Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord
It is known that Microsetella norvegica feed on phytoplankton and provide an important link to higher trophic levels in Arctic fjords, such as fish sprat (Sprattus sprattus) and three-spined stickleback (Gasterosteus aculeatus). It has recently been suggested that M. norvegica may also contribute su...
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Online Access: | https://hdl.handle.net/10037/30123 https://doi.org/10.3389/fmars.2023.996275 |
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ftunivtroemsoe:oai:munin.uit.no:10037/30123 2023-09-05T13:17:19+02:00 Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord Mooney, Benjamin Paul Iversen, Morten Hvitfeldt Norrbin, Fredrika 2023-07-13 https://hdl.handle.net/10037/30123 https://doi.org/10.3389/fmars.2023.996275 eng eng Frontiers Media Frontiers in Marine Science Framsenteret: Pelagic ecosystems in ice-covered and ice-free fjords 2014-7 Mooney, Iversen, Norrbin MF. Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord. Frontiers in Marine Science. 2023;10 FRIDAID 2167924 doi:10.3389/fmars.2023.996275 2296-7745 https://hdl.handle.net/10037/30123 Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2023 ftunivtroemsoe https://doi.org/10.3389/fmars.2023.996275 2023-08-23T23:07:15Z It is known that Microsetella norvegica feed on phytoplankton and provide an important link to higher trophic levels in Arctic fjords, such as fish sprat (Sprattus sprattus) and three-spined stickleback (Gasterosteus aculeatus). It has recently been suggested that M. norvegica may also contribute substantially to carbon flux attenuation during periods of high abundance. However, we still know very little about how seasonal variations in abundance and vertical distribution of M. norvegica impact the efficiency of the biological carbon pump in Arctic fjords. We investigated the role of Microsetella norvegica, a small harpacticoid copepod, for particulate organic carbon flux attenuation via aggregate feeding in a subarctic fjord. We quantified the vertical distribution and abundance of M. norvegica, phytoplankton, and marine snow simultaneously with a Digital Autonomous Video Plankton Recorder in Porsangerfjord, northern Norway, between August 2013 and November 2014. We estimated the highest abundance of M. norvegica as 4.86x106 individuals m-2 in October. Our results suggest that M. norvegica preferred diatoms over both marine snow and the prymnesiophyte Phaeocystis pouchetii during euphotic bloom conditions. However, during oligotrophic conditions when phytoplankton were scarce, M. norvegica switched to marine snow as a food source. M. norvegica has the potential to explain 1.4% and 0.29% of the total carbon flux attenuation in October and November, respectively. These results suggest that small copepods feed on settling detritus when no alternative food is available. Detritus feeding by M. norvegica may have an ecological impact during the polar night, both via direct carbon flux attenuation, but also as secondary producers in periods with low primary production. Currently small copepods such as M. norvegica are not included in carbon budgets or large-scale modelling, but considering their potentially high abundance they may represent an important but overlooked pathway in both the carbon cycle and trophic level ... Article in Journal/Newspaper Arctic Northern Norway Phytoplankton polar night Subarctic Copepods University of Tromsø: Munin Open Research Archive Arctic Norway Frontiers in Marine Science 10 |
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Open Polar |
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University of Tromsø: Munin Open Research Archive |
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ftunivtroemsoe |
language |
English |
description |
It is known that Microsetella norvegica feed on phytoplankton and provide an important link to higher trophic levels in Arctic fjords, such as fish sprat (Sprattus sprattus) and three-spined stickleback (Gasterosteus aculeatus). It has recently been suggested that M. norvegica may also contribute substantially to carbon flux attenuation during periods of high abundance. However, we still know very little about how seasonal variations in abundance and vertical distribution of M. norvegica impact the efficiency of the biological carbon pump in Arctic fjords. We investigated the role of Microsetella norvegica, a small harpacticoid copepod, for particulate organic carbon flux attenuation via aggregate feeding in a subarctic fjord. We quantified the vertical distribution and abundance of M. norvegica, phytoplankton, and marine snow simultaneously with a Digital Autonomous Video Plankton Recorder in Porsangerfjord, northern Norway, between August 2013 and November 2014. We estimated the highest abundance of M. norvegica as 4.86x106 individuals m-2 in October. Our results suggest that M. norvegica preferred diatoms over both marine snow and the prymnesiophyte Phaeocystis pouchetii during euphotic bloom conditions. However, during oligotrophic conditions when phytoplankton were scarce, M. norvegica switched to marine snow as a food source. M. norvegica has the potential to explain 1.4% and 0.29% of the total carbon flux attenuation in October and November, respectively. These results suggest that small copepods feed on settling detritus when no alternative food is available. Detritus feeding by M. norvegica may have an ecological impact during the polar night, both via direct carbon flux attenuation, but also as secondary producers in periods with low primary production. Currently small copepods such as M. norvegica are not included in carbon budgets or large-scale modelling, but considering their potentially high abundance they may represent an important but overlooked pathway in both the carbon cycle and trophic level ... |
format |
Article in Journal/Newspaper |
author |
Mooney, Benjamin Paul Iversen, Morten Hvitfeldt Norrbin, Fredrika |
spellingShingle |
Mooney, Benjamin Paul Iversen, Morten Hvitfeldt Norrbin, Fredrika Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
author_facet |
Mooney, Benjamin Paul Iversen, Morten Hvitfeldt Norrbin, Fredrika |
author_sort |
Mooney, Benjamin Paul |
title |
Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
title_short |
Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
title_full |
Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
title_fullStr |
Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
title_full_unstemmed |
Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
title_sort |
impact of microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic porsangerfjord |
publisher |
Frontiers Media |
publishDate |
2023 |
url |
https://hdl.handle.net/10037/30123 https://doi.org/10.3389/fmars.2023.996275 |
geographic |
Arctic Norway |
geographic_facet |
Arctic Norway |
genre |
Arctic Northern Norway Phytoplankton polar night Subarctic Copepods |
genre_facet |
Arctic Northern Norway Phytoplankton polar night Subarctic Copepods |
op_relation |
Frontiers in Marine Science Framsenteret: Pelagic ecosystems in ice-covered and ice-free fjords 2014-7 Mooney, Iversen, Norrbin MF. Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord. Frontiers in Marine Science. 2023;10 FRIDAID 2167924 doi:10.3389/fmars.2023.996275 2296-7745 https://hdl.handle.net/10037/30123 |
op_rights |
Attribution 4.0 International (CC BY 4.0) openAccess Copyright 2023 The Author(s) https://creativecommons.org/licenses/by/4.0 |
op_doi |
https://doi.org/10.3389/fmars.2023.996275 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1776198537281798144 |