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Biogeosciences An interactive open-access journal of the European Geosciences Union
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© Author(s) 2019. This work is distributed under
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© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

Research article 06 Mar 2019

Research article | 06 Mar 2019

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This discussion paper is a preprint. A revision of the manuscript is under review for the journal Biogeosciences (BG).

Collection of large benthic invertebrates in sediment traps in the Amundsen Sea, Antarctica

Minkyoung Kim1, Eun Jin Yang2, Hyung Jeek Kim3, Dongseon Kim3, Tae-Wan Kim2, Hyoung Sul La2, SangHoon Lee2, and Jeomshik Hwang1 Minkyoung Kim et al.
  • 1School of Earth and Environmental Sciences/Research Institute of Oceanography, Seoul National University, Seoul, 08826, South Korea
  • 2Korea Polar Research Institute, Incheon, 21990, South Korea
  • 3Korea Institute of Ocean Science & Technology, Busan, 49111, South Korea

Abstract. To study sinking particle sources and dynamics, sediment traps were deployed at three sites in the Amundsen Sea for one year from February/March 2012, and at one site from February 2016 to February 2018. Unexpectedly, large benthic invertebrates were found in three sediment traps deployed 130–567 m above the sea floor. The organisms included long and slender worms, a sea urchin, and juvenile scallops of varying sizes. This is the first reported collection of these benthic invertebrates in sediment traps. The collection of these organisms predominantly during the austral winter, and their intact bodies, suggests they were trapped in anchor ice, incorporated into the overlying sea ice, and subsequently transported by ice rafting. The observations imply that anchor ice forms episodically in the Amundsen Sea and has biological impacts on benthic ecosystems.

Minkyoung Kim et al.
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Status: final response (author comments only)
Status: final response (author comments only)
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Minkyoung Kim et al.
Minkyoung Kim et al.
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