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Shift in polar benthic community structure in a fast retreating glacial area of Marian Cove, West Antarctica

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Title
Shift in polar benthic community structure in a fast retreating glacial area of Marian Cove, West Antarctica
Other Titles
서남극 마리안소만 빙하지역의 저서생물 변화 연구
Authors
Bae, Hanna
Ahn, In-Young
Park, Jinsoon
Song, Sung Joon
Noh, Junsung
Kim, Hosang
Khim, Jong Seong
Subject
Science & Technology
Keywords
Fragilaria striatula; Marian Cove; Navicula glaciei; Paralia sp.; diatom shift; glacial retreat
Issue Date
2021-01
Citation
Bae, Hanna, et al. 2021. "Shift in polar benthic community structure in a fast retreating glacial area of Marian Cove, West Antarctica". SCIENTIFIC REPORTS, 11(241): 1-10.
Abstract
Glacier retreat is a major long-standing global issue; however, the ecological impacts of such retreats on marine organisms remain unanswered. Here, we examined changes to the polar benthic community structure of "diatoms" under current global warming in a recently retreated glacial area of Marian Cove, Antarctica. The environments and spatiotemporal assemblages of benthic diatoms surveyed in 2018-2019 significantly varied between the intertidal (tidal height of 2.5 m) and subtidal zone (10 and 30 m). A distinct floral distribution along the cove (similar to 4.5 km) was characterized by the adaptive strategy of species present, with chain-forming species predominating near the glacier. The predominant chain-forming diatoms, such as Fragilaria striatula and Paralia sp., are widely distributed in the innermost cove over years, indicating sensitive responses of benthic species to the fast-evolving polar environment. The site-specific and substrate-dependent distributions of certain indicator species (e.g., F.striatula, Navicula glaciei, Cocconeis cf. pinnata) generally reflected such shifts in the benthic community. Our review revealed that the inner glacier region reflected trophic association, featured with higher diversity, abundance, and biomass of benthic diatoms and macrofauna. Overall, the polar benthic community shift observed along the cove generally represented changing environmental conditions, (in)directly linked to ice-melting due to the recent glacier retreat.
URI
https://repository.kopri.re.kr/handle/201206/12045
DOI
http://dx.doi.org/10.1038/s41598-020-80636-z
Appears in Collections  
2018-2018, Studies on the Changes in Coastal Marine Systems of the Antarctic Peninsula: A 2050 Outlook (18-18) / Ahn, In-Young (PE18070)
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