Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux
The decrease in Arctic sea-ice extent and thickness as a result of global warming will impact the timing, duration, magnitude and composition of phytoplankton production with cascading effects on Arctic marine food-webs and biogeochemical cycles. Here, we elucidate the environmental drivers shaping...
Published in: | Progress in Oceanography |
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Main Authors: | , , , , , , , , , , , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
2023
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Subjects: | |
Online Access: | http://hdl.handle.net/10852/102649 https://doi.org/10.1016/j.pocean.2023.103018 |
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ftoslouniv:oai:www.duo.uio.no:10852/102649 |
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openpolar |
institution |
Open Polar |
collection |
Universitet i Oslo: Digitale utgivelser ved UiO (DUO) |
op_collection_id |
ftoslouniv |
language |
English |
description |
The decrease in Arctic sea-ice extent and thickness as a result of global warming will impact the timing, duration, magnitude and composition of phytoplankton production with cascading effects on Arctic marine food-webs and biogeochemical cycles. Here, we elucidate the environmental drivers shaping the composition, abundance, biomass, trophic state and vertical flux of protists (unicellular eukaryotes), including phytoplankton, in the Barents Sea in late August 2018 and 2019. The two years were characterized by contrasting sea-ice conditions. In August 2018, the sea-ice edge had retreated well beyond the shelf break into the Nansen Basin (>82°N), while in 2019, extensive areas of the northwestern Barents Sea shelf (>79°N) were still ice-covered. These contrasting sea-ice conditions resulted in marked interannual differences in the pelagic protist community structure in this area. In August 2018, the protist community was in a post-bloom stage of seasonal succession characterized by oligotrophic surface waters and dominance of small-sized phytoplankton and heterotrophic protists (predominantly flagellates and ciliates) at most stations. In 2019, a higher contribution of autotrophs and large-celled phytoplankton, particularly diatoms, to total protist biomass compared to 2018 was reflected in higher chlorophyll a concentrations and suggested that the protist community was still in a late bloom stage at some stations. It is noteworthy that particularly diatoms contributed a considerably higher proportion to the protist biomass at the ice-covered stations in both years compared to the open-water stations. This pattern was also evident in the higher vertical protist biomass flux in 2019, dominated by dinoflagellates and diatoms, compared to 2018. Our results suggest that the predicted transition toward an ice-free Barents Sea will lengthen the oligotrophic summer period with low algal biomass and associated low vertical flux. |
format |
Article in Journal/Newspaper |
author |
Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp |
spellingShingle |
Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
author_facet |
Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp |
author_sort |
Kohlbach, Doreen |
title |
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
title_short |
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
title_full |
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
title_fullStr |
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
title_full_unstemmed |
Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux |
title_sort |
earlier sea-ice melt extends the oligotrophic summer period in the barents sea with low algal biomass and associated low vertical flux |
publishDate |
2023 |
url |
http://hdl.handle.net/10852/102649 https://doi.org/10.1016/j.pocean.2023.103018 |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea Global warming Nansen Basin Phytoplankton Sea ice |
genre_facet |
Arctic Barents Sea Global warming Nansen Basin Phytoplankton Sea ice |
op_source |
0079-6611 |
op_relation |
NFR/276730 Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp . Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux. Progress in Oceanography. 2023, 213 http://hdl.handle.net/10852/102649 2137827 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Progress in Oceanography&rft.volume=213&rft.spage=&rft.date=2023 Progress in Oceanography 213 28 https://doi.org/10.1016/j.pocean.2023.103018 |
op_rights |
Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1016/j.pocean.2023.103018 |
container_title |
Progress in Oceanography |
container_volume |
213 |
container_start_page |
103018 |
_version_ |
1772812439239262208 |
spelling |
ftoslouniv:oai:www.duo.uio.no:10852/102649 2023-07-30T04:01:40+02:00 Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux ENEngelskEnglishEarlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp 2023-03-29T08:00:55Z http://hdl.handle.net/10852/102649 https://doi.org/10.1016/j.pocean.2023.103018 EN eng NFR/276730 Kohlbach, Doreen Goraguer, Lucie Bodur, Yasemin V. Müller, Oliver Amargant Arumí, Martí Blix, Katalin Bratbak, Gunnar Chierici, Melissa Dabrowska, Anna Maria Dietrich, Ulrike Edvardsen, Bente Garcia, Laura Gradinger, Rolf Rudolf Hop, Haakon Jones, Elizabeth Marie Øyvind, Lundesgaard Olsen, Lasse Mork Reigstad, Marit Saubrekka, Karoline Tatarek, Agnieszka Wiktor, Josef Maria Wold, Anette Assmy, Philipp . Earlier sea-ice melt extends the oligotrophic summer period in the Barents Sea with low algal biomass and associated low vertical flux. Progress in Oceanography. 2023, 213 http://hdl.handle.net/10852/102649 2137827 info:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Progress in Oceanography&rft.volume=213&rft.spage=&rft.date=2023 Progress in Oceanography 213 28 https://doi.org/10.1016/j.pocean.2023.103018 Attribution 4.0 International https://creativecommons.org/licenses/by/4.0/ 0079-6611 Journal article Tidsskriftartikkel Peer reviewed PublishedVersion 2023 ftoslouniv https://doi.org/10.1016/j.pocean.2023.103018 2023-07-12T22:38:52Z The decrease in Arctic sea-ice extent and thickness as a result of global warming will impact the timing, duration, magnitude and composition of phytoplankton production with cascading effects on Arctic marine food-webs and biogeochemical cycles. Here, we elucidate the environmental drivers shaping the composition, abundance, biomass, trophic state and vertical flux of protists (unicellular eukaryotes), including phytoplankton, in the Barents Sea in late August 2018 and 2019. The two years were characterized by contrasting sea-ice conditions. In August 2018, the sea-ice edge had retreated well beyond the shelf break into the Nansen Basin (>82°N), while in 2019, extensive areas of the northwestern Barents Sea shelf (>79°N) were still ice-covered. These contrasting sea-ice conditions resulted in marked interannual differences in the pelagic protist community structure in this area. In August 2018, the protist community was in a post-bloom stage of seasonal succession characterized by oligotrophic surface waters and dominance of small-sized phytoplankton and heterotrophic protists (predominantly flagellates and ciliates) at most stations. In 2019, a higher contribution of autotrophs and large-celled phytoplankton, particularly diatoms, to total protist biomass compared to 2018 was reflected in higher chlorophyll a concentrations and suggested that the protist community was still in a late bloom stage at some stations. It is noteworthy that particularly diatoms contributed a considerably higher proportion to the protist biomass at the ice-covered stations in both years compared to the open-water stations. This pattern was also evident in the higher vertical protist biomass flux in 2019, dominated by dinoflagellates and diatoms, compared to 2018. Our results suggest that the predicted transition toward an ice-free Barents Sea will lengthen the oligotrophic summer period with low algal biomass and associated low vertical flux. Article in Journal/Newspaper Arctic Barents Sea Global warming Nansen Basin Phytoplankton Sea ice Universitet i Oslo: Digitale utgivelser ved UiO (DUO) Arctic Barents Sea Progress in Oceanography 213 103018 |