Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase
Marine microbial communities have been little studied in Arctic waters, especially during the winter–spring transition before the development of extensive phytoplankton blooms. This study investigated microbial plankton in the ice-covered polar surface waters of the northwestern Fram Strait (75 to 8...
Published in: | Aquatic Microbial Ecology |
---|---|
Main Authors: | , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Inter-Research
2014
|
Subjects: | |
Online Access: | http://hdl.handle.net/1956/5931 https://doi.org/10.3354/ame01525 |
id |
ftunivbergen:oai:bora.uib.no:1956/5931 |
---|---|
record_format |
openpolar |
spelling |
ftunivbergen:oai:bora.uib.no:1956/5931 2023-05-15T14:23:25+02:00 Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase Seuthe, Lena Töpper, Birte Reigstad, Marit Thyrhaug, Runar Vaquer-Sunyer, Raquel 2014-09-20 application/pdf http://hdl.handle.net/1956/5931 https://doi.org/10.3354/ame01525 eng eng Inter-Research Bacterial community structures in the Arctic Ocean: the effect of increased carbon load on nutrient competition and bacterial diversity urn:issn:0948-3055 http://hdl.handle.net/1956/5931 https://doi.org/10.3354/ame01525 Copyright Inter-Research. All rights reserved. Flow cytometry Bacteria Microzooplankton Mixotrophy Planktonic metabolism VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Peer reviewed Journal article 2014 ftunivbergen https://doi.org/10.3354/ame01525 2023-03-14T17:42:32Z Marine microbial communities have been little studied in Arctic waters, especially during the winter–spring transition before the development of extensive phytoplankton blooms. This study investigated microbial plankton in the ice-covered polar surface waters of the northwestern Fram Strait (75 to 80°N) at the onset of the 24 h light period in spring (April to May). The system we encountered was characterised by low concentrations of chlorophyll a (<0.2 μg l−1) and a low abundance of both bacteria (1.4 to 2.5 × 108 cells l−1) and protists (1 to 1.7 × 105 cells l−1). Bacterial production was very low (≤0.63 μg C l−1 d−1), despite the dominance of nucleic-acid-rich bacteria (58 ± 6% of total bacterial abundance). Small (2 to 5 μm) phototrophs dominated the eukaryotic assemblage in the surface and most probably had profound effects on the composition and metabolic balance of the microbial community as a whole. Most stations appeared to have been net-autotrophic, and calculations of phagotrophy indicated a balanced carbon budget for the microbial community. Mixotrophy was seen in a large part of the ciliate assemblage and may have contributed to the productivity and stability of the pre-bloom system that we encountered. publishedVersion Article in Journal/Newspaper Arctic Arctic Fram Strait Phytoplankton University of Bergen: Bergen Open Research Archive (BORA-UiB) Arctic Aquatic Microbial Ecology 64 3 253 266 |
institution |
Open Polar |
collection |
University of Bergen: Bergen Open Research Archive (BORA-UiB) |
op_collection_id |
ftunivbergen |
language |
English |
topic |
Flow cytometry Bacteria Microzooplankton Mixotrophy Planktonic metabolism VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 |
spellingShingle |
Flow cytometry Bacteria Microzooplankton Mixotrophy Planktonic metabolism VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 Seuthe, Lena Töpper, Birte Reigstad, Marit Thyrhaug, Runar Vaquer-Sunyer, Raquel Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
topic_facet |
Flow cytometry Bacteria Microzooplankton Mixotrophy Planktonic metabolism VDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488 |
description |
Marine microbial communities have been little studied in Arctic waters, especially during the winter–spring transition before the development of extensive phytoplankton blooms. This study investigated microbial plankton in the ice-covered polar surface waters of the northwestern Fram Strait (75 to 80°N) at the onset of the 24 h light period in spring (April to May). The system we encountered was characterised by low concentrations of chlorophyll a (<0.2 μg l−1) and a low abundance of both bacteria (1.4 to 2.5 × 108 cells l−1) and protists (1 to 1.7 × 105 cells l−1). Bacterial production was very low (≤0.63 μg C l−1 d−1), despite the dominance of nucleic-acid-rich bacteria (58 ± 6% of total bacterial abundance). Small (2 to 5 μm) phototrophs dominated the eukaryotic assemblage in the surface and most probably had profound effects on the composition and metabolic balance of the microbial community as a whole. Most stations appeared to have been net-autotrophic, and calculations of phagotrophy indicated a balanced carbon budget for the microbial community. Mixotrophy was seen in a large part of the ciliate assemblage and may have contributed to the productivity and stability of the pre-bloom system that we encountered. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Seuthe, Lena Töpper, Birte Reigstad, Marit Thyrhaug, Runar Vaquer-Sunyer, Raquel |
author_facet |
Seuthe, Lena Töpper, Birte Reigstad, Marit Thyrhaug, Runar Vaquer-Sunyer, Raquel |
author_sort |
Seuthe, Lena |
title |
Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
title_short |
Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
title_full |
Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
title_fullStr |
Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
title_full_unstemmed |
Microbial communities and processes in ice-covered Arctic waters of the northwestern Fram Strait (75 to 80° N) during the vernal pre-bloom phase |
title_sort |
microbial communities and processes in ice-covered arctic waters of the northwestern fram strait (75 to 80° n) during the vernal pre-bloom phase |
publisher |
Inter-Research |
publishDate |
2014 |
url |
http://hdl.handle.net/1956/5931 https://doi.org/10.3354/ame01525 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Arctic Fram Strait Phytoplankton |
genre_facet |
Arctic Arctic Fram Strait Phytoplankton |
op_relation |
Bacterial community structures in the Arctic Ocean: the effect of increased carbon load on nutrient competition and bacterial diversity urn:issn:0948-3055 http://hdl.handle.net/1956/5931 https://doi.org/10.3354/ame01525 |
op_rights |
Copyright Inter-Research. All rights reserved. |
op_doi |
https://doi.org/10.3354/ame01525 |
container_title |
Aquatic Microbial Ecology |
container_volume |
64 |
container_issue |
3 |
container_start_page |
253 |
op_container_end_page |
266 |
_version_ |
1766295965908598784 |