DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf
The central Arctic Ocean is rapidly changing due to amplified warming and sea ice retreat. Nonetheless, it remains challenging to document and decipher impacts on key ecosystem processes such as primary production and pelagic-benthic coupling, due to limited observations in this remote area. Here we...
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Online Access: | https://doi.org/10.3389/fmars.2022.1004959.s002 |
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ftunivfreestate:oai:figshare.com:article/21762221 2023-05-15T15:03:35+02:00 DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf Christina Bienhold (107582) Vibe Schourup-Kristensen (6001571) Thomas Krumpen (4427710) Eva-Maria Nöthig (2148049) Frank Wenzhöfer (107584) Meri Korhonen (6937259) Myriel Vredenborg (14287952) Laura Hehemann (8983247) Antje Boetius (58870) 2022-12-21T04:47:42Z https://doi.org/10.3389/fmars.2022.1004959.s002 unknown https://figshare.com/articles/dataset/DataSheet_2_Effects_of_sea_ice_retreat_and_ocean_warming_on_the_Laptev_Sea_continental_slope_ecosystem_1993_vs_2012_pdf/21762221 doi:10.3389/fmars.2022.1004959.s002 CC BY 4.0 CC-BY Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering siberian shelf laptev sea arctic ocean continental slope sea ice Dataset 2022 ftunivfreestate https://doi.org/10.3389/fmars.2022.1004959.s002 2022-12-23T00:23:25Z The central Arctic Ocean is rapidly changing due to amplified warming and sea ice retreat. Nonetheless, it remains challenging to document and decipher impacts on key ecosystem processes such as primary production and pelagic-benthic coupling, due to limited observations in this remote area. Here we investigated environmental changes at the Laptev Sea continental slope (60-3400 m water depth) from the surface to the seafloor, by replicating sample transects two decades apart. Mean break-up of sea ice occurred earlier and mean freeze-up occurred later in 2012 compared to 1993, extending the ice-free period by more than 30 days. On average, observations and model results showed an annual increase in primary production of 30% and more in the study area in 2012. In contrast, calculated and modelled fluxes of particulate organic carbon (POC) to the seafloor were only slightly higher in 2012 and did not extend as far into the deep Laptev Sea as the increase in primary production, possibly due to a more developed retention system. Nevertheless, benthic surveys revealed a substantial increase in phytodetritus availability at the seafloor along the entire transect from the shelf edge to the deep sea. This calls for carbon input by lateral advection from the shelves, additional input from sea ice, and/or a late summer bloom. We also investigated the composition and activity of bacterial communities at the seafloor and potential linkages to the observed environmental changes. While bacterial abundance, biomass and overall community structure showed no systematic differences between the two contrasting years at all depths, extracellular enzymatic activities had increased as a result of higher food availability. This was partly reflected in higher benthic oxygen uptake, indicating a moderate impact on benthic remineralization rates at the time of sampling. Our results show considerable effects of ocean warming and sea ice loss on the ecosystem from the surface ocean to the seafloor in the Laptev Sea, which are likely to ... Dataset Arctic Arctic Ocean laptev Laptev Sea Sea ice KovsieScholar Repository (University of the Free State - UFS UV) Arctic Arctic Ocean Laptev Sea |
institution |
Open Polar |
collection |
KovsieScholar Repository (University of the Free State - UFS UV) |
op_collection_id |
ftunivfreestate |
language |
unknown |
topic |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering siberian shelf laptev sea arctic ocean continental slope sea ice |
spellingShingle |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering siberian shelf laptev sea arctic ocean continental slope sea ice Christina Bienhold (107582) Vibe Schourup-Kristensen (6001571) Thomas Krumpen (4427710) Eva-Maria Nöthig (2148049) Frank Wenzhöfer (107584) Meri Korhonen (6937259) Myriel Vredenborg (14287952) Laura Hehemann (8983247) Antje Boetius (58870) DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
