Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling

We used inverse modeling to reconstruct major planktonic food web carbon flows in the Atlantic Water inflow, east and north of Svalbard during spring (18-25 May) and summer (9-13 August), 2014. The model was based on three intensively sampled stations during both periods, corresponding to early, pea...

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Autores: Olli, Kalle, Halvorsen, Elisabeth, Vernet, María, Lavrentyev, Peter J., Franzè, Gayantonia, Sanz-Martín, Marina, Paulsen, Maria Lund, Reigstad, Marit
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2019
País:España
Institución:Consejo Superior de Investigaciones Científicas (CSIC)
Repositorio:DIGITAL.CSIC. Repositorio Institucional del CSIC
OAI Identifier:oai:digital.csic.es:10261/202839
Acceso en línea:http://hdl.handle.net/10261/202839
Access Level:acceso abierto
Palabra clave:carbon flow
Food web
inverse method
Arctic Ocean
plankton communities
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spelling Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modelingOlli, KalleHalvorsen, ElisabethVernet, MaríaLavrentyev, Peter J.Franzè, GayantoniaSanz-Martín, MarinaPaulsen, Maria LundReigstad, Maritcarbon flowFood webinverse methodArctic Oceanplankton communitiesWe used inverse modeling to reconstruct major planktonic food web carbon flows in the Atlantic Water inflow, east and north of Svalbard during spring (18-25 May) and summer (9-13 August), 2014. The model was based on three intensively sampled stations during both periods, corresponding to early, peak, and decline phases of a Phaeocystis and diatom dominated bloom (May), and flagellates dominated post bloom stages (August). The food web carbon flows were driven by primary production (290-2,850 mg C m d-1), which was channeled through a network of planktonic compartments, and ultimately respired (180-1200 mg C m d), settled out of the euphotic zone as organic particles (145-530 mg C m d), or accumulated in the water column in various organic pools. The accumulation of dissolved organic carbon was intense (1070 mg C m d) during the early bloom stage, slowed down during the bloom peak (400 mg C m d), and remained low during the rest of the season. The heterotrophic bacteria responded swiftly to the massive release of new DOC by high but decreasing carbon assimilation rates (from 534 to 330 mg C m d) in May. The net bacterial production was low during the early and peak bloom (26-31 mg C m d) but increased in the late and post bloom phases ( > 50 mg C m d). The heterotrophic nanoflagellates did not respond predictably to the different bloom phases, with relatively modest carbon uptake, 30-170 mg C m d. In contrast, microzooplankton increased food intake from 160 to 380 mg C m d during the buildup and decline phases, and highly variable carbon intake 46-624 mg C m d, during post bloom phases. Mesozooplankton had an initially high but decreasing carbon uptake in May (220-48 mg C m d), followed by highly variable carbon consumption during the post bloom stages (40-190 mg C m d). Both, micro- and mesozooplankton shifted from almost pure herbivory (92-97% of total food intake) during the early bloom phase to an herbivorous, detritovorous and carnivorous mixed diet as the season progressed. Our results indicate a temporal decoupling between the microbial and zooplankton dominated heterotrophic carbon flows during the course of the bloom in a highly productive Atlantic gateway to the Arctic Ocean.This work was funded by the Estonian Research Council (Grant 1574P), and the Norwegian Research Council through the project CarbonBridge (Project Number 226415).Frontiers MediaEstonian Research CouncilNorwegian Research CouncilConsejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]2020202020192020info:eu-repo/semantics/articlehttp://purl.org/coar/resource_type/c_6501Publisher's versioninfo:eu-repo/semantics/publishedVersionhttp://hdl.handle.net/10261/202839reponame:DIGITAL.CSIC. Repositorio Institucional del CSICinstname:Consejo Superior de Investigaciones Científicas (CSIC)Ingléshttp://doi.org/10.3389/fmars.2019.244Síinfo:eu-repo/semantics/openAccessoai:digital.csic.es:10261/2028392026-05-22T06:33:51Z
dc.title.none.fl_str_mv Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
title Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
spellingShingle Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
Olli, Kalle
carbon flow
Food web
inverse method
Arctic Ocean
