Isotopic composition of fatty acids derived from sea ice algal communities in Hudson Bay (Southampton Island)
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| Format: | Dataset Open Access |
| Langue: | en |
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PANGAEA
2025
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| _version_ | 1867170442715856896 |
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| author | Graeve, Martin Leu, Eva Fahl, Kirsten Campbell, Karley Brown, Thomas A Welteke, Nahid Adrian-Schütte, Valeria |
| author_facet | Graeve, Martin Leu, Eva Fahl, Kirsten Campbell, Karley Brown, Thomas A Welteke, Nahid Adrian-Schütte, Valeria |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | A spring bloom of algae in or underneath sea ice provides a concentrated food source for aquatic grazers and contributes significantly to marine primary production in many regions of the Arctic. Various types of trophic markers are commonly used to analyze food web structure, based on numerous assumptions about how sea ice algae differ biochemically from phytoplankton. Changes associated with polar amplification of global warming have the potential to affect the phenology, taxonomic composition, productivity, and nutritional value of sea ice algal blooms, which are usually dominated by diatom species. Such changes are likely to have far-reaching effects on trophic interactions and carbon cycling in the ocean. The production of lipids and stable isotope biomarkers by marine algae can vary significantly depending on environmental factors such as snow depth, ice thickness, nutrient availability, and water depth. For example, concentrations of polyunsaturated fatty acids (PUFAs) in ice algae decreased with decreasing nutrient concentrations, and 16:0/16:1 (n-7) fatty acids were highly enriched in 13C in our 2019 study in northwestern Hudson Bay, Southampton Island (possibly as a result of DIC limitation). Data on stable isotope values of fatty acids in ice algae are particularly scarce, so we provide an important information base for future Bayesian isotope mixing models. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_986995 |
| institution | PANGAEA |
| language | en |
| publishDate | 2025 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | Isotopic composition of fatty acids derived from sea ice algal communities in Hudson Bay (Southampton Island) Graeve, Martin Leu, Eva Fahl, Kirsten Campbell, Karley Brown, Thomas A Welteke, Nahid Adrian-Schütte, Valeria 10-CH3A-core-2,3-090519; 11-CH3B-core-1,3-090519; 12-CH3C-core-10,11-090519; 16-CH4B-core-1,2-130519; 17-CH4C-core-9,10-130519; 18-CH4D-core-1,2-130519; 1-CH1C-core-6,9,11-040519; 20-CH5A-core-3,4-160519; 21-CH5B-core-1,2-160519; 22-CH5C-core-5,6-160519; 23-CH5D-core-1,2-160519; 24-CH5F-core-3,4-160519; 25-CH6A-core-3,4-190519; 28-CH6D-core-1,2-190519; 2-CH1F-core-2-040519; 30-CH7A-core-3,4-230519; 31-CH7B-core-1,2-230519; 32-CH7C-core-9,10-230519; 33-CH7D-core-1,2-230519; 34-CH7F-core-3,4-230519; 35-CH8A-core-3,4-260519; 36-CH8B-core-1,2-260519; 37-CH8C-core-5,6-260519; 38-CH8D-core-1,2-260519; 39-CH8F-core-3,4-260519; 3-CH2A-core-2,3-070519; 40-CH9A-core-3,4-290519; 41-CH9B-core-1,2-290519; 42-CH9C-core-6,7-290519; 43-CH9D-core-1,2-290519; 44-CH9F-core-3,4-290519; 45-CH10A-core-3,4-010619; 46-CH10B-core-1,2-010619; 47-CH10C-core-9,10-010619; 48-CH10D-core-1,2-010619; 6,9,12,15-Hexadecatetraenoic acid, δ13C; 6-CH2C-core-6,7-060519; 7-CH2D-core-2,3-060519; all-cis-4,7,10,13,16,19-Docosahexaenoic acid, δ13C; all-cis-5,8,11,14,17-Eicosapentaenoic acid, δ13C; bulk and compound-specific isotope analysis; CHOOSE; cis-9-Hexadecenoic acid, δ13C; Coral Harbour Oceanographic Observation and Sea ice