Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling
Abstract Iron (Fe) governs the cycling of organic carbon in large parts of the Southern Ocean. The strategies of diverse microbes to acquire the different chemical forms of Fe under seasonally changing organic carbon regimes remain, however, poorly understood. Here, we report high‐resolution seasona...
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Online Access: | http://dx.doi.org/10.1111/1462-2920.16397 |
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crwiley:10.1111/1462-2920.16397 2024-06-02T08:14:42+00:00 Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling Zhang, Rui Debeljak, Pavla Blain, Stephane Obernosterer, Ingrid China Scholarship Council Fondation BNP Paribas Institut Polaire Français Paul Emile Victor 2023 http://dx.doi.org/10.1111/1462-2920.16397 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Environmental Microbiology volume 25, issue 10, page 1816-1829 ISSN 1462-2912 1462-2920 journal-article 2023 crwiley https://doi.org/10.1111/1462-2920.16397 2024-05-06T07:00:46Z Abstract Iron (Fe) governs the cycling of organic carbon in large parts of the Southern Ocean. The strategies of diverse microbes to acquire the different chemical forms of Fe under seasonally changing organic carbon regimes remain, however, poorly understood. Here, we report high‐resolution seasonal metagenomic observations from the region off Kerguelen Island (Indian Sector of the Southern Ocean) where natural Fe‐fertilization induces consecutive spring and summer phytoplankton blooms. Our data illustrate pronounced, but distinct seasonal patterns in the abundance of genes implicated in the transport of different forms of Fe and organic substrates, of siderophore biosynthesis and carbohydrate‐active enzymes. The seasonal dynamics suggest a temporal decoupling in the prokaryotic requirements of Fe and organic carbon during the spring phytoplankton bloom and a concerted access to these resources after the summer bloom. Taxonomic assignments revealed differences in the prokaryotic groups harbouring genes of a given Fe‐related category and pronounced seasonal successions were observed. Using MAGs we could decipher the respective Fe‐ and organic substrate‐related genes of individual taxa assigned to abundant groups. The ecological strategies related to Fe‐acquisition provide insights on how this element could shape microbial community composition with potential implications on organic matter transformations in the Southern Ocean. Article in Journal/Newspaper Southern Ocean Wiley Online Library Indian Kerguelen Kerguelen Island ENVELOPE(69.500,69.500,-49.250,-49.250) Southern Ocean Environmental Microbiology 25 10 1816 1829 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Abstract Iron (Fe) governs the cycling of organic carbon in large parts of the Southern Ocean. The strategies of diverse microbes to acquire the different chemical forms of Fe under seasonally changing organic carbon regimes remain, however, poorly understood. Here, we report high‐resolution seasonal metagenomic observations from the region off Kerguelen Island (Indian Sector of the Southern Ocean) where natural Fe‐fertilization induces consecutive spring and summer phytoplankton blooms. Our data illustrate pronounced, but distinct seasonal patterns in the abundance of genes implicated in the transport of different forms of Fe and organic substrates, of siderophore biosynthesis and carbohydrate‐active enzymes. The seasonal dynamics suggest a temporal decoupling in the prokaryotic requirements of Fe and organic carbon during the spring phytoplankton bloom and a concerted access to these resources after the summer bloom. Taxonomic assignments revealed differences in the prokaryotic groups harbouring genes of a given Fe‐related category and pronounced seasonal successions were observed. Using MAGs we could decipher the respective Fe‐ and organic substrate‐related genes of individual taxa assigned to abundant groups. The ecological strategies related to Fe‐acquisition provide insights on how this element could shape microbial community composition with potential implications on organic matter transformations in the Southern Ocean. |
author2 |
China Scholarship Council Fondation BNP Paribas Institut Polaire Français Paul Emile Victor |
format |
Article in Journal/Newspaper |
author |
Zhang, Rui Debeljak, Pavla Blain, Stephane Obernosterer, Ingrid |
spellingShingle |
Zhang, Rui Debeljak, Pavla Blain, Stephane Obernosterer, Ingrid Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
author_facet |
Zhang, Rui Debeljak, Pavla Blain, Stephane Obernosterer, Ingrid |
author_sort |
Zhang, Rui |
title |
Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
title_short |
Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
title_full |
Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
title_fullStr |
Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
title_full_unstemmed |
Seasonal shifts in Fe‐acquisition strategies in Southern Ocean microbial communities revealed by metagenomics and autonomous sampling |
title_sort |
seasonal shifts in fe‐acquisition strategies in southern ocean microbial communities revealed by metagenomics and autonomous sampling |
publisher |
Wiley |
publishDate |
2023 |
url |
http://dx.doi.org/10.1111/1462-2920.16397 |
long_lat |
ENVELOPE(69.500,69.500,-49.250,-49.250) |
geographic |
Indian Kerguelen Kerguelen Island Southern Ocean |
geographic_facet |
Indian Kerguelen Kerguelen Island Southern Ocean |
genre |
Southern Ocean |
genre_facet |
Southern Ocean |
op_source |
Environmental Microbiology volume 25, issue 10, page 1816-1829 ISSN 1462-2912 1462-2920 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/1462-2920.16397 |
container_title |
Environmental Microbiology |
container_volume |
25 |
container_issue |
10 |
container_start_page |
1816 |
op_container_end_page |
1829 |
_version_ |
1800738662733840384 |