FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic
A recent study demonstrated that an Arctic tidal strait, where a shoaled and constricted waterway increases tidally driven sub-ice currents and turbulence, represents a “hotspot” for ice algal production due to a hypothesized enhanced ocean-ice nutrient supply. Based on these findings, we sampled th...
Published in: | Elementa: Science of the Anthropocene |
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University of California Press
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crunicaliforniap:10.1525/elementa.2021.00094 2024-09-15T18:26:56+00:00 FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic Pogorzelec, Nicole M. Gough, Kathleen M. Ha, Sun-Yong Campbell, Karley Else, Brent Kim, Kwanwoo Lee, Sang Heon Mundy, C. J. 2022 http://dx.doi.org/10.1525/elementa.2021.00094 https://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.2021.00094/767216/elementa.2021.00094.pdf en eng University of California Press http://creativecommons.org/licenses/by/4.0/ Elementa: Science of the Anthropocene volume 10, issue 1 ISSN 2325-1026 journal-article 2022 crunicaliforniap https://doi.org/10.1525/elementa.2021.00094 2024-07-04T04:26:30Z A recent study demonstrated that an Arctic tidal strait, where a shoaled and constricted waterway increases tidally driven sub-ice currents and turbulence, represents a “hotspot” for ice algal production due to a hypothesized enhanced ocean-ice nutrient supply. Based on these findings, we sampled the bottom-ice algal community across the same tidal strait between the Finlayson Islands within Dease Strait, Nunavut, Canada, in spring 2017. Our objective was to examine cellular responses of sea-ice diatoms to two expected nutrient supply gradients in their natural environment: (1) a horizontal gradient across the tidal strait and (2) a vertical gradient in the bottom-ice matrix. Two diatom taxa, Nitzschia frigida and Attheya spp. in bottom-ice sections (0–2, 2–5, and 5–10 cm) under thin snow cover (<5 cm), were selected for Fourier Transform Infrared (FTIR) spectrochemical analysis for lipid and protein content. Results from the FTIR technique strongly supported the existence of a horizontal nutrient gradient across the tidal strait of the Finlayson Islands, while estimates of particulate organic carbon and chlorophyll a concentrations were difficult to interpret. The larger N. frigida cells appeared to be more sensitive to the suspected horizontal nutrient gradient, significantly increasing in lipid content relative to protein beyond the tidal strait. In contrast, the epiphytic diatoms, Attheya spp., were more sensitive to the vertical gradient: above 2 cm in the bottom-ice matrix, the non-motile cells appeared to be trapped with a depleted nutrient inventory and evidence of a post-bloom state. Application of the FTIR technique to estimate biomolecular composition of algal cells provided new insights on the response of the bottom-ice algal community to the examined spatial gradients that could not be obtained from conventional bulk measurements alone. Future studies of sea ice and associated environments are thus encouraged to employ this technique. Article in Journal/Newspaper Nunavut Sea ice University of California Press Elementa: Science of the Anthropocene 10 1 |
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Open Polar |
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University of California Press |
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crunicaliforniap |
language |
English |
description |
A recent study demonstrated that an Arctic tidal strait, where a shoaled and constricted waterway increases tidally driven sub-ice currents and turbulence, represents a “hotspot” for ice algal production due to a hypothesized enhanced ocean-ice nutrient supply. Based on these findings, we sampled the bottom-ice algal community across the same tidal strait between the Finlayson Islands within Dease Strait, Nunavut, Canada, in spring 2017. Our objective was to examine cellular responses of sea-ice diatoms to two expected nutrient supply gradients in their natural environment: (1) a horizontal gradient across the tidal strait and (2) a vertical gradient in the bottom-ice matrix. Two diatom taxa, Nitzschia frigida and Attheya spp. in bottom-ice sections (0–2, 2–5, and 5–10 cm) under thin snow cover (<5 cm), were selected for Fourier Transform Infrared (FTIR) spectrochemical analysis for lipid and protein content. Results from the FTIR technique strongly supported the existence of a horizontal nutrient gradient across the tidal strait of the Finlayson Islands, while estimates of particulate organic carbon and chlorophyll a concentrations were difficult to interpret. The larger N. frigida cells appeared to be more sensitive to the suspected horizontal nutrient gradient, significantly increasing in lipid content relative to protein beyond the tidal strait. In contrast, the epiphytic diatoms, Attheya spp., were more sensitive to the vertical gradient: above 2 cm in the bottom-ice matrix, the non-motile cells appeared to be trapped with a depleted nutrient inventory and evidence of a post-bloom state. Application of the FTIR technique to estimate biomolecular composition of algal cells provided new insights on the response of the bottom-ice algal community to the examined spatial gradients that could not be obtained from conventional bulk measurements alone. Future studies of sea ice and associated environments are thus encouraged to employ this technique. |
format |
Article in Journal/Newspaper |
author |
Pogorzelec, Nicole M. Gough, Kathleen M. Ha, Sun-Yong Campbell, Karley Else, Brent Kim, Kwanwoo Lee, Sang Heon Mundy, C. J. |
spellingShingle |
Pogorzelec, Nicole M. Gough, Kathleen M. Ha, Sun-Yong Campbell, Karley Else, Brent Kim, Kwanwoo Lee, Sang Heon Mundy, C. J. FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
author_facet |
Pogorzelec, Nicole M. Gough, Kathleen M. Ha, Sun-Yong Campbell, Karley Else, Brent Kim, Kwanwoo Lee, Sang Heon Mundy, C. J. |
author_sort |
Pogorzelec, Nicole M. |
title |
FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
title_short |
FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
title_full |
FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
title_fullStr |
FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
title_full_unstemmed |
FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic |
title_sort |
ftir autecological analysis of bottom-ice diatom taxa across a tidal strait in the canadian arctic |
publisher |
University of California Press |
publishDate |
2022 |
url |
http://dx.doi.org/10.1525/elementa.2021.00094 https://online.ucpress.edu/elementa/article-pdf/doi/10.1525/elementa.2021.00094/767216/elementa.2021.00094.pdf |
genre |
Nunavut Sea ice |
genre_facet |
Nunavut Sea ice |
op_source |
Elementa: Science of the Anthropocene volume 10, issue 1 ISSN 2325-1026 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1525/elementa.2021.00094 |
container_title |
Elementa: Science of the Anthropocene |
container_volume |
10 |
container_issue |
1 |
_version_ |
1810467572602109952 |