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

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Title
Collection of large benthic invertebrates in sediment traps in the Amundsen Sea, Antarctica
Other Titles
남극 아문젠해에서 퇴적물 트랩을 활용한 대형 저서 무척추 동물 채집.
Authors
Kim, Minkyoung
Yang, Eun Jin
Kim, Hyung Jeek
Kim, Dongseon
Kim, Tae-Wan
La, HyoungSul
Lee, Sang Hoon
Hwang, Jeomshik
Subject
Environmental Sciences & Ecology; Geology
Issue Date
2019-07
Citation
Kim, Minkyoung, et al. 2019. "Collection of large benthic invertebrates in sediment traps in the Amundsen Sea, Antarctica". BIOGEOSCIENCES, 16(13): 2683-2691.
Abstract
To study sinking particle sources and dynamics, sediment traps were deployed at three sites in the Amundsen Sea for 1 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. An alternative hypothesis that these organisms spend their juvenile period underneath the sea ice and subsequently sink to the seafloor is also suggested.
URI
https://repository.kopri.re.kr/handle/201206/10946
DOI
http://dx.doi.org/10.5194/bg-16-2683-2019
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