Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012
The ecosystem role of Arctic microbial communities is still largely unknown. Based on a time-series study at the IsA station (West Spitsbergen), the seasonality and contribution of pelagic protists to the vertical flux was investigated at 7 time points during 2011−2012. The hydrography of this high-...
Published in: | Aquatic Microbial Ecology |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2019
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Online Access: | https://pure.uhi.ac.uk/en/publications/5fc645c6-35d8-4d2a-b2c9-6f8ca95226ed https://doi.org/10.3354/ame01904 |
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ftuhipublicatio:oai:pure.atira.dk:publications/5fc645c6-35d8-4d2a-b2c9-6f8ca95226ed 2024-01-28T09:57:59+01:00 Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 Marquardt, Miriam Skogseth, Ragnheid Wiedmann, Ingrid Vader, Anna Reigstad, Marit Cottier, Finlo Gabrielsen, Tove M. 2019-06-06 https://pure.uhi.ac.uk/en/publications/5fc645c6-35d8-4d2a-b2c9-6f8ca95226ed https://doi.org/10.3354/ame01904 eng eng info:eu-repo/semantics/closedAccess Marquardt , M , Skogseth , R , Wiedmann , I , Vader , A , Reigstad , M , Cottier , F & Gabrielsen , T M 2019 , ' Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 ' , Aquatic Microbial Ecology , vol. 83 , pp. 65-82 . https://doi.org/10.3354/ame01904 Next-generation sequencing Vertical flux of protists Time-series Size-fractionated protists Short-time sediment traps Atlantic-influenced Arctic fjord article 2019 ftuhipublicatio https://doi.org/10.3354/ame01904 2024-01-04T23:21:12Z The ecosystem role of Arctic microbial communities is still largely unknown. Based on a time-series study at the IsA station (West Spitsbergen), the seasonality and contribution of pelagic protists to the vertical flux was investigated at 7 time points during 2011−2012. The hydrography of this high-Arctic fjord was evaluated to identify impacts on the community composition during the different seasons. Protists (<10 µm and >10 µm) were sampled at 4 depths from the water column and from short-time sediment traps, and investigated by 454 next-generation sequencing of the V4 region of the 18S ribosomal DNA. An advective event during winter, ex - changing the cold and less saline water mass with warmer and saline Atlantic Water, was potentially responsible for an abrupt shift in the protist composition in March. Small cells (<10 µm) contributed significantly to the vertical flux during autumn and winter, while larger bloom taxa (e.g. diatoms) predominated the water and traps during spring. Parasitic species, such as MALV 1a and Chytriodinium sp., were also detected in the traps, possibly being transported along with their hosts. Vertical export of Arctic pelagic protists is not limited to the productive period; however, the contribution of small taxa that are important contributors in this study seems to be seasonally influenced and may alter the flux efficiency. Molecular tools revealed new taxa contributing to the vertical export, but also identified new potential mechanisms exemplified by parasite-hostinduced transport, spurring increased attention onto parasitism in the study of carbon cycles and vertical flux. Article in Journal/Newspaper Adventfjorden Arctic Arctic Spitsbergen University of the Highlands and Islands: Research Database of UHI Adventfjorden ENVELOPE(15.515,15.515,78.258,78.258) Arctic Aquatic Microbial Ecology 83 1 65 82 |
institution |
Open Polar |
collection |
University of the Highlands and Islands: Research Database of UHI |
op_collection_id |
ftuhipublicatio |
language |
English |
topic |
Next-generation sequencing Vertical flux of protists Time-series Size-fractionated protists Short-time sediment traps Atlantic-influenced Arctic fjord |
spellingShingle |
Next-generation sequencing Vertical flux of protists Time-series Size-fractionated protists Short-time sediment traps Atlantic-influenced Arctic fjord Marquardt, Miriam Skogseth, Ragnheid Wiedmann, Ingrid Vader, Anna Reigstad, Marit Cottier, Finlo Gabrielsen, Tove M. Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
topic_facet |
Next-generation sequencing Vertical flux of protists Time-series Size-fractionated protists Short-time sediment traps Atlantic-influenced Arctic fjord |
description |
The ecosystem role of Arctic microbial communities is still largely unknown. Based on a time-series study at the IsA station (West Spitsbergen), the seasonality and contribution of pelagic protists to the vertical flux was investigated at 7 time points during 2011−2012. The hydrography of this high-Arctic fjord was evaluated to identify impacts on the community composition during the different seasons. Protists (<10 µm and >10 µm) were sampled at 4 depths from the water column and from short-time sediment traps, and investigated by 454 next-generation sequencing of the V4 region of the 18S ribosomal DNA. An advective event during winter, ex - changing the cold and less saline water mass with warmer and saline Atlantic Water, was potentially responsible for an abrupt shift in the protist composition in March. Small cells (<10 µm) contributed significantly to the vertical flux during autumn and winter, while larger bloom taxa (e.g. diatoms) predominated the water and traps during spring. Parasitic species, such as MALV 1a and Chytriodinium sp., were also detected in the traps, possibly being transported along with their hosts. Vertical export of Arctic pelagic protists is not limited to the productive period; however, the contribution of small taxa that are important contributors in this study seems to be seasonally influenced and may alter the flux efficiency. Molecular tools revealed new taxa contributing to the vertical export, but also identified new potential mechanisms exemplified by parasite-hostinduced transport, spurring increased attention onto parasitism in the study of carbon cycles and vertical flux. |
format |
Article in Journal/Newspaper |
author |
Marquardt, Miriam Skogseth, Ragnheid Wiedmann, Ingrid Vader, Anna Reigstad, Marit Cottier, Finlo Gabrielsen, Tove M. |
author_facet |
Marquardt, Miriam Skogseth, Ragnheid Wiedmann, Ingrid Vader, Anna Reigstad, Marit Cottier, Finlo Gabrielsen, Tove M. |
author_sort |
Marquardt, Miriam |
title |
Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
title_short |
Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
title_full |
Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
title_fullStr |
Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
title_full_unstemmed |
Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 |
title_sort |
vertical export of marine pelagic protists in an ice-free high-arctic fjord (adventfjorden, west spitsbergen) throughout 2011-2012 |
publishDate |
2019 |
url |
https://pure.uhi.ac.uk/en/publications/5fc645c6-35d8-4d2a-b2c9-6f8ca95226ed https://doi.org/10.3354/ame01904 |
long_lat |
ENVELOPE(15.515,15.515,78.258,78.258) |
geographic |
Adventfjorden Arctic |
geographic_facet |
Adventfjorden Arctic |
genre |
Adventfjorden Arctic Arctic Spitsbergen |
genre_facet |
Adventfjorden Arctic Arctic Spitsbergen |
op_source |
Marquardt , M , Skogseth , R , Wiedmann , I , Vader , A , Reigstad , M , Cottier , F & Gabrielsen , T M 2019 , ' Vertical export of marine pelagic protists in an ice-free high-Arctic fjord (Adventfjorden, West Spitsbergen) throughout 2011-2012 ' , Aquatic Microbial Ecology , vol. 83 , pp. 65-82 . https://doi.org/10.3354/ame01904 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.3354/ame01904 |
container_title |
Aquatic Microbial Ecology |
container_volume |
83 |
container_issue |
1 |
container_start_page |
65 |
op_container_end_page |
82 |
_version_ |
1789332466210701312 |