Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N)
The Arctic is impacted by climate warming faster than any other oceanic region on Earth. Assessing the baseline of microbial communities in this rapidly changing ecosystem is vital for understanding the implications of ocean warming and sea ice retreat on ecosystem functioning. Using CARD-FISH and s...
Published in: | Frontiers in Microbiology |
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Online Access: | http://dx.doi.org/10.3389/fmicb.2021.658803 https://www.frontiersin.org/articles/10.3389/fmicb.2021.658803/full |
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crfrontiers:10.3389/fmicb.2021.658803 2024-09-15T17:54:13+00:00 Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) Cardozo-Mino, Magda G. Fadeev, Eduard Salman-Carvalho, Verena Boetius, Antje European Research Council Helmholtz Association Max-Planck-Gesellschaft Hector Fellow Academy Austrian Science Fund 2021 http://dx.doi.org/10.3389/fmicb.2021.658803 https://www.frontiersin.org/articles/10.3389/fmicb.2021.658803/full unknown Frontiers Media SA https://creativecommons.org/licenses/by/4.0/ Frontiers in Microbiology volume 12 ISSN 1664-302X journal-article 2021 crfrontiers https://doi.org/10.3389/fmicb.2021.658803 2024-07-23T04:03:33Z The Arctic is impacted by climate warming faster than any other oceanic region on Earth. Assessing the baseline of microbial communities in this rapidly changing ecosystem is vital for understanding the implications of ocean warming and sea ice retreat on ecosystem functioning. Using CARD-FISH and semi-automated counting, we quantified 14 ecologically relevant taxonomic groups of bacterioplankton ( Bacteria and Archaea ) from surface (0–30 m) down to deep waters (2,500 m) in summer ice-covered and ice-free regions of the Fram Strait, the main gateway for Atlantic inflow into the Arctic Ocean. Cell abundances of the bacterioplankton communities in surface waters varied from 10 5 cells mL –1 in ice-covered regions to 10 6 cells mL –1 in the ice-free regions. Observations suggest that these were overall driven by variations in phytoplankton bloom conditions across the Strait. The bacterial groups Bacteroidetes and Gammaproteobacteria showed several-fold higher cell abundances under late phytoplankton bloom conditions of the ice-free regions. Other taxonomic groups, such as the Rhodobacteraceae , revealed a distinct association of cell abundances with the surface Atlantic waters. With increasing depth (>500 m), the total cell abundances of the bacterioplankton communities decreased by up to two orders of magnitude, while largely unknown taxonomic groups (e.g., SAR324 and SAR202 clades) maintained constant cell abundances throughout the entire water column (ca. 10 3 cells mL –1 ). This suggests that these enigmatic groups may occupy a specific ecological niche in the entire water column. Our results provide the first quantitative spatial variations assessment of bacterioplankton in the summer ice-covered and ice-free Arctic water column, and suggest that further shift toward ice-free Arctic summers with longer phytoplankton blooms can lead to major changes in the associated standing stock of the bacterioplankton communities. Article in Journal/Newspaper Arctic Ocean Fram Strait Phytoplankton Sea ice Frontiers (Publisher) Frontiers in Microbiology 12 |
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Frontiers (Publisher) |
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The Arctic is impacted by climate warming faster than any other oceanic region on Earth. Assessing the baseline of microbial communities in this rapidly changing ecosystem is vital for understanding the implications of ocean warming and sea ice retreat on ecosystem functioning. Using CARD-FISH and semi-automated counting, we quantified 14 ecologically relevant taxonomic groups of bacterioplankton ( Bacteria and Archaea ) from surface (0–30 m) down to deep waters (2,500 m) in summer ice-covered and ice-free regions of the Fram Strait, the main gateway for Atlantic inflow into the Arctic Ocean. Cell abundances of the bacterioplankton communities in surface waters varied from 10 5 cells mL –1 in ice-covered regions to 10 6 cells mL –1 in the ice-free regions. Observations suggest that these were overall driven by variations in phytoplankton bloom conditions across the Strait. The bacterial groups Bacteroidetes and Gammaproteobacteria showed several-fold higher cell abundances under late phytoplankton bloom conditions of the ice-free regions. Other taxonomic groups, such as the Rhodobacteraceae , revealed a distinct association of cell abundances with the surface Atlantic waters. With increasing depth (>500 m), the total cell abundances of the bacterioplankton communities decreased by up to two orders of magnitude, while largely unknown taxonomic groups (e.g., SAR324 and SAR202 clades) maintained constant cell abundances throughout the entire water column (ca. 10 3 cells mL –1 ). This suggests that these enigmatic groups may occupy a specific ecological niche in the entire water column. Our results provide the first quantitative spatial variations assessment of bacterioplankton in the summer ice-covered and ice-free Arctic water column, and suggest that further shift toward ice-free Arctic summers with longer phytoplankton blooms can lead to major changes in the associated standing stock of the bacterioplankton communities. |
author2 |
European Research Council Helmholtz Association Max-Planck-Gesellschaft Hector Fellow Academy Austrian Science Fund |
format |
Article in Journal/Newspaper |
author |
Cardozo-Mino, Magda G. Fadeev, Eduard Salman-Carvalho, Verena Boetius, Antje |
spellingShingle |
Cardozo-Mino, Magda G. Fadeev, Eduard Salman-Carvalho, Verena Boetius, Antje Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
author_facet |
Cardozo-Mino, Magda G. Fadeev, Eduard Salman-Carvalho, Verena Boetius, Antje |
author_sort |
Cardozo-Mino, Magda G. |
title |
Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
title_short |
Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
title_full |
Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
title_fullStr |
Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
title_full_unstemmed |
Spatial Distribution of Arctic Bacterioplankton Abundance Is Linked to Distinct Water Masses and Summertime Phytoplankton Bloom Dynamics (Fram Strait, 79�N) |
title_sort |
spatial distribution of arctic bacterioplankton abundance is linked to distinct water masses and summertime phytoplankton bloom dynamics (fram strait, 79�n) |
publisher |
Frontiers Media SA |
publishDate |
2021 |
url |
http://dx.doi.org/10.3389/fmicb.2021.658803 https://www.frontiersin.org/articles/10.3389/fmicb.2021.658803/full |
genre |
Arctic Ocean Fram Strait Phytoplankton Sea ice |
genre_facet |
Arctic Ocean Fram Strait Phytoplankton Sea ice |
op_source |
Frontiers in Microbiology volume 12 ISSN 1664-302X |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/fmicb.2021.658803 |
container_title |
Frontiers in Microbiology |
container_volume |
12 |
_version_ |
1810430453197307904 |