Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica
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 t...
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ftdoajarticles:oai:doaj.org/article:e5351501f7554458892c097019e8cdb1 2023-09-05T13:11:43+02:00 Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica Youngju Lee Jisoo Park Jinyoung Jung Tae Wan Kim 2022-01-01T00:00:00Z https://doi.org/10.1088/1748-9326/ac9a5f https://doaj.org/article/e5351501f7554458892c097019e8cdb1 EN eng IOP Publishing https://doi.org/10.1088/1748-9326/ac9a5f https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac9a5f 1748-9326 https://doaj.org/article/e5351501f7554458892c097019e8cdb1 Environmental Research Letters, Vol 17, Iss 11, p 114022 (2022) phytoplankton Dactyliosolen tenuijunctus Phaeocystis antarctica Amundsen Sea Antarctica Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 article 2022 ftdoajarticles https://doi.org/10.1088/1748-9326/ac9a5f 2023-08-13T00:36:54Z 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 Directory of Open Access Journals: DOAJ Articles Amundsen Sea Antarctic Antarctic Ocean Austral Island Bay ENVELOPE(-109.085,-109.085,59.534,59.534) Pine Island Bay ENVELOPE(-102.000,-102.000,-74.750,-74.750) The Antarctic West Antarctica Environmental Research Letters 17 11 114022 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
phytoplankton Dactyliosolen tenuijunctus Phaeocystis antarctica Amundsen Sea Antarctica Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
spellingShingle |
phytoplankton Dactyliosolen tenuijunctus Phaeocystis antarctica Amundsen Sea Antarctica Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 Youngju Lee Jisoo Park Jinyoung Jung Tae Wan Kim Unprecedented differences in phytoplankton community structures in the Amundsen Sea Polynyas, West Antarctica |
topic_facet |
phytoplankton Dactyliosolen tenuijunctus Phaeocystis antarctica Amundsen Sea Antarctica Environmental technology. Sanitary engineering TD1-1066 Environmental sciences GE1-350 Science Q Physics QC1-999 |
description |
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. |
format |
Article in Journal/Newspaper |
author |
Youngju Lee Jisoo Park Jinyoung Jung Tae Wan Kim |
author_facet |
Youngju Lee Jisoo Park Jinyoung Jung Tae Wan Kim |
author_sort |
Youngju Lee |
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 |
https://doi.org/10.1088/1748-9326/ac9a5f https://doaj.org/article/e5351501f7554458892c097019e8cdb1 |
long_lat |
ENVELOPE(-109.085,-109.085,59.534,59.534) ENVELOPE(-102.000,-102.000,-74.750,-74.750) |
geographic |
Amundsen Sea Antarctic Antarctic Ocean Austral Island Bay Pine Island Bay The Antarctic West Antarctica |
geographic_facet |
Amundsen Sea Antarctic Antarctic Ocean Austral Island Bay Pine Island Bay The Antarctic West Antarctica |
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, Vol 17, Iss 11, p 114022 (2022) |
op_relation |
https://doi.org/10.1088/1748-9326/ac9a5f https://doaj.org/toc/1748-9326 doi:10.1088/1748-9326/ac9a5f 1748-9326 https://doaj.org/article/e5351501f7554458892c097019e8cdb1 |
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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1776196898189737984 |