Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay
Abstract Phytoplankton under-ice blooms have been recently recognized as an important Arctic phenomenon for global primary production and biogeochemical cycling. Drastic sea-ice decline in both extension and thickness enables the development of early blooms, sometimes hundreds of kilometers beneath...
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ftinsu:oai:HAL:hal-03971949v1 2024-04-14T08:06:44+00:00 Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay Ribeiro, Catherine Gérikas dos Santos, Adriana Lopes Trefault, Nicole Marie, Dominique Lovejoy, Connie Vaulot, Daniel Adaptation et diversité en milieu marin (ADMM) Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff = Roscoff Marine Station (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2023-02-03 https://hal.science/hal-03971949 https://doi.org/10.1101/2022.03.14.484350 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1101/2022.03.14.484350 hal-03971949 https://hal.science/hal-03971949 BIORXIV: 2022.03.14.484350 doi:10.1101/2022.03.14.484350 https://hal.science/hal-03971949 2023 [SDE]Environmental Sciences info:eu-repo/semantics/preprint Preprints, Working Papers, . 2023 ftinsu https://doi.org/10.1101/2022.03.14.484350 2024-03-21T17:09:34Z Abstract Phytoplankton under-ice blooms have been recently recognized as an important Arctic phenomenon for global primary production and biogeochemical cycling. Drastic sea-ice decline in both extension and thickness enables the development of early blooms, sometimes hundreds of kilometers beneath the pack ice. Baffin Bay is a semi-enclosed sea where Arctic and North Atlantic water masses interact. It is totally covered by sea-ice by March and ice-free by August/September. In the present work, we investigated the phytoplankton community structure across the marginal ice zone between the ice-free, Atlantic-influenced, east and the ice-covered, Arctic-influenced, west Baffin Bay using 18S rRNA high-throughput amplicon sequencing, flow cytometry cell counting and numerous environmental and biological data collected and compiled in the scope of the Green Edge project. Sampling was performed during June-July 2016 in a total of 16 stations with around 6 depths each. Stations were clustered into “Under Ice” (UI), “Marginal Ice Zone” (MIZ) and “Open Water” (OW) on the basis of its sea ice cover upon sampling. Phytoplankton community structure was analyzed by 18S rRNA metabarcoding with the microdiversity approach. The UI sector was characterized by a shallow nitracline, high pico-phytoplankton abundance and a shared dominance between Micromonas and Phaeocystis in the 0.2-3 µ m size fraction, as well as an increased contribution of Cryptophyceae and non-diatom Ochrophyta in the 3-20 µ m size fraction. Several amplicon sequence variants (ASVs) were flagged as indicator for the UI+MIZ sector group, including known ice-associated taxa such as the diatoms Melosira arctica and Pseudo-nitzschia seriata , but also specific ASVs assigned to the green alga Micromonas polaris and the cryptophyte Falcomonas daucoides , the silicoflagellate Dictyocha speculum , one member of the uncultivated MOCH-2 group, and a Pterosperma sp. (green algae) rarely seen in other metabarcoding datasets, including from the Arctic. The OW sector ... Report Arctic Baffin Bay Baffin Bay Baffin North Atlantic Phytoplankton Sea ice Institut national des sciences de l'Univers: HAL-INSU Arctic Baffin Bay High Pico ENVELOPE(-63.300,-63.300,-64.680,-64.680) |
institution |
Open Polar |
collection |
Institut national des sciences de l'Univers: HAL-INSU |
op_collection_id |
ftinsu |
language |
English |
topic |
[SDE]Environmental Sciences |
spellingShingle |
[SDE]Environmental Sciences Ribeiro, Catherine Gérikas dos Santos, Adriana Lopes Trefault, Nicole Marie, Dominique Lovejoy, Connie Vaulot, Daniel Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
topic_facet |
[SDE]Environmental Sciences |
description |
Abstract Phytoplankton under-ice blooms have been recently recognized as an important Arctic phenomenon for global primary production and biogeochemical cycling. Drastic sea-ice decline in both extension and thickness enables the development of early blooms, sometimes hundreds of kilometers beneath the pack ice. Baffin Bay is a semi-enclosed sea where Arctic and North Atlantic water masses interact. It is totally covered by sea-ice by March and ice-free by August/September. In the present work, we investigated the phytoplankton community structure across the marginal ice zone between the ice-free, Atlantic-influenced, east and the ice-covered, Arctic-influenced, west Baffin Bay using 18S rRNA high-throughput amplicon sequencing, flow cytometry cell counting and numerous environmental and biological data collected and compiled in the scope of the Green Edge project. Sampling was performed during June-July 2016 in a total of 16 stations with around 6 depths each. Stations were clustered into “Under Ice” (UI), “Marginal Ice Zone” (MIZ) and “Open Water” (OW) on the basis of its sea ice cover upon sampling. Phytoplankton community structure was analyzed by 18S rRNA metabarcoding with the microdiversity approach. The UI sector was characterized by a shallow nitracline, high pico-phytoplankton abundance and a shared dominance between Micromonas and Phaeocystis in the 0.2-3 µ m size fraction, as well as an increased contribution of Cryptophyceae and non-diatom Ochrophyta in the 3-20 µ m size fraction. Several amplicon sequence variants (ASVs) were flagged as indicator for the UI+MIZ sector group, including known ice-associated taxa such as the diatoms Melosira arctica and Pseudo-nitzschia seriata , but also specific ASVs assigned to the green alga Micromonas polaris and the cryptophyte Falcomonas daucoides , the silicoflagellate Dictyocha speculum , one member of the uncultivated MOCH-2 group, and a Pterosperma sp. (green algae) rarely seen in other metabarcoding datasets, including from the Arctic. The OW sector ... |
author2 |
Adaptation et diversité en milieu marin (ADMM) Institut national des sciences de l'Univers (INSU - CNRS)-Station biologique de Roscoff = Roscoff Marine Station (SBR) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Report |
author |
Ribeiro, Catherine Gérikas dos Santos, Adriana Lopes Trefault, Nicole Marie, Dominique Lovejoy, Connie Vaulot, Daniel |
author_facet |
Ribeiro, Catherine Gérikas dos Santos, Adriana Lopes Trefault, Nicole Marie, Dominique Lovejoy, Connie Vaulot, Daniel |
author_sort |
Ribeiro, Catherine Gérikas |
title |
Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
title_short |
Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
title_full |
Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
title_fullStr |
Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
title_full_unstemmed |
Arctic phytoplankton spring bloom diversity across the marginal ice zone in Baffin Bay |
title_sort |
arctic phytoplankton spring bloom diversity across the marginal ice zone in baffin bay |
publisher |
HAL CCSD |
publishDate |
2023 |
url |
https://hal.science/hal-03971949 https://doi.org/10.1101/2022.03.14.484350 |
long_lat |
ENVELOPE(-63.300,-63.300,-64.680,-64.680) |
geographic |
Arctic Baffin Bay High Pico |
geographic_facet |
Arctic Baffin Bay High Pico |
genre |
Arctic Baffin Bay Baffin Bay Baffin North Atlantic Phytoplankton Sea ice |
genre_facet |
Arctic Baffin Bay Baffin Bay Baffin North Atlantic Phytoplankton Sea ice |
op_source |
https://hal.science/hal-03971949 2023 |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1101/2022.03.14.484350 hal-03971949 https://hal.science/hal-03971949 BIORXIV: 2022.03.14.484350 doi:10.1101/2022.03.14.484350 |
op_doi |
https://doi.org/10.1101/2022.03.14.484350 |
_version_ |
1796303864232673280 |