On the phenology and seeding potential of sea-ice microalgal species

Sea ice is an important habitat for a wide variety of microalgal species. Depending on the species composition, sea ice can be a seeding source for pelagic phytoplankton blooms after ice melt in spring. Sea-ice algal communities were studied over 2 full winter seasons in 2014 and 2016 at Rothera Res...

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Published in:Elementa: Science of the Anthropocene
Main Authors: van Leeuwe, Maria A., Fenton, Mairi, Davey, Emily, Rintala, Janne-Markus, Jones, Elizabeth Marie, Meredith, Michael P., Stefels, Jacqueline
Format: Article in Journal/Newspaper
Language:English
Published: 2022
Subjects:
Online Access:https://hdl.handle.net/11250/2999726
https://doi.org/10.1525/elementa.2021.00029
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spelling ftimr:oai:imr.brage.unit.no:11250/2999726 2023-05-15T13:44:00+02:00 On the phenology and seeding potential of sea-ice microalgal species van Leeuwe, Maria A. Fenton, Mairi Davey, Emily Rintala, Janne-Markus Jones, Elizabeth Marie Meredith, Michael P. Stefels, Jacqueline 2022 application/pdf https://hdl.handle.net/11250/2999726 https://doi.org/10.1525/elementa.2021.00029 eng eng Elementa: Science of the Anthropocene. 2022, 10 (1), . urn:issn:2325-1026 https://hdl.handle.net/11250/2999726 https://doi.org/10.1525/elementa.2021.00029 cristin:2016361 0 10 Elementa: Science of the Anthropocene 1 Peer reviewed Journal article 2022 ftimr https://doi.org/10.1525/elementa.2021.00029 2022-06-22T22:40:31Z Sea ice is an important habitat for a wide variety of microalgal species. Depending on the species composition, sea ice can be a seeding source for pelagic phytoplankton blooms after ice melt in spring. Sea-ice algal communities were studied over 2 full winter seasons in 2014 and 2016 at Rothera Research Station, situated at the Western Antarctic Peninsula (WAP). Algal pigment patterns and microscopic observations were combined with photophysiological studies based on fluorescence analyses to monitor and explain the phenology of ice-algal species. Clear patterns in species succession were identified. Young sea ice contained a mixture of algal species including dinoflagellates, cryptophytes and diatoms like Chaetoceros spp. and Fragillariopsis spp. In winter, severe environmental conditions resulted in a decline in species diversity and selection towards heterotrophy. Pennate diatoms like Amphiprora kufferathii and Berkeleya adeliensis were the first to dominate the nutrient-enriched bottom-ice layers in early spring. The bottom communities exhibited a remarkably stable value for the photoadaptation parameter, Ek, of circa 25 µmol photons m–2 s–1. Whereas pennate diatoms were most abundant in spring ice, the initial seeding event linked to ice melt was associated with flagellate species. Haptophyte species like Phaeocystis antarctica and prymnesiophytes like Pyramimonas spp. best sustained the transition from sea ice to seawater. Comparison with previous studies shows that the seeding patterns observed in Ryder Bay were characteristic over the wider sea-ice domain, Arctic and Antarctic. Over the course of this century, the WAP is predicted to experience continuing thinning and decline in sea-ice cover. For the near future, we expect that especially microalgal communities of haptophytes and chlorophytes will benefit from the changes, with yet unknown implications for carbon fluxes and higher trophic levels. publishedVersion Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Arctic Phytoplankton Sea ice Institute for Marine Research: Brage IMR Arctic Antarctic Antarctic Peninsula Rothera ENVELOPE(-68.130,-68.130,-67.568,-67.568) Ryder ENVELOPE(-68.333,-68.333,-67.566,-67.566) Ryder Bay ENVELOPE(-68.333,-68.333,-67.567,-67.567) Rothera Research Station ENVELOPE(-68.129,-68.129,-67.566,-67.566) Elementa: Science of the Anthropocene 10 1
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collection Institute for Marine Research: Brage IMR
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description Sea ice is an important habitat for a wide variety of microalgal species. Depending on the species composition, sea ice can be a seeding source for pelagic phytoplankton blooms after ice melt in spring. Sea-ice algal communities were studied over 2 full winter seasons in 2014 and 2016 at Rothera Research Station, situated at the Western Antarctic Peninsula (WAP). Algal pigment patterns and microscopic observations were combined with photophysiological studies based on fluorescence analyses to monitor and explain the phenology of ice-algal species. Clear patterns in species succession were identified. Young sea ice contained a mixture of algal species including dinoflagellates, cryptophytes and diatoms like Chaetoceros spp. and Fragillariopsis spp. In winter, severe environmental conditions resulted in a decline in species diversity and selection towards heterotrophy. Pennate diatoms like Amphiprora kufferathii and Berkeleya adeliensis were the first to dominate the nutrient-enriched bottom-ice layers in early spring. The bottom communities exhibited a remarkably stable value for the photoadaptation parameter, Ek, of circa 25 µmol photons m–2 s–1. Whereas pennate diatoms were most abundant in spring ice, the initial seeding event linked to ice melt was associated with flagellate species. Haptophyte species like Phaeocystis antarctica and prymnesiophytes like Pyramimonas spp. best sustained the transition from sea ice to seawater. Comparison with previous studies shows that the seeding patterns observed in Ryder Bay were characteristic over the wider sea-ice domain, Arctic and Antarctic. Over the course of this century, the WAP is predicted to experience continuing thinning and decline in sea-ice cover. For the near future, we expect that especially microalgal communities of haptophytes and chlorophytes will benefit from the changes, with yet unknown implications for carbon fluxes and higher trophic levels. publishedVersion
format Article in Journal/Newspaper
author van Leeuwe, Maria A.
Fenton, Mairi
Davey, Emily
Rintala, Janne-Markus
Jones, Elizabeth Marie
Meredith, Michael P.
Stefels, Jacqueline
spellingShingle van Leeuwe, Maria A.
Fenton, Mairi
Davey, Emily
Rintala, Janne-Markus
Jones, Elizabeth Marie
Meredith, Michael P.
Stefels, Jacqueline
On the phenology and seeding potential of sea-ice microalgal species
author_facet van Leeuwe, Maria A.
Fenton, Mairi
Davey, Emily
Rintala, Janne-Markus
Jones, Elizabeth Marie
Meredith, Michael P.
Stefels, Jacqueline
author_sort van Leeuwe, Maria A.
title On the phenology and seeding potential of sea-ice microalgal species
title_short On the phenology and seeding potential of sea-ice microalgal species
title_full On the phenology and seeding potential of sea-ice microalgal species
title_fullStr On the phenology and seeding potential of sea-ice microalgal species
title_full_unstemmed On the phenology and seeding potential of sea-ice microalgal species
title_sort on the phenology and seeding potential of sea-ice microalgal species
publishDate 2022
url https://hdl.handle.net/11250/2999726
https://doi.org/10.1525/elementa.2021.00029
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Elementa: Science of the Anthropocene
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op_relation Elementa: Science of the Anthropocene. 2022, 10 (1), .
urn:issn:2325-1026
https://hdl.handle.net/11250/2999726
https://doi.org/10.1525/elementa.2021.00029
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container_title Elementa: Science of the Anthropocene
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