Fatty acids and stable isotope signatures of first-year and multiyear sea ice in the Canadian High Arctic
Bibliographic Data
| ID | 19569064 |
|---|---|
| Authors | Doreen Kohlbach (0000-0002-9245-2500, Fisheries and Oceans Canada), Steven W Duerksen (Fisheries and Oceans Canada), Benjamin Allen Lange (0000-0003-4534-8978, Fisheries and Oceans Canada), Joannie Charette (Fisheries and Oceans Canada), Anke Reppchen (Fisheries and Oceans Canada), Pascal Tremblay (0000-0001-8215-3913), Karley Campbell (0000-0001-5008-0705, University of Bristol), Karley L Campbell, Steven H Ferguson (0000-0002-3794-0122, Fisheries and Oceans Canada), Christine Michel (0000-0001-6150-4825, Fisheries and Oceans Canada) |
| Year | 2020 |
| Volume | 8 |
| Issue | 1 |
| Publication date | 2020-12-21 |
| Peer Reviewed | Yes |
| Open Access | Yes |
| Type | ARTICLE |
| Venue | Elementa Science of the Anthropocene (JOURNAL) |
| Journal identifiers | ISSN: 2325-1026 • E-ISSN: 2325-1026 |
| Publisher | University of California Press (PUBLISHER • US) |
| DOI | 10.1525/elementa.2020.054 |
| OpenAlex | W3119557755 |
| Language | EN |
| Citations received | 1 |
| References cited | 91 |
Ice algae are critical components to the lipid-driven Arctic marine food web, particularly early in the spring. As little is known about these communities in multiyear ice (MYI), we aimed to provide a baseline of fatty acid (FA) and stable isotope signatures of sea-ice communities in MYI from the Lincoln Sea and compare these biomarkers to first-year ice (FYI). Significant differences in the relative proportions of approximately 25% of the identified FAs and significantly higher nitrogen stable isotope values (δ15N) in bottom-ice samples of FYI (δ15N = 6.4 ± 0.7%) compared to MYI (δ15N = 5.0 ± 0.4%) reflect different community compositions in the two ice types. Yet, the relative proportion of diatom- and dinoflagellate-associated FAs, as well as their bulk and most of the FA-specific carbon stable isotope compositions (δ13C) were not significantly different between bottom FYI (bulk δ13C: –28.4% to –26.7%, FA average δ13C: –34.4% to –31.7%) and MYI (bulk δ13C: –27.6% to –27.2%, FA average δ13C: –33.6% to –31.9%), suggesting at least partly overlapping community structures and similar biochemical processes within the ice. Diatom-associated FAs contributed, on average, 28% and 25% to the total FA content of bottom FYI and MYI, respectively, indicating that diatoms play a central role in structuring sea-ice communities in the Lincoln Sea. The differences in FA signatures of FYI and MYI support the view that different ice types harbor different inhabitants and that the loss of Arctic MYI will impact complex food web interactions with ice-associated ecosystems. Comparable nutritional quality of FAs, however, as indicated by similar average levels of polyunsaturated FAs in bottom FYI (33%) and MYI (28%), could help to ensure growth and reproduction of ice-associated grazers despite the shift from a MYI to FYI-dominated sea-ice cover with ongoing climate warming
Algae · Arctic · Arctic ice pack · Biology · Diatom · Dinoflagellate · Food web · Ice core · Isotopes of carbon · Physics · Sea ice · Stable isotope ratio · Total organic carbon · Trophic level · δ13C · δ15N · Chemistry · Environmental Science · Isotope Analysis in Ecology · Marine and coastal ecosystems · Marine Bivalve and Aquaculture Studies · Ecology · Environmental Chemistry · Geology · Oceanography
| Unique citing works | 1 |
|---|---|
| Citations per year | 0.5 |
| Citation span | 2024 - 2024 (1) |
| Citation velocity | recent |
| Highly cited | No |
| Citation types | Neutral: 1 |