Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten)
Time-series observations provide an essential baseline to identify biological responses to environmental fluctuations, and to distinguish natural variability from human impact. Here, we describe for the first time year-round microbial and oceanographic dynamics in the partially ice-covered Fram Stra...
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ftawi:oai:epic.awi.de:53227 2024-09-15T17:51:37+00:00 Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) Wietz, Matthias Metfies, Katja von Appen, Wilken-Jon Torres-Valdes, Sinhue Cardozo, Magda Bienhold, Christina Boetius, Antje 2020 https://epic.awi.de/id/eprint/53227/ https://agu.confex.com/agu/osm20/meetingapp.cgi/Paper/636015 https://hdl.handle.net/10013/epic.9705af78-d2de-4997-8998-aed77d381344 unknown Wietz, M. orcid:0000-0002-9786-3026 , Metfies, K. orcid:0000-0003-3073-8033 , von Appen, W. J. orcid:0000-0002-7200-0099 , Torres-Valdes, S. orcid:0000-0003-2749-4170 , Cardozo, M. , Bienhold, C. orcid:0000-0003-2269-9468 and Boetius, A. orcid:0000-0003-2117-4176 (2020) Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) , Ocean Sciences Meeting, San Diego, USA, 16 February 2020 - 21 February 2020 . hdl:10013/epic.9705af78-d2de-4997-8998-aed77d381344 EPIC3Ocean Sciences Meeting, San Diego, USA, 2020-02-16-2020-02-21 Conference notRev 2020 ftawi 2024-06-24T04:26:11Z Time-series observations provide an essential baseline to identify biological responses to environmental fluctuations, and to distinguish natural variability from human impact. Here, we describe for the first time year-round microbial and oceanographic dynamics in the partially ice-covered Fram Strait (Arctic Ocean) using autonomous samplers deployed as part of the infrastructure program FRAM, allowing unprecedented insights into the marine microbial ecology of the polar night. Bacterial communities showed a strong seasonal signal, especially in the West Spitsbergen Current. Here, distinct temporal succession of phytoplankton and bacterial clades occurred, including covariance of the magnetotactic bacterium Magnetospira with daylight hours. Summer featured weekly variability in blooming taxa, including the flavobacterial genera Formosa and Polaribacter succeeding peaks of the diatoms Thalassiosira and Grammonema. The Bacteroidetes peak in summer was followed by dominance of SAR11 in fall and Nitrosopumilus in winter, suggesting timely controlled ecological roles. Bacterial diversity was highest in winter, featuring elevated abundances of Planctomycetes and Nitrospinia as well as the heterotrophic eukaryote taxa Syndiniales and Radiolaria. Late winter was characterized by increasing proportions of e.g. Dadabacteria before the onset of the productive season. In the ice-covered East Greenland Current (Arctic Ocean outflow), bacterial community structure showed less seasonality. Here, bacterial diversity decreased in response to ice cover dynamics and nitrate availability, underlining that changing ice and light regimes likely impact plankton diversity and biogeochemical processes. Conference Object Arctic Arctic Ocean East Greenland east greenland current Fram Strait Greenland Phytoplankton polar night Spitsbergen Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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Open Polar |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
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unknown |
description |
Time-series observations provide an essential baseline to identify biological responses to environmental fluctuations, and to distinguish natural variability from human impact. Here, we describe for the first time year-round microbial and oceanographic dynamics in the partially ice-covered Fram Strait (Arctic Ocean) using autonomous samplers deployed as part of the infrastructure program FRAM, allowing unprecedented insights into the marine microbial ecology of the polar night. Bacterial communities showed a strong seasonal signal, especially in the West Spitsbergen Current. Here, distinct temporal succession of phytoplankton and bacterial clades occurred, including covariance of the magnetotactic bacterium Magnetospira with daylight hours. Summer featured weekly variability in blooming taxa, including the flavobacterial genera Formosa and Polaribacter succeeding peaks of the diatoms Thalassiosira and Grammonema. The Bacteroidetes peak in summer was followed by dominance of SAR11 in fall and Nitrosopumilus in winter, suggesting timely controlled ecological roles. Bacterial diversity was highest in winter, featuring elevated abundances of Planctomycetes and Nitrospinia as well as the heterotrophic eukaryote taxa Syndiniales and Radiolaria. Late winter was characterized by increasing proportions of e.g. Dadabacteria before the onset of the productive season. In the ice-covered East Greenland Current (Arctic Ocean outflow), bacterial community structure showed less seasonality. Here, bacterial diversity decreased in response to ice cover dynamics and nitrate availability, underlining that changing ice and light regimes likely impact plankton diversity and biogeochemical processes. |
format |
Conference Object |
author |
Wietz, Matthias Metfies, Katja von Appen, Wilken-Jon Torres-Valdes, Sinhue Cardozo, Magda Bienhold, Christina Boetius, Antje |
spellingShingle |
Wietz, Matthias Metfies, Katja von Appen, Wilken-Jon Torres-Valdes, Sinhue Cardozo, Magda Bienhold, Christina Boetius, Antje Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
author_facet |
Wietz, Matthias Metfies, Katja von Appen, Wilken-Jon Torres-Valdes, Sinhue Cardozo, Magda Bienhold, Christina Boetius, Antje |
author_sort |
Wietz, Matthias |
title |
Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
title_short |
Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
title_full |
Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
title_fullStr |
Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
title_full_unstemmed |
Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) |
title_sort |
year-round microbial community dynamics in the arctic ocean (fram strait; lter hausgarten) |
publishDate |
2020 |
url |
https://epic.awi.de/id/eprint/53227/ https://agu.confex.com/agu/osm20/meetingapp.cgi/Paper/636015 https://hdl.handle.net/10013/epic.9705af78-d2de-4997-8998-aed77d381344 |
genre |
Arctic Arctic Ocean East Greenland east greenland current Fram Strait Greenland Phytoplankton polar night Spitsbergen |
genre_facet |
Arctic Arctic Ocean East Greenland east greenland current Fram Strait Greenland Phytoplankton polar night Spitsbergen |
op_source |
EPIC3Ocean Sciences Meeting, San Diego, USA, 2020-02-16-2020-02-21 |
op_relation |
Wietz, M. orcid:0000-0002-9786-3026 , Metfies, K. orcid:0000-0003-3073-8033 , von Appen, W. J. orcid:0000-0002-7200-0099 , Torres-Valdes, S. orcid:0000-0003-2749-4170 , Cardozo, M. , Bienhold, C. orcid:0000-0003-2269-9468 and Boetius, A. orcid:0000-0003-2117-4176 (2020) Year-round Microbial Community Dynamics in the Arctic Ocean (Fram Strait; LTER Hausgarten) , Ocean Sciences Meeting, San Diego, USA, 16 February 2020 - 21 February 2020 . hdl:10013/epic.9705af78-d2de-4997-8998-aed77d381344 |
_version_ |
1810293553520181248 |