionen för marina vetenskaper,Department of marine sciences
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- Arrigo, K. R. (author)
- Kim, D. S. (author)
- Yang, E. J. (author)
- Atkinson, A. (author)
- Fielding, S. (author)
- Im, J. (author)
- Kim, T. W. (author)
- Shin, H. C. (author)
- Lee, S. (author)
- Ha, H. K. (author)
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- (creator_code:org_t)
- 2019-07-12
- 2019
- English.
- In: Scientific Reports. - : Springer Science and Business Media LLC. - 2045-2322. ; 9
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- krill euphausia-superba
- warm deep-water
- vertical migration
- coastal
- polynya
- ice
- phytoplankton
- impact
- dynamics
- Science & Technology - Other Topics
Publication and Content Type
- ref (subject category)
- art (subject category)
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- La, H. S.
- Park, K.
- Wåhlin, Anna, 19 ...
- Arrigo, K. R.
- Kim, D. S.
- Yang, E. J.
- show more...
- Atkinson, A.
- Fielding, S.
- Im, J.
- Kim, T. W.
- Shin, H. C.
- Lee, S.
- Ha, H. K.
- show less...
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- University of Gothenburg
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