Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Microbiology 6 (2015): 1090, doi:10.3389/fmicb.2015.01090. Antarctica polynyas support intense phytoplankton blooms, impacting their en...
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ftwhoas:oai:darchive.mblwhoilibrary.org:1912/7667 2023-05-15T13:23:49+02:00 Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica Delmont, Tom O. Eren, A. Murat Vineis, Joseph H. Post, Anton F. 2015-10-26 application/vnd.ms-excel application/pdf https://hdl.handle.net/1912/7667 en_US eng Frontiers Media https://doi.org/10.3389/fmicb.2015.01090 Frontiers in Microbiology 6 (2015): 1090 https://hdl.handle.net/1912/7667 doi:10.3389/fmicb.2015.01090 Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ CC-BY Frontiers in Microbiology 6 (2015): 1090 doi:10.3389/fmicb.2015.01090 Southern Ocean Amundsen Sea Polynya Phytoplankton bloom Phaeocystis Micromonas Microbial communities Metagenomics Genome reconstruction Article 2015 ftwhoas https://doi.org/10.3389/fmicb.2015.01090 2022-05-28T22:59:27Z © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Microbiology 6 (2015): 1090, doi:10.3389/fmicb.2015.01090. Antarctica polynyas support intense phytoplankton blooms, impacting their environment by a substantial depletion of inorganic carbon and nutrients. These blooms are dominated by the colony-forming haptophyte Phaeocystis antarctica and they are accompanied by a distinct bacterial population. Yet, the ecological role these bacteria may play in P. antarctica blooms awaits elucidation of their functional gene pool and of the geochemical activities they support. Here, we report on a metagenome (~160 million reads) analysis of the microbial community associated with a P. antarctica bloom event in the Amundsen Sea polynya (West Antarctica). Genomes of the most abundant Bacteroidetes and Proteobacteria populations have been reconstructed and a network analysis indicates a strong functional partitioning of these bacterial taxa. Three of them (SAR92, and members of the Oceanospirillaceae and Cryomorphaceae) are found in close association with P. antarctica colonies. Distinct features of their carbohydrate, nitrogen, sulfur and iron metabolisms may serve to support mutualistic relationships with P. antarctica. The SAR92 genome indicates a specialization in the degradation of fatty acids and dimethylsulfoniopropionate (compounds released by P. antarctica) into dimethyl sulfide, an aerosol precursor. The Oceanospirillaceae genome carries genes that may enhance algal physiology (cobalamin synthesis). Finally, the Cryomorphaceae genome is enriched in genes that function in cell or colony invasion. A novel pico-eukaryote, Micromonas related genome (19.6 Mb, ~94% completion) was also recovered. It contains the gene for an anti-freeze protein, which is lacking in Micromonas at lower latitudes. These draft genomes are representative for abundant microbial taxa across the Southern Ocean surface. This work ... Article in Journal/Newspaper Amundsen Sea Antarc* Antarctica Southern Ocean West Antarctica Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) Amundsen Sea Southern Ocean West Antarctica Frontiers in Microbiology 6 |
institution |
Open Polar |
collection |
Woods Hole Scientific Community: WHOAS (Woods Hole Open Access Server) |
op_collection_id |
ftwhoas |
language |
English |
topic |
Southern Ocean Amundsen Sea Polynya Phytoplankton bloom Phaeocystis Micromonas Microbial communities Metagenomics Genome reconstruction |
spellingShingle |
Southern Ocean Amundsen Sea Polynya Phytoplankton bloom Phaeocystis Micromonas Microbial communities Metagenomics Genome reconstruction Delmont, Tom O. Eren, A. Murat Vineis, Joseph H. Post, Anton F. Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
topic_facet |
Southern Ocean Amundsen Sea Polynya Phytoplankton bloom Phaeocystis Micromonas Microbial communities Metagenomics Genome reconstruction |
description |
© The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Microbiology 6 (2015): 1090, doi:10.3389/fmicb.2015.01090. Antarctica polynyas support intense phytoplankton blooms, impacting their environment by a substantial depletion of inorganic carbon and nutrients. These blooms are dominated by the colony-forming haptophyte Phaeocystis antarctica and they are accompanied by a distinct bacterial population. Yet, the ecological role these bacteria may play in P. antarctica blooms awaits elucidation of their functional gene pool and of the geochemical activities they support. Here, we report on a metagenome (~160 million reads) analysis of the microbial community associated with a P. antarctica bloom event in the Amundsen Sea polynya (West Antarctica). Genomes of the most abundant Bacteroidetes and Proteobacteria populations have been reconstructed and a network analysis indicates a strong functional partitioning of these bacterial taxa. Three of them (SAR92, and members of the Oceanospirillaceae and Cryomorphaceae) are found in close association with P. antarctica colonies. Distinct features of their carbohydrate, nitrogen, sulfur and iron metabolisms may serve to support mutualistic relationships with P. antarctica. The SAR92 genome indicates a specialization in the degradation of fatty acids and dimethylsulfoniopropionate (compounds released by P. antarctica) into dimethyl sulfide, an aerosol precursor. The Oceanospirillaceae genome carries genes that may enhance algal physiology (cobalamin synthesis). Finally, the Cryomorphaceae genome is enriched in genes that function in cell or colony invasion. A novel pico-eukaryote, Micromonas related genome (19.6 Mb, ~94% completion) was also recovered. It contains the gene for an anti-freeze protein, which is lacking in Micromonas at lower latitudes. These draft genomes are representative for abundant microbial taxa across the Southern Ocean surface. This work ... |
format |
Article in Journal/Newspaper |
author |
Delmont, Tom O. Eren, A. Murat Vineis, Joseph H. Post, Anton F. |
author_facet |
Delmont, Tom O. Eren, A. Murat Vineis, Joseph H. Post, Anton F. |
author_sort |
Delmont, Tom O. |
title |
Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
title_short |
Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
title_full |
Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
title_fullStr |
Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
title_full_unstemmed |
Genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the Amundsen Sea, Antarctica |
title_sort |
genome reconstructions indicate the partitioning of ecological functions inside a phytoplankton bloom in the amundsen sea, antarctica |
publisher |
Frontiers Media |
publishDate |
2015 |
url |
https://hdl.handle.net/1912/7667 |
geographic |
Amundsen Sea Southern Ocean West Antarctica |
geographic_facet |
Amundsen Sea Southern Ocean West Antarctica |
genre |
Amundsen Sea Antarc* Antarctica Southern Ocean West Antarctica |
genre_facet |
Amundsen Sea Antarc* Antarctica Southern Ocean West Antarctica |
op_source |
Frontiers in Microbiology 6 (2015): 1090 doi:10.3389/fmicb.2015.01090 |
op_relation |
https://doi.org/10.3389/fmicb.2015.01090 Frontiers in Microbiology 6 (2015): 1090 https://hdl.handle.net/1912/7667 doi:10.3389/fmicb.2015.01090 |
op_rights |
Attribution 4.0 International http://creativecommons.org/licenses/by/4.0/ |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmicb.2015.01090 |
container_title |
Frontiers in Microbiology |
container_volume |
6 |
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1766375621626167296 |