Experiments; Cycle; DATE/TIME; Depth, bathymetric; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; Event label; HBI; Hexadecanoic acid, δ13C; IC; Ice corer; ice cores; IP25; LATITUDE; lipid biomarker; LONGITUDE; Octadecanoic acid, δ13C; Sample ID; Sampling/drilling ice; Sea ice thickness; Site; Snow thickness; Tetradecanoic acid, δ13C; ThermoFisher Scientific Trace GC coupled to a pyrolysis reactor (Isolink) and interfaced to a Thermo Electron Delta V IRMS; trophic markers; Water volume, filtered A spring bloom of algae in or underneath sea ice provides a concentrated food source for aquatic grazers and contributes significantly to marine primary production in many regions of the Arctic. Various types of trophic markers are commonly used to analyze food web structure, based on numerous assumptions about how sea ice algae differ biochemically from phytoplankton. Changes associated with polar amplification of global warming have the potential to affect the phenology, taxonomic composition, productivity, and nutritional value of sea ice algal blooms, which are usually dominated by diatom species. Such changes are likely to have far-reaching effects on trophic interactions and carbon cycling in the ocean. The production of lipids and stable isotope biomarkers by marine algae can vary significantly depending on environmental factors such as snow depth, ice thickness, nutrient availability, and water depth. For example, concentrations of polyunsaturated fatty acids (PUFAs) in ice algae decreased with decreasing nutrient concentrations, and 16:0/16:1 (n-7) fatty acids were highly enriched in 13C in our 2019 study in northwestern Hudson Bay, Southampton Island (possibly as a result of DIC limitation). Data on stable isotope values of fatty acids in ice algae are particularly scarce, so we provide an important information base for future Bayesian isotope mixing models. |
| title | Isotopic composition of fatty acids derived from sea ice algal communities in Hudson Bay (Southampton Island) |
| topic | 10-CH3A-core-2,3-090519; 11-CH3B-core-1,3-090519; 12-CH3C-core-10,11-090519; 16-CH4B-core-1,2-130519; 17-CH4C-core-9,10-130519; 18-CH4D-core-1,2-130519; 1-CH1C-core-6,9,11-040519; 20-CH5A-core-3,4-160519; 21-CH5B-core-1,2-160519; 22-CH5C-core-5,6-160519; 23-CH5D-core-1,2-160519; 24-CH5F-core-3,4-160519; 25-CH6A-core-3,4-190519; 28-CH6D-core-1,2-190519; 2-CH1F-core-2-040519; 30-CH7A-core-3,4-230519; 31-CH7B-core-1,2-230519; 32-CH7C-core-9,10-230519; 33-CH7D-core-1,2-230519; 34-CH7F-core-3,4-230519; 35-CH8A-core-3,4-260519; 36-CH8B-core-1,2-260519; 37-CH8C-core-5,6-260519; 38-CH8D-core-1,2-260519; 39-CH8F-core-3,4-260519; 3-CH2A-core-2,3-070519; 40-CH9A-core-3,4-290519; 41-CH9B-core-1,2-290519; 42-CH9C-core-6,7-290519; 43-CH9D-core-1,2-290519; 44-CH9F-core-3,4-290519; 45-CH10A-core-3,4-010619; 46-CH10B-core-1,2-010619; 47-CH10C-core-9,10-010619; 48-CH10D-core-1,2-010619; 6,9,12,15-Hexadecatetraenoic acid, δ13C; 6-CH2C-core-6,7-060519; 7-CH2D-core-2,3-060519; all-cis-4,7,10,13,16,19-Docosahexaenoic acid, δ13C; all-cis-5,8,11,14,17-Eicosapentaenoic acid, δ13C; bulk and compound-specific isotope analysis; CHOOSE; cis-9-Hexadecenoic acid, δ13C; Coral Harbour Oceanographic Observation and Sea ice Experiments; Cycle; DATE/TIME; Depth, bathymetric; Depth, bottom/max; DEPTH, ice/snow; Depth, top/min; Event label; HBI; Hexadecanoic acid, δ13C; IC; Ice corer; ice cores; IP25; LATITUDE; lipid biomarker; LONGITUDE; Octadecanoic acid, δ13C; Sample ID; Sampling/drilling ice; Sea ice thickness; Site; Snow thickness; Tetradecanoic acid, δ13C; ThermoFisher Scientific Trace GC coupled to a pyrolysis reactor (Isolink) and interfaced to a Thermo Electron Delta V IRMS; trophic markers; Water volume, filtered |
| url | https://doi.org/10.1594/PANGAEA.986995 |