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dc.contributor.authorPogorzelec, Nicole M.
dc.contributor.authorGough, Kathleen M.
dc.contributor.authorHa, Sun-Yong
dc.contributor.authorCampbell, Karley
dc.contributor.authorElse, Brent
dc.contributor.authorKim, Kwanwoo
dc.contributor.authorLee, Sang Heon
dc.contributor.authorMundy, C.J.
dc.date.accessioned2023-01-12T09:39:59Z
dc.date.available2023-01-12T09:39:59Z
dc.date.issued2022-12-23
dc.description.abstractA 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 bottomice 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.en_US
dc.identifier.citationPogorzelec, Gough, Ha, Campbell KL, Else B, Kim, Lee, Mundy C. FTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arctic . Elementa: Science of the Anthropocene. 2022;10(1)en_US
dc.identifier.cristinIDFRIDAID 2103583
dc.identifier.doi10.1525/elementa.2021.00094
dc.identifier.issn2325-1026
dc.identifier.urihttps://hdl.handle.net/10037/28181
dc.language.isoengen_US
dc.publisherUniversity of California Pressen_US
dc.relation.journalElementa: Science of the Anthropocene
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleFTIR autecological analysis of bottom-ice diatom taxa across a tidal strait in the Canadian Arcticen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)