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30 years revisit survey for long-term changes in the Antarctic subtidal algal assemblage

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Title
30 years revisit survey for long-term changes in the Antarctic subtidal algal assemblage
Other Titles
남극 조하대 해조류 군집의 장기변화 관측을 위한 30년 재방문 조사
Authors
Ko, Young Wook
Choi, Han-Gu
Lee, Dong Seok
Kim, Jeong Ha
Subject
Science & Technology
Keywords
Antarctic; Long-term change; Macroalgae; Monitoring
Issue Date
2020-05
Citation
Ko, Young Wook, et al. 2020. "30 years revisit survey for long-term changes in the Antarctic subtidal algal assemblage". SCIENTIFIC REPORTS, 10(1): 8481-8492.
Abstract
A long-term change of a subtidal macroalgal assemblage has been investigated in Maxwell Bay, King George Island (KGI) of the Antarctic coast by a revisit survey after 30 years. Field surveys were done by SCUBA diving at six sites in 2016-2018 to directly compare with the previous survey conducted in 1988-1993 at the same sites. The total number of macroalgal species was similar between the previous and the present survey, 25 and 27 species respectively. However, the macroalgal assemblage changed substantially with the average similarity of 48.2% between the two surveys. Also, the species-level abundance showed a high variability between surveys. On the other hand, over the 30 years interval there was little overall change at the between-site level hierarchical structure in the subtidal communities of Maxwell Bay. The sites near the penguin rookery consistently showed the highest biodiversity, indicating the importance of land-based nutrients input in Antarctic coastal habitats. A noticeable pattern change over 30 years was the increase of Desmarestia complex and Plocamium cartilagineum and the decrease of Himantothallus grandifolius. Both groups are still dominant, but the shift from Himantothallus to Desmarestia-Plocamium may reflects temperature rise on the Maxwell Bay coast compared to the past.
URI
https://repository.kopri.re.kr/handle/201206/12082
DOI
http://dx.doi.org/10.1038/s41598-020-65039-4
Appears in Collections  
2019-2019, Studies on the Changes in Coastal Marine Systems of the Antarctic Peninsula: A 2050 Outlook (19-19) / Ahn, In-Young (PE19070)
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