Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018
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 charact...
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ftmdpi:oai:mdpi.com:/2073-4441/13/16/2173/ 2023-08-20T04:09:22+02:00 Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 Sanghoon Park Jisoo Park Kyu-Cheul Yoo Jaeill Yoo Kwanwoo Kim Naeun Jo Hyo-Keun Jang Jaehong Kim Jaesoon Kim Joonmin Kim Sang-Heon Lee agris 2021-08-08 application/pdf https://doi.org/10.3390/w13162173 EN eng Multidisciplinary Digital Publishing Institute Oceans and Coastal Zones https://dx.doi.org/10.3390/w13162173 https://creativecommons.org/licenses/by/4.0/ Water; Volume 13; Issue 16; Pages: 2173 phytoplankton macromolecular composition transparent exopolymer particles Ross Sea polar night Text 2021 ftmdpi https://doi.org/10.3390/w13162173 2023-08-01T02:23:21Z 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 μg L−1) to summer (0.97 ± 0.95 μg L−1) with a highest Chl-a value of 2.15 μg L−1. After sea ice formation, Chl-a rapidly decreased in autumn (0.12 ± 0.10 μg L−1) and winter (0.01 ± 0.01 μg 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 ... Text polar night Ross Sea Sea ice Southern Ocean MDPI Open Access Publishing Southern Ocean Ross Sea Terra Nova Bay Bogo ENVELOPE(9.783,9.783,63.095,63.095) Water 13 16 2173 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
phytoplankton macromolecular composition transparent exopolymer particles Ross Sea polar night |
spellingShingle |
phytoplankton macromolecular composition transparent exopolymer particles Ross Sea polar night Sanghoon Park Jisoo Park Kyu-Cheul Yoo Jaeill Yoo Kwanwoo Kim Naeun Jo Hyo-Keun Jang Jaehong Kim Jaesoon Kim Joonmin Kim Sang-Heon Lee Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 |
topic_facet |
phytoplankton macromolecular composition transparent exopolymer particles Ross Sea polar night |
description |
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 μg L−1) to summer (0.97 ± 0.95 μg L−1) with a highest Chl-a value of 2.15 μg L−1. After sea ice formation, Chl-a rapidly decreased in autumn (0.12 ± 0.10 μg L−1) and winter (0.01 ± 0.01 μg 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 ... |
format |
Text |
author |
Sanghoon Park Jisoo Park Kyu-Cheul Yoo Jaeill Yoo Kwanwoo Kim Naeun Jo Hyo-Keun Jang Jaehong Kim Jaesoon Kim Joonmin Kim Sang-Heon Lee |
author_facet |
Sanghoon Park Jisoo Park Kyu-Cheul Yoo Jaeill Yoo Kwanwoo Kim Naeun Jo Hyo-Keun Jang Jaehong Kim Jaesoon Kim Joonmin Kim Sang-Heon Lee |
author_sort |
Sanghoon Park |
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 |
title_short |
Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 |
title_full |
Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 |
title_fullStr |
Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 |
title_full_unstemmed |
Seasonal Variations in the Biochemical Compositions of Phytoplankton and Transparent Exopolymer Particles (TEPs) at Jang Bogo Station (Terra Nova Bay, Ross Sea), 2017–2018 |
title_sort |
seasonal variations in the biochemical compositions of phytoplankton and transparent exopolymer particles (teps) at jang bogo station (terra nova bay, ross sea), 2017–2018 |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2021 |
url |
https://doi.org/10.3390/w13162173 |
op_coverage |
agris |
long_lat |
ENVELOPE(9.783,9.783,63.095,63.095) |
geographic |
Southern Ocean Ross Sea Terra Nova Bay Bogo |
geographic_facet |
Southern Ocean Ross Sea Terra Nova Bay Bogo |
genre |
polar night Ross Sea Sea ice Southern Ocean |
genre_facet |
polar night Ross Sea Sea ice Southern Ocean |
op_source |
Water; Volume 13; Issue 16; Pages: 2173 |
op_relation |
Oceans and Coastal Zones https://dx.doi.org/10.3390/w13162173 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/w13162173 |
container_title |
Water |
container_volume |
13 |
container_issue |
16 |
container_start_page |
2173 |
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1774722274089238528 |