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Effect of ultraviolet irradiation on the production and composition of fatty acids in plankton in a sub-Antarctic environment

Cited 7 time in wos
Cited 10 time in scopus
Title
Effect of ultraviolet irradiation on the production and composition of fatty acids in plankton in a sub-Antarctic environment
Other Titles
아남극 환경에서 자외선에 의한 부유생물의 지방산 조성 및 생산력 변화
Authors
Ha, Sun-Yong
Shin, Kyung-Hoon
Ahn, In-Young
Kang, Sung-Ho
Joo, Hyong-Min
Keywords
AntarcticaCarbon stable isotopeFatty acidsFoodwebUV-B radiation
Issue Date
2014
Citation
Ha, Sun-Yong, et al. 2014. "Effect of ultraviolet irradiation on the production and composition of fatty acids in plankton in a sub-Antarctic environment". JOURNAL OF OCEANOGRAPHY, 70(1): 1-10.
Abstract
We investigated the effects of ultraviolet-B (UV-B) radiation on the natural phytoplankton assemblage in Marine Cove on King George Island, Antarctica, in December 2005. The amount of newly synthesized phytoplankton polyunsaturated fatty acids (PUFAs) was lower with exposure to full irradiation (PAR?UV-A?UV-B) than without such exposure (exposed instead to PAR?UVA radiation) in an in situ incubation under the light conditions in two different types of incubation bottles: quartz bottles transmitting all light wavelengths including UV-B and polycarbonate bottles with no UV-B transmission and 20 % reduced PAR compared to the quartz bottle. However, the amount of newly synthesized saturated fatty acids was greater with than without UV-B radiation. Thus, UV-B radiation may have a significant influence on fatty acid synthesis in phytoplankton. In particular, the production of eicosapentaenoic acid [20:5(n-3)] and docosahexaenoic acid [22:6(n-3)] was reduced during incubation under the natural solar radiation including UV-B. To understand the indirect influence of UV-B on herbivores (the secondary producer), we conducted feeding experiments with amphipods fed in situ on the natural phytoplankton assemblage. The amphipods fed on the phytoplankton with the low PUFA values also exhibited a low PUFA accumulation rate, which could negatively affect their growth, development, and reproduction. Consequently, the diminished rate of essential fatty acid synthesis [especially 20:5(n-3) and 22:6(n-3)] in primary producers caused by UV-B exposure could affect the structure and function of the Antarctic marine ecosystem.
URI
https://repository.kopri.re.kr/handle/201206/7253
DOI
http://dx.doi.org/10.1007/s10872-013-0207-3
Type
Article
Indexed
SCIE
Appears in Collections  
2008-2010, Studies on Polar organisms and ecosystem changes (08-10) / Ahn, In-Young (PE09040, PE10040, PE08040)
2011-2016, Korea Polar Ocean in Rapid Transition (K-PORT) / Kang, Sung-Ho (PM11080; PM12020; PM13020; PM14040; PM14040; PM15040)
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