A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes
Polynyas in the polar seas are regarded as windows through which ecosystem responses associated with global climate changes are to be noticed. However, little information is available on benthic microbial communities in the Amundsen Sea polynya (ASP), where environmental changes due to global warmin...
Published in: | Frontiers in Marine Science |
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Online Access: | https://hdl.handle.net/10371/189759 https://doi.org/10.3389/fmars.2019.00797 |
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ftseoulnuniv:oai:s-space.snu.ac.kr:10371/189759 2023-08-15T12:37:20+02:00 A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes Cho, Hyeyoun Hwang, Chung Yeon Kim, Jong-Geol Kang, Sanghoon Knittel, Katrin Choi, Ayeon Kim, Sung-Han Rhee, Sung-Keun Yang, Eun Jin Lee, SangHoon Hyun, Jung-Ho Hwang, Chung Yeon 2020-05-22 https://hdl.handle.net/10371/189759 https://doi.org/10.3389/fmars.2019.00797 영어 unknown Frontiers Media S.A. Frontiers in Marine Science, Vol.6, p. 797 2296-7745 https://hdl.handle.net/10371/189759 doi:10.3389/fmars.2019.00797 000506839700001 2-s2.0-85078107447 101415 RIBOSOMAL-RNA SEQUENCES PINE ISLAND GLACIER BACTERIAL COMMUNITIES MARINE-SEDIMENTS ROSS SEA SP-NOV RHODOPIRELLULA-BALTICA PHYTOPLANKTON BLOOM AMMONIA OXIDATION CONTINENTAL-SHELF Amundsen Sea polynya Antarctica benthic microbial community global climate change organic carbon mineralization Phaesocystis antarctica Planctomycetes Thaumarchaeota Article ART 2020 ftseoulnuniv https://doi.org/10.3389/fmars.2019.00797 2023-07-21T00:37:29Z Polynyas in the polar seas are regarded as windows through which ecosystem responses associated with global climate changes are to be noticed. However, little information is available on benthic microbial communities in the Amundsen Sea polynya (ASP), where environmental changes due to global warming are occurring rapidly, from which future climate change-induced ecosystem responses could be assessed. We performed high-throughput sequencing of 16S rRNA genes and quantitative PCR in combination with biogeochemical analyses and metabolic rate measurements to determine the composition, diversity and controls of major microbial communities in sediments of the ASP. A large fraction of the sequenced benthic microbial community (40% on average) in the polynya was uniquely affiliated with the phylum Planctomycetes, whereas Thaumarchaeota (51% on average) predominated in non-polynya areas. The relative abundance of Planctomycetes correlated significantly with organic carbon (C org ) content in the polynya sediment underlying the Phaeocystis-dominated water column. These results suggest that Planctomycetes comprise a major bacterial group utilizing relatively recalcitrant C org produced primarily by Phaeocystis blooms. In contrast, the predominance of chemolithoautotrohic Thaumarchaeota in the sea-ice zone was attributed to low C o r g supply due to low primary productivity in the ice-covered water column. The Planctomycetes-dominated microbial communities in the ASP is in stark contrast to that Proteobacteria (Delta- and Gamma-proteobacteria) occupy ecological niches as primary mineralizers of organic materials in most benthic systems in the Southern Ocean, where organic materials in the sediments mostly originate from diatom blooms. Given that microbial communities respond quickly to environmental changes, and that global climate change is proceeding rapidly in the ASP, our results suggest that any modifications in the Flanctomycetas-dominated microbial communities will provide valuable insight into changes in organic ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Pine Island Pine Island Glacier Ross Sea Sea ice Southern Ocean Seoul National University: S-Space Amundsen Sea Pine Island Glacier ENVELOPE(-101.000,-101.000,-75.000,-75.000) Ross Sea Southern Ocean Frontiers in Marine Science 6 |
institution |
Open Polar |
collection |
Seoul National University: S-Space |
op_collection_id |
ftseoulnuniv |
language |
unknown |
topic |
RIBOSOMAL-RNA SEQUENCES PINE ISLAND GLACIER BACTERIAL COMMUNITIES MARINE-SEDIMENTS ROSS SEA SP-NOV RHODOPIRELLULA-BALTICA PHYTOPLANKTON BLOOM AMMONIA OXIDATION CONTINENTAL-SHELF Amundsen Sea polynya Antarctica benthic microbial community global climate change organic carbon mineralization Phaesocystis antarctica Planctomycetes Thaumarchaeota |
spellingShingle |
