Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective.
Sea-ice microalgae are a key source of energy and nutrient supply to polar marine food webs, particularly during spring, prior to open-water phytoplankton blooms. The nutritional quality of microalgae as a food source depends on their biomolecular (lipid:protein:carbohydrate) composition. In this st...
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ftpubmed:38951587 2024-09-09T19:21:57+00:00 Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. Duncan, Rebecca J Søreide, Janne E Nielsen, Daniel A Varpe, Øystein Wiktor, Józef Tobin, Mark J Pitusi, Vanessa Petrou, Katherina 2024-07-01 https://doi.org/10.1038/s41598-024-65273-0 https://pubmed.ncbi.nlm.nih.gov/38951587 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11217269/ eng eng Nature Publishing Group https://doi.org/10.1038/s41598-024-65273-0 https://pubmed.ncbi.nlm.nih.gov/38951587 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11217269/ © 2024. The Author(s). Sci Rep ISSN:2045-2322 Volume:14 Issue:1 Nitzschia frigida Arctic Biogeochemical cycling Microalgae Sea ice Svalbard Journal Article 2024 ftpubmed https://doi.org/10.1038/s41598-024-65273-0 2024-07-04T16:01:00Z Sea-ice microalgae are a key source of energy and nutrient supply to polar marine food webs, particularly during spring, prior to open-water phytoplankton blooms. The nutritional quality of microalgae as a food source depends on their biomolecular (lipid:protein:carbohydrate) composition. In this study, we used synchrotron-based Fourier transform infra-red microspectroscopy (s-FTIR) to measure the biomolecular content of a dominant sea-ice taxa, Nitzschia frigida, from natural land-fast ice communities throughout the Arctic spring season. Repeated sampling over six weeks from an inner (relatively stable) and an outer (relatively dynamic) fjord site revealed high intra-specific variability in biomolecular content, elucidating the plasticity of N. frigida to adjust to the dynamic sea ice and water conditions. Environmental triggers indicating the end of productivity in the ice and onset of ice melt, including nitrogen limitation and increased water temperature, drove an increase in lipid and fatty acids stores, and a decline in protein and carbohydrate content. In the context of climate change and the predicted Atlantification of the Arctic, dynamic mixing and abrupt warmer water advection could truncate these important end-of-season environmental shifts, causing the algae to be released from the ice prior to adequate lipid storage, influencing carbon transfer through the polar marine system. Article in Journal/Newspaper Arctic Climate change Phytoplankton Sea ice Svalbard PubMed Central (PMC) Arctic Svalbard Scientific Reports 14 1 |
institution |
Open Polar |
collection |
PubMed Central (PMC) |
op_collection_id |
ftpubmed |
language |
English |
topic |
Nitzschia frigida Arctic Biogeochemical cycling Microalgae Sea ice Svalbard |
spellingShingle |
Nitzschia frigida Arctic Biogeochemical cycling Microalgae Sea ice Svalbard Duncan, Rebecca J Søreide, Janne E Nielsen, Daniel A Varpe, Øystein Wiktor, Józef Tobin, Mark J Pitusi, Vanessa Petrou, Katherina Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
topic_facet |
Nitzschia frigida Arctic Biogeochemical cycling Microalgae Sea ice Svalbard |
description |
Sea-ice microalgae are a key source of energy and nutrient supply to polar marine food webs, particularly during spring, prior to open-water phytoplankton blooms. The nutritional quality of microalgae as a food source depends on their biomolecular (lipid:protein:carbohydrate) composition. In this study, we used synchrotron-based Fourier transform infra-red microspectroscopy (s-FTIR) to measure the biomolecular content of a dominant sea-ice taxa, Nitzschia frigida, from natural land-fast ice communities throughout the Arctic spring season. Repeated sampling over six weeks from an inner (relatively stable) and an outer (relatively dynamic) fjord site revealed high intra-specific variability in biomolecular content, elucidating the plasticity of N. frigida to adjust to the dynamic sea ice and water conditions. Environmental triggers indicating the end of productivity in the ice and onset of ice melt, including nitrogen limitation and increased water temperature, drove an increase in lipid and fatty acids stores, and a decline in protein and carbohydrate content. In the context of climate change and the predicted Atlantification of the Arctic, dynamic mixing and abrupt warmer water advection could truncate these important end-of-season environmental shifts, causing the algae to be released from the ice prior to adequate lipid storage, influencing carbon transfer through the polar marine system. |
format |
Article in Journal/Newspaper |
author |
Duncan, Rebecca J Søreide, Janne E Nielsen, Daniel A Varpe, Øystein Wiktor, Józef Tobin, Mark J Pitusi, Vanessa Petrou, Katherina |
author_facet |
Duncan, Rebecca J Søreide, Janne E Nielsen, Daniel A Varpe, Øystein Wiktor, Józef Tobin, Mark J Pitusi, Vanessa Petrou, Katherina |
author_sort |
Duncan, Rebecca J |
title |
Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
title_short |
Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
title_full |
Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
title_fullStr |
Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
title_full_unstemmed |
Seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
title_sort |
seasonal environmental transitions and metabolic plasticity in a sea-ice alga from an individual cell perspective. |
publisher |
Nature Publishing Group |
publishDate |
2024 |
url |
https://doi.org/10.1038/s41598-024-65273-0 https://pubmed.ncbi.nlm.nih.gov/38951587 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11217269/ |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Climate change Phytoplankton Sea ice Svalbard |
genre_facet |
Arctic Climate change Phytoplankton Sea ice Svalbard |
op_source |
Sci Rep ISSN:2045-2322 Volume:14 Issue:1 |
op_relation |
https://doi.org/10.1038/s41598-024-65273-0 https://pubmed.ncbi.nlm.nih.gov/38951587 https://www.ncbi.nlm.nih.gov/pmc/articles/PMC11217269/ |
op_rights |
© 2024. The Author(s). |
op_doi |
https://doi.org/10.1038/s41598-024-65273-0 |
container_title |
Scientific Reports |
container_volume |
14 |
container_issue |
1 |
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1809762230355361792 |