Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics
Photophysiological and biochemical characteristics were investigated in natural communities of Arctic sea ice algae and phytoplankton to understand their respective responses towards variable irradiance and nutrient regimes. This study revealed large differences in photosynthetic efficiency and capa...
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ftawi:oai:epic.awi.de:54141 2024-09-15T17:51:14+00:00 Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics Kvernvik, AC Hoppe, Clara Greenacre, M Verbiest, S Wiktor, JM Gabrielsen, TM Reigstad, M Leu, E 2021 https://epic.awi.de/id/eprint/54141/ https://doi.org/10.3354/meps13675 https://hdl.handle.net/10013/epic.c89f7428-9b0c-4899-9d55-74070a7418b1 unknown Kvernvik, A. , Hoppe, C. orcid:0000-0002-2509-0546 , Greenacre, M. , Verbiest, S. , Wiktor, J. , Gabrielsen, T. , Reigstad, M. and Leu, E. (2021) Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics , Marine Ecology Progress Series, 666 , pp. 31-55 . doi:10.3354/meps13675 <https://doi.org/10.3354/meps13675> , hdl:10013/epic.c89f7428-9b0c-4899-9d55-74070a7418b1 EPIC3Marine Ecology Progress Series, 666, pp. 31-55, ISSN: 0171-8630 Article isiRev 2021 ftawi https://doi.org/10.3354/meps13675 2024-06-24T04:26:11Z Photophysiological and biochemical characteristics were investigated in natural communities of Arctic sea ice algae and phytoplankton to understand their respective responses towards variable irradiance and nutrient regimes. This study revealed large differences in photosynthetic efficiency and capacity between the 2 types of algal assemblages. Sea ice algal assemblages clearly displayed increased photoprotective energy dissipation under the highest daily average irradiance levels (>8 µmol photons m-2 s-1). In contrast, phytoplankton assemblages were generally light-limited within the same irradiance ranges. Furthermore, phytoplankton assemblages exhibited more efficient carbon assimilation rates in the low irradiance range compared to sea ice algae, possibly explaining the ability of phytoplankton to generate substantial under-ice blooms. They were also able to readily adjust and increase their carbon production to higher irradiances. The Arctic is warming more rapidly than any other oceanic region on the planet, and as a consequence, irradiance levels experienced by microalgae are expected to increase due to declining ice thickness and snow cover, as well as enhanced stratification. The results of this study suggest that sea ice algae may have less capacity to adapt to the expected environmental changes compared to phytoplankton. We therefore anticipate a change in sea ice-based vs. pelagic primary production with respect to timing and quantity in a future Arctic. The clearly distinct responses of sea ice algae vs. phytoplankton need to be incorporated into model scenarios of current and future Arctic algal blooms and considered when predicting implications for the entire ecosystem and associated biogeochemical fluxes. Article in Journal/Newspaper Arctic ice algae Phytoplankton Sea ice Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) Marine Ecology Progress Series 666 31 55 |
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Alfred Wegener Institute for Polar- and Marine Research (AWI): ePIC (electronic Publication Information Center) |
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ftawi |
language |
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description |
Photophysiological and biochemical characteristics were investigated in natural communities of Arctic sea ice algae and phytoplankton to understand their respective responses towards variable irradiance and nutrient regimes. This study revealed large differences in photosynthetic efficiency and capacity between the 2 types of algal assemblages. Sea ice algal assemblages clearly displayed increased photoprotective energy dissipation under the highest daily average irradiance levels (>8 µmol photons m-2 s-1). In contrast, phytoplankton assemblages were generally light-limited within the same irradiance ranges. Furthermore, phytoplankton assemblages exhibited more efficient carbon assimilation rates in the low irradiance range compared to sea ice algae, possibly explaining the ability of phytoplankton to generate substantial under-ice blooms. They were also able to readily adjust and increase their carbon production to higher irradiances. The Arctic is warming more rapidly than any other oceanic region on the planet, and as a consequence, irradiance levels experienced by microalgae are expected to increase due to declining ice thickness and snow cover, as well as enhanced stratification. The results of this study suggest that sea ice algae may have less capacity to adapt to the expected environmental changes compared to phytoplankton. We therefore anticipate a change in sea ice-based vs. pelagic primary production with respect to timing and quantity in a future Arctic. The clearly distinct responses of sea ice algae vs. phytoplankton need to be incorporated into model scenarios of current and future Arctic algal blooms and considered when predicting implications for the entire ecosystem and associated biogeochemical fluxes. |
format |
Article in Journal/Newspaper |
author |
Kvernvik, AC Hoppe, Clara Greenacre, M Verbiest, S Wiktor, JM Gabrielsen, TM Reigstad, M Leu, E |
spellingShingle |
Kvernvik, AC Hoppe, Clara Greenacre, M Verbiest, S Wiktor, JM Gabrielsen, TM Reigstad, M Leu, E Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
author_facet |
Kvernvik, AC Hoppe, Clara Greenacre, M Verbiest, S Wiktor, JM Gabrielsen, TM Reigstad, M Leu, E |
author_sort |
Kvernvik, AC |
title |
Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
title_short |
Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
title_full |
Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
title_fullStr |
Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
title_full_unstemmed |
Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
title_sort |
arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics |
publishDate |
2021 |
url |
https://epic.awi.de/id/eprint/54141/ https://doi.org/10.3354/meps13675 https://hdl.handle.net/10013/epic.c89f7428-9b0c-4899-9d55-74070a7418b1 |
genre |
Arctic ice algae Phytoplankton Sea ice |
genre_facet |
Arctic ice algae Phytoplankton Sea ice |
op_source |
EPIC3Marine Ecology Progress Series, 666, pp. 31-55, ISSN: 0171-8630 |
op_relation |
Kvernvik, A. , Hoppe, C. orcid:0000-0002-2509-0546 , Greenacre, M. , Verbiest, S. , Wiktor, J. , Gabrielsen, T. , Reigstad, M. and Leu, E. (2021) Arctic sea ice algae differ markedly from phytoplankton in their ecophysiological characteristics , Marine Ecology Progress Series, 666 , pp. 31-55 . doi:10.3354/meps13675 <https://doi.org/10.3354/meps13675> , hdl:10013/epic.c89f7428-9b0c-4899-9d55-74070a7418b1 |
op_doi |
https://doi.org/10.3354/meps13675 |
container_title |
Marine Ecology Progress Series |
container_volume |
666 |
container_start_page |
31 |
op_container_end_page |
55 |
_version_ |
1810293071152152576 |