plankton communities
title_short Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
title_full Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
title_fullStr Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
title_full_unstemmed Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
title_sort Food web functions and interactions during spring and summer in the arctic water inflow region: Investigated through inverse modeling
dc.creator.none.fl_str_mv Olli, Kalle
Halvorsen, Elisabeth
Vernet, María
Lavrentyev, Peter J.
Franzè, Gayantonia
Sanz-Martín, Marina
Paulsen, Maria Lund
Reigstad, Marit
author Olli, Kalle
author_facet Olli, Kalle
Halvorsen, Elisabeth
Vernet, María
Lavrentyev, Peter J.
Franzè, Gayantonia
Sanz-Martín, Marina
Paulsen, Maria Lund
Reigstad, Marit
author_role author
author2 Halvorsen, Elisabeth
Vernet, María
Lavrentyev, Peter J.
Franzè, Gayantonia
Sanz-Martín, Marina
Paulsen, Maria Lund
Reigstad, Marit
author2_role author
author
author
author
author
author
author
dc.contributor.none.fl_str_mv Estonian Research Council
Norwegian Research Council
Consejo Superior de Investigaciones Científicas [https://ror.org/02gfc7t72]
dc.subject.none.fl_str_mv carbon flow
Food web
inverse method
Arctic Ocean
plankton communities
topic carbon flow
Food web
inverse method
Arctic Ocean
plankton communities
description We used inverse modeling to reconstruct major planktonic food web carbon flows in the Atlantic Water inflow, east and north of Svalbard during spring (18-25 May) and summer (9-13 August), 2014. The model was based on three intensively sampled stations during both periods, corresponding to early, peak, and decline phases of a Phaeocystis and diatom dominated bloom (May), and flagellates dominated post bloom stages (August). The food web carbon flows were driven by primary production (290-2,850 mg C m d-1), which was channeled through a network of planktonic compartments, and ultimately respired (180-1200 mg C m d), settled out of the euphotic zone as organic particles (145-530 mg C m d), or accumulated in the water column in various organic pools. The accumulation of dissolved organic carbon was intense (1070 mg C m d) during the early bloom stage, slowed down during the bloom peak (400 mg C m d), and remained low during the rest of the season. The heterotrophic bacteria responded swiftly to the massive release of new DOC by high but decreasing carbon assimilation rates (from 534 to 330 mg C m d) in May. The net bacterial production was low during the early and peak bloom (26-31 mg C m d) but increased in the late and post bloom phases ( > 50 mg C m d). The heterotrophic nanoflagellates did not respond predictably to the different bloom phases, with relatively modest carbon uptake, 30-170 mg C m d. In contrast, microzooplankton increased food intake from 160 to 380 mg C m d during the buildup and decline phases, and highly variable carbon intake 46-624 mg C m d, during post bloom phases. Mesozooplankton had an initially high but decreasing carbon uptake in May (220-48 mg C m d), followed by highly variable carbon consumption during the post bloom stages (40-190 mg C m d). Both, micro- and mesozooplankton shifted from almost pure herbivory (92-97% of total food intake) during the early bloom phase to an herbivorous, detritovorous and carnivorous mixed diet as the season progressed. Our results indicate a temporal decoupling between the microbial and zooplankton dominated heterotrophic carbon flows during the course of the bloom in a highly productive Atlantic gateway to the Arctic Ocean.
publishDate 2019
dc.date.none.fl_str_mv 2019
2020
2020
2020
dc.type.none.fl_str_mv info:eu-repo/semantics/article
http://purl.org/coar/resource_type/c_6501
Publisher's version
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/10261/202839
url http://hdl.handle.net/10261/202839
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv http://doi.org/10.3389/fmars.2019.244
Sí
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Frontiers Media
publisher.none.fl_str_mv Frontiers Media
dc.source.none.fl_str_mv reponame:DIGITAL.CSIC. Repositorio Institucional del CSIC
instname:Consejo Superior de Investigaciones Científicas (CSIC)
instname_str Consejo Superior de Investigaciones Científicas (CSIC)
reponame_str DIGITAL.CSIC. Repositorio Institucional del CSIC
collection DIGITAL.CSIC. Repositorio Institucional del CSIC
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,811543

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