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Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017-2018

Cited 1 time in wos
Cited 1 time in scopus
Title
Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017-2018
Other Titles
2017-2018 장보고과학기지(로스해 테라노바만) 주변에서의 식물플랑크톤과 TEP의 생화학적 조성의 계절변동
Authors
Park, Sanghoon
Park, Jisoo
Yoo, Kyu-Cheul
Yoo, Jaeill
Kim, Kwanwoo
Jo, Naeun
Jang, Hyo-Keun
Kim, Jaehong
Kim, Jaesoon
Kim, Joonmin
Lee, Sang-Heon
Subject
Environmental Sciences & EcologyWater Resources
Keywords
phytoplanktonmacromolecular compositiontransparent exopolymer particlesRoss Seapolar night
Issue Date
2021-08
Citation
Park, Sanghoon, et al. 2021. "Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017-2018". WATER, 13(16): 1-19.
Abstract
The biochemical composition of particulate organic matter (POM) mainly originates from phytoplankton. Transparent exopolymer particles (TEPs) depend on environmental conditions and play a role in the food web and biogeochemical cycle in marine ecosystems. However, little information on their characteristics in the Southern Ocean is available, particularly in winter. To investigate the seasonal characteristics of POM and TEPSs, seawater samples were collected once every two weeks from November 2017 to October 2018 at Jang Bogo Station (JBS) located on the coast of Terra Nova Bay in the Ross Sea. The total chlorophyll-a (Chl-a) concentrations increased from spring (0.08 +/- 0.06 mu g L-1) to summer (0.97 +/- 0.95 mu g L-1) with a highest Chl-a value of 2.15 mu g L-1. After sea ice formation, Chl-a rapidly decreased in autumn (0.12 +/- 0.10 mu g L-1) and winter (0.01 +/- 0.01 mu g L-1). The low phytoplankton Chl-a measured in this study was related to a short ice-free period in summer. Strong seasonal variations were detected in the concentrations of proteins and lipids (one-way ANOVA test, p < 0.05), whereas no significant difference in carbohydrate concentrations was observed among different seasons (one-way ANOVA test, p > 0.05). The phytoplankton community was mostly composed of diatoms (88.8% +/- 11.6%) with a large accumulation of lipids. During the summer, the POM primarily consisted of proteins. The composition being high in lipids and proteins and the high caloric content in summer indicated that the phytoplankton would make a good food source. In winter, the concentrations of proteins decreased sharply. In contrast, relatively stable concentrations of carbohydrates and lipids have been utilized for respiration and long-term energy storage in the survival of phytoplankton. The TEPS values were significantly correlated with variations in the biomass and species of the phytoplankton. Our study site was characterized by dominant diatoms and low Chl-a concentrations, which could have resulted in relatively low TEP concentrations compared to other areas. The average contributions of TEP-C to the total POC were relatively high in autumn (26.9% +/- 6.1%), followed by those in summer (21.9% +/- 7.1%), winter (13.0% +/- 4.2%), and spring (9.8% +/- 3.1%).
URI
https://repository.kopri.re.kr/handle/201206/13557
DOI
http://dx.doi.org/10.3390/w13162173
Type
Article
Station
Jang Bogo Station
Indexed
SCIE
Appears in Collections  
2021-2021, Carbon cycle change and ecosystem response under the Southern Ocean warming (21-21) / Park, Jisoo (PE21110)
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