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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Language: | English |
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Frontiers Media S.A.
2023
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Online Access: | https://doi.org/10.3389/fmars.2023.996275 https://doaj.org/article/2a656ca3415848e79367c4f8d7d7c5ee |
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ftdoajarticles:oai:doaj.org/article:2a656ca3415848e79367c4f8d7d7c5ee 2023-07-30T04:01:41+02:00 Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord Benjamin Paul Mooney Morten Hvitfeldt Iversen Maria Fredrika Norrbin 2023-07-01T00:00:00Z https://doi.org/10.3389/fmars.2023.996275 https://doaj.org/article/2a656ca3415848e79367c4f8d7d7c5ee EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/fmars.2023.996275/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.996275 https://doaj.org/article/2a656ca3415848e79367c4f8d7d7c5ee Frontiers in Marine Science, Vol 10 (2023) marine snow aggregates fjord ecology vertical distribution video plankton recorder flux attenuation Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2023 ftdoajarticles https://doi.org/10.3389/fmars.2023.996275 2023-07-16T00:34:18Z 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 Directory of Open Access Journals: DOAJ Articles Arctic Norway Frontiers in Marine Science 10 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
marine snow aggregates fjord ecology vertical distribution video plankton recorder flux attenuation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
marine snow aggregates fjord ecology vertical distribution video plankton recorder flux attenuation Science Q General. Including nature conservation geographical distribution QH1-199.5 Benjamin Paul Mooney Morten Hvitfeldt Iversen Maria Fredrika Norrbin Impact of Microsetella norvegica on carbon flux attenuation and as a secondary producer during the polar night in the subarctic Porsangerfjord |
topic_facet |
marine snow aggregates fjord ecology vertical distribution video plankton recorder flux attenuation Science Q General. Including nature conservation geographical distribution QH1-199.5 |
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 |
Benjamin Paul Mooney Morten Hvitfeldt Iversen Maria Fredrika Norrbin |
author_facet |
Benjamin Paul Mooney Morten Hvitfeldt Iversen Maria Fredrika Norrbin |
author_sort |
Benjamin Paul Mooney |
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 S.A. |
publishDate |
2023 |
url |
https://doi.org/10.3389/fmars.2023.996275 https://doaj.org/article/2a656ca3415848e79367c4f8d7d7c5ee |
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_source |
Frontiers in Marine Science, Vol 10 (2023) |
op_relation |
https://www.frontiersin.org/articles/10.3389/fmars.2023.996275/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2023.996275 https://doaj.org/article/2a656ca3415848e79367c4f8d7d7c5ee |
op_doi |
https://doi.org/10.3389/fmars.2023.996275 |
container_title |
Frontiers in Marine Science |
container_volume |
10 |
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1772812450513551360 |