topic_facet |
Oceanography Marine Biology Marine Geoscience Biological Oceanography Chemical Oceanography Physical Oceanography Marine Engineering siberian shelf laptev sea arctic ocean continental slope sea ice |
description |
The central Arctic Ocean is rapidly changing due to amplified warming and sea ice retreat. Nonetheless, it remains challenging to document and decipher impacts on key ecosystem processes such as primary production and pelagic-benthic coupling, due to limited observations in this remote area. Here we investigated environmental changes at the Laptev Sea continental slope (60-3400 m water depth) from the surface to the seafloor, by replicating sample transects two decades apart. Mean break-up of sea ice occurred earlier and mean freeze-up occurred later in 2012 compared to 1993, extending the ice-free period by more than 30 days. On average, observations and model results showed an annual increase in primary production of 30% and more in the study area in 2012. In contrast, calculated and modelled fluxes of particulate organic carbon (POC) to the seafloor were only slightly higher in 2012 and did not extend as far into the deep Laptev Sea as the increase in primary production, possibly due to a more developed retention system. Nevertheless, benthic surveys revealed a substantial increase in phytodetritus availability at the seafloor along the entire transect from the shelf edge to the deep sea. This calls for carbon input by lateral advection from the shelves, additional input from sea ice, and/or a late summer bloom. We also investigated the composition and activity of bacterial communities at the seafloor and potential linkages to the observed environmental changes. While bacterial abundance, biomass and overall community structure showed no systematic differences between the two contrasting years at all depths, extracellular enzymatic activities had increased as a result of higher food availability. This was partly reflected in higher benthic oxygen uptake, indicating a moderate impact on benthic remineralization rates at the time of sampling. Our results show considerable effects of ocean warming and sea ice loss on the ecosystem from the surface ocean to the seafloor in the Laptev Sea, which are likely to ... |
format |
Dataset |
author |
Christina Bienhold (107582) Vibe Schourup-Kristensen (6001571) Thomas Krumpen (4427710) Eva-Maria Nöthig (2148049) Frank Wenzhöfer (107584) Meri Korhonen (6937259) Myriel Vredenborg (14287952) Laura Hehemann (8983247) Antje Boetius (58870) |
author_facet |
Christina Bienhold (107582) Vibe Schourup-Kristensen (6001571) Thomas Krumpen (4427710) Eva-Maria Nöthig (2148049) Frank Wenzhöfer (107584) Meri Korhonen (6937259) Myriel Vredenborg (14287952) Laura Hehemann (8983247) Antje Boetius (58870) |
author_sort |
Christina Bienhold (107582) |
title |
DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
title_short |
DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
title_full |
DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
title_fullStr |
DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
title_full_unstemmed |
DataSheet_2_Effects of sea ice retreat and ocean warming on the Laptev Sea continental slope ecosystem (1993 vs 2012).pdf |
title_sort |
datasheet_2_effects of sea ice retreat and ocean warming on the laptev sea continental slope ecosystem (1993 vs 2012).pdf |
publishDate |
2022 |
url |
https://doi.org/10.3389/fmars.2022.1004959.s002 |
geographic |
Arctic Arctic Ocean Laptev Sea |
geographic_facet |
Arctic Arctic Ocean Laptev Sea |
genre |
Arctic Arctic Ocean laptev Laptev Sea Sea ice |
genre_facet |
Arctic Arctic Ocean laptev Laptev Sea Sea ice |
op_relation |
https://figshare.com/articles/dataset/DataSheet_2_Effects_of_sea_ice_retreat_and_ocean_warming_on_the_Laptev_Sea_continental_slope_ecosystem_1993_vs_2012_pdf/21762221 doi:10.3389/fmars.2022.1004959.s002 |
op_rights |
CC BY 4.0 |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.3389/fmars.2022.1004959.s002 |
_version_ |
1766335450060947456 |