Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica
Abstract In the Antarctic coast, ice shelves are rapidly thinning and retreating due to global warming. Basal melt water influences marine life, particularly the phytoplankton, which are directly affected by changes in physicochemical environments. However, there is limited in situ data over large a...
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crioppubl:10.1088/1748-9326/ac9a5f 2024-06-02T07:54:59+00:00 Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica Lee, Youngju Park, Jisoo Jung, Jinyoung Kim, Tae Wan Korea Polar Research Institute 2022 http://dx.doi.org/10.1088/1748-9326/ac9a5f https://iopscience.iop.org/article/10.1088/1748-9326/ac9a5f https://iopscience.iop.org/article/10.1088/1748-9326/ac9a5f/pdf unknown IOP Publishing http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining Environmental Research Letters volume 17, issue 11, page 114022 ISSN 1748-9326 journal-article 2022 crioppubl https://doi.org/10.1088/1748-9326/ac9a5f 2024-05-07T13:57:17Z Abstract In the Antarctic coast, ice shelves are rapidly thinning and retreating due to global warming. Basal melt water influences marine life, particularly the phytoplankton, which are directly affected by changes in physicochemical environments. However, there is limited in situ data over large areas in the Amundsen Sea, which is currently a hotspot for rapidly thinning ice shelves in West Antarctica. During the austral summer cruise of 2020, phytoplankton species abundance was investigated along the Amundsen Sea coast using an automated continuous observation instrument, the Imaging FlowCytobot. The phytoplankton community was dominated by Phaeocystis antarctica in most coastal waters of the Amundsen Sea, as previously reported; however, unexpected blooms of diatom Dactyliosolen tenuijunctus were observed throughout the Pine Island Bay region at a high dominance rate (∼90%) and abundance (>10 7 cells l −1 ). D. tenuijunctus is a weakly silicified diatom and its massive bloom in the water column has been rarely reported from the Antarctic Ocean. The dramatic difference in phytoplankton compositions between these adjacent polynyas probably indicates an unstable response of phytoplankton to ice melting conditions. They could play a different role in the marine food web and carbon flux compared to other diatoms and P. antarctica . Therefore, further research is warranted to predict the biological and biogeochemical impacts of future melting conditions. Article in Journal/Newspaper Amundsen Sea Antarc* Antarctic Antarctic Ocean Antarctica Ice Shelves Pine Island Pine Island Bay West Antarctica IOP Publishing Antarctic The Antarctic Austral West Antarctica Amundsen Sea Antarctic Ocean Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) Environmental Research Letters 17 11 114022 |
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Abstract In the Antarctic coast, ice shelves are rapidly thinning and retreating due to global warming. Basal melt water influences marine life, particularly the phytoplankton, which are directly affected by changes in physicochemical environments. However, there is limited in situ data over large areas in the Amundsen Sea, which is currently a hotspot for rapidly thinning ice shelves in West Antarctica. During the austral summer cruise of 2020, phytoplankton species abundance was investigated along the Amundsen Sea coast using an automated continuous observation instrument, the Imaging FlowCytobot. The phytoplankton community was dominated by Phaeocystis antarctica in most coastal waters of the Amundsen Sea, as previously reported; however, unexpected blooms of diatom Dactyliosolen tenuijunctus were observed throughout the Pine Island Bay region at a high dominance rate (∼90%) and abundance (>10 7 cells l −1 ). D. tenuijunctus is a weakly silicified diatom and its massive bloom in the water column has been rarely reported from the Antarctic Ocean. The dramatic difference in phytoplankton compositions between these adjacent polynyas probably indicates an unstable response of phytoplankton to ice melting conditions. They could play a different role in the marine food web and carbon flux compared to other diatoms and P. antarctica . Therefore, further research is warranted to predict the biological and biogeochemical impacts of future melting conditions. |
author2 |
Korea Polar Research Institute |
format |
Article in Journal/Newspaper |
author |
Lee, Youngju Park, Jisoo Jung, Jinyoung Kim, Tae Wan |
spellingShingle |
Lee, Youngju Park, Jisoo Jung, Jinyoung Kim, Tae Wan Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
author_facet |
Lee, Youngju Park, Jisoo Jung, Jinyoung Kim, Tae Wan |
author_sort |
Lee, Youngju |
title |
Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
title_short |
Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
title_full |
Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
title_fullStr |
Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
title_full_unstemmed |
Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
title_sort |
unprecedented differences in phytoplankton community structures in the amundsen sea polynyas, west antarctica |
publisher |
IOP Publishing |
publishDate |
2022 |
url |
http://dx.doi.org/10.1088/1748-9326/ac9a5f https://iopscience.iop.org/article/10.1088/1748-9326/ac9a5f https://iopscience.iop.org/article/10.1088/1748-9326/ac9a5f/pdf |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Antarctic The Antarctic Austral West Antarctica Amundsen Sea Antarctic Ocean Island Bay Pine Island Bay |
geographic_facet |
Antarctic The Antarctic Austral West Antarctica Amundsen Sea Antarctic Ocean Island Bay Pine Island Bay |
genre |
Amundsen Sea Antarc* Antarctic Antarctic Ocean Antarctica Ice Shelves Pine Island Pine Island Bay West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctic Antarctic Ocean Antarctica Ice Shelves Pine Island Pine Island Bay West Antarctica |
op_source |
Environmental Research Letters volume 17, issue 11, page 114022 ISSN 1748-9326 |
op_rights |
http://creativecommons.org/licenses/by/4.0 https://iopscience.iop.org/info/page/text-and-data-mining |
op_doi |
https://doi.org/10.1088/1748-9326/ac9a5f |
container_title |
Environmental Research Letters |
container_volume |
17 |
container_issue |
11 |
container_start_page |
114022 |
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1800744661097119744 |