Articles | Volume 22, issue 11
https://doi.org/10.5194/bg-22-2517-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/bg-22-2517-2025
© Author(s) 2025. This work is distributed under
the Creative Commons Attribution 4.0 License.
the Creative Commons Attribution 4.0 License.
Research article
| 
04 Jun 2025
Research article |
| 04 Jun 2025
| 04 Jun 2025
Sea-ice-associated algae and zooplankton fecal pellets fuel organic particle export in the seasonally ice-covered northwestern Labrador Sea
Department of Earth and Environmental Sciences, Dalhousie University, Halifax, Nova Scotia, Canada
Thibaud Dezutter
Amundsen Science, Université Laval, Québec City, Quebec, Canada
David Cote
Fisheries and Oceans Canada, Northwest Atlantic Fisheries Centre, St. John's, Newfoundland and Labrador, Canada
Catherine Lalande
Amundsen Science, Université Laval, Québec City, Quebec, Canada
Evan Edinger
Department of Geography, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
Department of Biology, Memorial University of Newfoundland, St. John's, Newfoundland and Labrador, Canada
Owen A. Sherwood
Department of Earth and Environmental Sciences, Dalhousie University, Halifax, Nova Scotia, Canada
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Short summary
The origins and composition of sinking organic matter are still understudied for the oceans, especially in ice-covered areas. We use amino acid stable isotopes combined with particle flux and plankton taxonomy to investigate the sources and composition of exported organic matter from a sediment-trap-derived time series of sinking particles in the northwestern Labrador Sea. We found that sea-ice algae and fecal pellets may be important contributors to the sinking fluxes of carbon and nitrogen.
The origins and composition of sinking organic matter are still understudied for the oceans,...
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