An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters
The pelagic spring bloom is essential for Arctic marine food webs, and a crucial driver of carbon transport to the ocean depths. A critical challenge is understanding its timing and magnitude, to predict its changes in coming decades. Spring bloom onset is typically light-limited, beginning when irr...
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ftpubmed:oai:pubmedcentral.nih.gov:7858608 2023-05-15T14:49:36+02:00 An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters Søgaard, Dorte H. Sorrell, Brian K. Sejr, Mikael K. Andersen, Per Rysgaard, Søren Hansen, Per Juel Skyttä, Annaliina Lemcke, Signe Lund-Hansen, Lars Chresten 2021-02-03 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7858608/ https://doi.org/10.1038/s41598-021-82413-y en eng Nature Publishing Group UK http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7858608/ http://dx.doi.org/10.1038/s41598-021-82413-y © The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. CC-BY Sci Rep Article Text 2021 ftpubmed https://doi.org/10.1038/s41598-021-82413-y 2021-02-07T01:58:17Z The pelagic spring bloom is essential for Arctic marine food webs, and a crucial driver of carbon transport to the ocean depths. A critical challenge is understanding its timing and magnitude, to predict its changes in coming decades. Spring bloom onset is typically light-limited, beginning when irradiance increases or during ice breakup. Here we report an acute 9-day under-ice algal bloom in nutrient-poor, freshwater-influenced water under 1-m thick sea ice. It was dominated by mixotrophic brackish water haptophytes (Chrysochromulina/ Prymnesium) that produced 5.7 g C m(−2) new production. This estimate represents about half the annual pelagic production, occurring below sea ice with a large contribution from the mixotrophic algae bloom. The freshwater-influenced, nutrient-dilute and low light environment combined with mixotrophic community dominance implies that phagotrophy played a critical role in the under-ice bloom. We argue that such blooms dominated by potentially toxic mixotrophic algae might become more common and widespread in the future Arctic Ocean. Text Arctic Arctic Ocean Sea ice PubMed Central (PMC) Arctic Arctic Ocean Scientific Reports 11 1 |
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Article Søgaard, Dorte H. Sorrell, Brian K. Sejr, Mikael K. Andersen, Per Rysgaard, Søren Hansen, Per Juel Skyttä, Annaliina Lemcke, Signe Lund-Hansen, Lars Chresten An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
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Article |
description |
The pelagic spring bloom is essential for Arctic marine food webs, and a crucial driver of carbon transport to the ocean depths. A critical challenge is understanding its timing and magnitude, to predict its changes in coming decades. Spring bloom onset is typically light-limited, beginning when irradiance increases or during ice breakup. Here we report an acute 9-day under-ice algal bloom in nutrient-poor, freshwater-influenced water under 1-m thick sea ice. It was dominated by mixotrophic brackish water haptophytes (Chrysochromulina/ Prymnesium) that produced 5.7 g C m(−2) new production. This estimate represents about half the annual pelagic production, occurring below sea ice with a large contribution from the mixotrophic algae bloom. The freshwater-influenced, nutrient-dilute and low light environment combined with mixotrophic community dominance implies that phagotrophy played a critical role in the under-ice bloom. We argue that such blooms dominated by potentially toxic mixotrophic algae might become more common and widespread in the future Arctic Ocean. |
format |
Text |
author |
Søgaard, Dorte H. Sorrell, Brian K. Sejr, Mikael K. Andersen, Per Rysgaard, Søren Hansen, Per Juel Skyttä, Annaliina Lemcke, Signe Lund-Hansen, Lars Chresten |
author_facet |
Søgaard, Dorte H. Sorrell, Brian K. Sejr, Mikael K. Andersen, Per Rysgaard, Søren Hansen, Per Juel Skyttä, Annaliina Lemcke, Signe Lund-Hansen, Lars Chresten |
author_sort |
Søgaard, Dorte H. |
title |
An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
title_short |
An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
title_full |
An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
title_fullStr |
An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
title_full_unstemmed |
An under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced Arctic waters |
title_sort |
under-ice bloom of mixotrophic haptophytes in low nutrient and freshwater-influenced arctic waters |
publisher |
Nature Publishing Group UK |
publishDate |
2021 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7858608/ https://doi.org/10.1038/s41598-021-82413-y |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
Sci Rep |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7858608/ http://dx.doi.org/10.1038/s41598-021-82413-y |
op_rights |
© The Author(s) 2021 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1038/s41598-021-82413-y |
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Scientific Reports |
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11 |
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1 |
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1766320680261910528 |