Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay
Despite their wide use in past sea-ice reconstructions, the seasonal, habitat and species-based sources of sedimentary sea-ice proxies are poorly understood. Here, we conduct direct observations of the community composition of diatoms, dinoflagellate cysts and highly branched isoprenoid lipids withi...
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Online Access: | https://pure.knaw.nl/portal/en/publications/d6fc92a4-defa-4307-b6f0-18e27a435454 https://doi.org/10.1038/s43247-023-00719-3 https://hdl.handle.net/20.500.11755/d6fc92a4-defa-4307-b6f0-18e27a435454 https://pure.knaw.nl/ws/files/880969894/Luostarinen_et_al_2023.pdf |
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ftknawnlpublic:oai:pure.knaw.nl:publications/d6fc92a4-defa-4307-b6f0-18e27a435454 2024-09-15T17:58:53+00:00 Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay Luostarinen, Tiia Weckström, Kaarina Ehn, Jens Kamula, Michelle Burson, Amanda Diaz, Aura Massé, Guillaume McGowan, Suzanne Kuzyk, Zou Zou Heikkilä, Maija 2023-03-16 application/pdf https://pure.knaw.nl/portal/en/publications/d6fc92a4-defa-4307-b6f0-18e27a435454 https://doi.org/10.1038/s43247-023-00719-3 https://hdl.handle.net/20.500.11755/d6fc92a4-defa-4307-b6f0-18e27a435454 https://pure.knaw.nl/ws/files/880969894/Luostarinen_et_al_2023.pdf eng eng https://pure.knaw.nl/portal/en/publications/d6fc92a4-defa-4307-b6f0-18e27a435454 info:eu-repo/semantics/openAccess Luostarinen , T , Weckström , K , Ehn , J , Kamula , M , Burson , A , Diaz , A , Massé , G , McGowan , S , Kuzyk , Z Z & Heikkilä , M 2023 , ' Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay ' , Communications Earth & Environment , vol. 4 , no. 78 . https://doi.org/10.1038/s43247-023-00719-3 article 2023 ftknawnlpublic https://doi.org/10.1038/s43247-023-00719-320.500.11755/d6fc92a4-defa-4307-b6f0-18e27a435454 2024-08-05T23:38:07Z Despite their wide use in past sea-ice reconstructions, the seasonal, habitat and species-based sources of sedimentary sea-ice proxies are poorly understood. Here, we conduct direct observations of the community composition of diatoms, dinoflagellate cysts and highly branched isoprenoid lipids within the sea ice, water column, sediment traps and sediment surface in the Belcher Islands Archipelago, Hudson Bay throughout spring 2019. We find that Arctic diatom and dinoflagellate cysts species commonly used as sea-ice proxies appear to be only indirectly linked to sea-ice conditions, and that the sediment assemblages of these groups overrepresent summertime pelagic blooms. Species contributing to the diverse sea-ice diatom communities are rare in the sediment. Dinoflagellate cysts form a typical Arctic assemblage in the sediment, although they are virtually absent in the sea ice and water column in spring. We also find that certain highly branched isoprenoid lipids that were previously considered indicators of open water, can be produced in sea-ice. We conclude that contextual knowledge and a multiproxy approach are necessary in reconstruction, encouraging further studies on the sources and controls of sea-ice proxy production in different geographic areas. Article in Journal/Newspaper Belcher Islands Hudson Bay Sea ice Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
institution |
Open Polar |
collection |
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
description |
Despite their wide use in past sea-ice reconstructions, the seasonal, habitat and species-based sources of sedimentary sea-ice proxies are poorly understood. Here, we conduct direct observations of the community composition of diatoms, dinoflagellate cysts and highly branched isoprenoid lipids within the sea ice, water column, sediment traps and sediment surface in the Belcher Islands Archipelago, Hudson Bay throughout spring 2019. We find that Arctic diatom and dinoflagellate cysts species commonly used as sea-ice proxies appear to be only indirectly linked to sea-ice conditions, and that the sediment assemblages of these groups overrepresent summertime pelagic blooms. Species contributing to the diverse sea-ice diatom communities are rare in the sediment. Dinoflagellate cysts form a typical Arctic assemblage in the sediment, although they are virtually absent in the sea ice and water column in spring. We also find that certain highly branched isoprenoid lipids that were previously considered indicators of open water, can be produced in sea-ice. We conclude that contextual knowledge and a multiproxy approach are necessary in reconstruction, encouraging further studies on the sources and controls of sea-ice proxy production in different geographic areas. |
format |
Article in Journal/Newspaper |
author |
Luostarinen, Tiia Weckström, Kaarina Ehn, Jens Kamula, Michelle Burson, Amanda Diaz, Aura Massé, Guillaume McGowan, Suzanne Kuzyk, Zou Zou Heikkilä, Maija |
spellingShingle |
Luostarinen, Tiia Weckström, Kaarina Ehn, Jens Kamula, Michelle Burson, Amanda Diaz, Aura Massé, Guillaume McGowan, Suzanne Kuzyk, Zou Zou Heikkilä, Maija Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
author_facet |
Luostarinen, Tiia Weckström, Kaarina Ehn, Jens Kamula, Michelle Burson, Amanda Diaz, Aura Massé, Guillaume McGowan, Suzanne Kuzyk, Zou Zou Heikkilä, Maija |
author_sort |
Luostarinen, Tiia |
title |
Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
title_short |
Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
title_full |
Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
title_fullStr |
Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
title_full_unstemmed |
Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay |
title_sort |
seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in hudson bay |
publishDate |
2023 |
url |
https://pure.knaw.nl/portal/en/publications/d6fc92a4-defa-4307-b6f0-18e27a435454 https://doi.org/10.1038/s43247-023-00719-3 https://hdl.handle.net/20.500.11755/d6fc92a4-defa-4307-b6f0-18e27a435454 https://pure.knaw.nl/ws/files/880969894/Luostarinen_et_al_2023.pdf |
genre |
Belcher Islands Hudson Bay Sea ice |
genre_facet |
Belcher Islands Hudson Bay Sea ice |
op_source |
Luostarinen , T , Weckström , K , Ehn , J , Kamula , M , Burson , A , Diaz , A , Massé , G , McGowan , S , Kuzyk , Z Z & Heikkilä , M 2023 , ' Seasonal and habitat-based variations in vertical export of biogenic sea-ice proxies in Hudson Bay ' , Communications Earth & Environment , vol. 4 , no. 78 . https://doi.org/10.1038/s43247-023-00719-3 |
op_relation |
https://pure.knaw.nl/portal/en/publications/d6fc92a4-defa-4307-b6f0-18e27a435454 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1038/s43247-023-00719-320.500.11755/d6fc92a4-defa-4307-b6f0-18e27a435454 |
_version_ |
1810435849942204416 |