RIBOSOMAL-RNA SEQUENCES PINE ISLAND GLACIER BACTERIAL COMMUNITIES MARINE-SEDIMENTS ROSS SEA SP-NOV RHODOPIRELLULA-BALTICA PHYTOPLANKTON BLOOM AMMONIA OXIDATION CONTINENTAL-SHELF Amundsen Sea polynya Antarctica benthic microbial community global climate change organic carbon mineralization Phaesocystis antarctica Planctomycetes Thaumarchaeota Cho, Hyeyoun Hwang, Chung Yeon Kim, Jong-Geol Kang, Sanghoon Knittel, Katrin Choi, Ayeon Kim, Sung-Han Rhee, Sung-Keun Yang, Eun Jin Lee, SangHoon Hyun, Jung-Ho A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
topic_facet |
RIBOSOMAL-RNA SEQUENCES PINE ISLAND GLACIER BACTERIAL COMMUNITIES MARINE-SEDIMENTS ROSS SEA SP-NOV RHODOPIRELLULA-BALTICA PHYTOPLANKTON BLOOM AMMONIA OXIDATION CONTINENTAL-SHELF Amundsen Sea polynya Antarctica benthic microbial community global climate change organic carbon mineralization Phaesocystis antarctica Planctomycetes Thaumarchaeota |
description |
Polynyas in the polar seas are regarded as windows through which ecosystem responses associated with global climate changes are to be noticed. However, little information is available on benthic microbial communities in the Amundsen Sea polynya (ASP), where environmental changes due to global warming are occurring rapidly, from which future climate change-induced ecosystem responses could be assessed. We performed high-throughput sequencing of 16S rRNA genes and quantitative PCR in combination with biogeochemical analyses and metabolic rate measurements to determine the composition, diversity and controls of major microbial communities in sediments of the ASP. A large fraction of the sequenced benthic microbial community (40% on average) in the polynya was uniquely affiliated with the phylum Planctomycetes, whereas Thaumarchaeota (51% on average) predominated in non-polynya areas. The relative abundance of Planctomycetes correlated significantly with organic carbon (C org ) content in the polynya sediment underlying the Phaeocystis-dominated water column. These results suggest that Planctomycetes comprise a major bacterial group utilizing relatively recalcitrant C org produced primarily by Phaeocystis blooms. In contrast, the predominance of chemolithoautotrohic Thaumarchaeota in the sea-ice zone was attributed to low C o r g supply due to low primary productivity in the ice-covered water column. The Planctomycetes-dominated microbial communities in the ASP is in stark contrast to that Proteobacteria (Delta- and Gamma-proteobacteria) occupy ecological niches as primary mineralizers of organic materials in most benthic systems in the Southern Ocean, where organic materials in the sediments mostly originate from diatom blooms. Given that microbial communities respond quickly to environmental changes, and that global climate change is proceeding rapidly in the ASP, our results suggest that any modifications in the Flanctomycetas-dominated microbial communities will provide valuable insight into changes in organic ... |
author2 |
Hwang, Chung Yeon |
format |
Article in Journal/Newspaper |
author |
Cho, Hyeyoun Hwang, Chung Yeon Kim, Jong-Geol Kang, Sanghoon Knittel, Katrin Choi, Ayeon Kim, Sung-Han Rhee, Sung-Keun Yang, Eun Jin Lee, SangHoon Hyun, Jung-Ho |
author_facet |
Cho, Hyeyoun Hwang, Chung Yeon Kim, Jong-Geol Kang, Sanghoon Knittel, Katrin Choi, Ayeon Kim, Sung-Han Rhee, Sung-Keun Yang, Eun Jin Lee, SangHoon Hyun, Jung-Ho |
author_sort |
Cho, Hyeyoun |
title |
A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
title_short |
A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
title_full |
A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
title_fullStr |
A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
title_full_unstemmed |
A Unique Benthic Microbial Community Underlying the Phaeocystis antarctica-Dominated Amundsen Sea Polynya, Antarctica: A Proxy for Assessing the Impact of Global Changes |
title_sort |
unique benthic microbial community underlying the phaeocystis antarctica-dominated amundsen sea polynya, antarctica: a proxy for assessing the impact of global changes |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://hdl.handle.net/10371/189759 https://doi.org/10.3389/fmars.2019.00797 |
long_lat |
ENVELOPE(-101.000,-101.000,-75.000,-75.000) |
geographic |
Amundsen Sea Pine Island Glacier Ross Sea Southern Ocean |
geographic_facet |
Amundsen Sea Pine Island Glacier Ross Sea Southern Ocean |
genre |
Amundsen Sea Antarc* Antarctica Pine Island Pine Island Glacier Ross Sea Sea ice Southern Ocean |
genre_facet |
Amundsen Sea Antarc* Antarctica Pine Island Pine Island Glacier Ross Sea Sea ice Southern Ocean |
op_relation |
Frontiers in Marine Science, Vol.6, p. 797 2296-7745 https://hdl.handle.net/10371/189759 doi:10.3389/fmars.2019.00797 000506839700001 2-s2.0-85078107447 101415 |
op_doi |
https://doi.org/10.3389/fmars.2019.00797 |
container_title |
Frontiers in Marine Science |
container_volume |
6 |
_version_ |
1774292096915603456 |