Publication Date:
2023-12-13
Description:
Sub-Arctic marine ecosystems are some of the most productive ecosystems in the world's oceans. The capacity of herbivorous zooplankton, such as Calanus, to biosynthesize and store large amounts of lipids during the short and intense spring bloom is a fundamental adaptation which facilitates the large production in these ecosystems. These energy-rich lipids are rapidly transferred through the food chain to Arctic seals. The fatty acids and stable isotopes from harp seal (Phoca groenlandica) and hooded seal (Cystophora cristata) off East Greenland as well as their potential prey, were analysed. The results were used to describe the lipid dynamics and energy transfer in parts of the East Greenland ecosystem. Even if the two seal species showed considerable overlap in diet and occurred at relatively similar trophic levels, the fatty acid profiles indicated that the bases of the food chains of harp and hooded seals were different. The fatty acids of harp seals originate from diatom-based food chain, whereas the fatty acids of hooded seals originate from dinoflagellate and the prymnesiophyte Phaeocystis pouchetii-based food chain. Stable isotope analyses showed that both species are true carnivores on the top of their food chains, with hooded seal being slightly higher on the food chain than harp seal.
Keywords:
6,9,12,15-Hexadecatetraenoic acid of total fatty acids; 6,9,12-Hexadecatrienoic acid of total fatty acids; 9-Tetradecenoic acid of total fatty acids; all-cis-4,7,10,13,16,19-Docosahexaenoic acid of total fatty acids; all-cis-5,8,11,14,17-Eicosapentaenoic acid of total fatty acids; all-cis-6,9,12,15-Octadecatetraenoic acid of total fatty acids; all-cis-7,10,13,16,19-Docosapentaenoic acid of total fatty acids; all-cis-7,10,13,16-Docosatetraenoic acid of total fatty acids; all-cis-8,11,14,17-Eicosatetraenoic acid of total fatty acids; all-cis-9,12-Octadecadienoic acid of total fatty acids; Area/locality; cis-11-Docosenoic acid of total fatty acids; cis-11-Hexadecenoic acid of total fatty acids (IUPAC: (11Z)-hexadec-11-enoic acid); cis-11-Icosenoic acid of total fatty acids; cis-11-Octadecenoic acid of total fatty acids (IUPAC: Octadec-11-enoic acid); cis-13-Docosenoic acid of total fatty acids; cis-13-Icosenoic acid of total fatty acids; cis-7-Hexadecenoic acid of total fatty acids; cis-9-Hexadecenoic acid of total fatty acids (IUPAC: (9Z)-hexadec-9-enoic acid); cis-9-Icosanoic acid of total fatty acids; cis-9-Octadecenoic acid of total fatty acids (IUPAC: Octadec-9-enoic acid); Date; Denmark_Strait; Denmark Strait; Event label; Fatty acids; Fatty acids, standard deviation; Gas chromatography; Greenland_Sea; Greenland Sea; Heptadecanoic acid of total fatty acids; Hexadecanoic acid of total fatty acids; International Polar Year (2007-2008); ipy; IPY; Jan_Mayen_N; Jan Mayen; Monounsaturated fatty acids of total fatty acids; Octadecanoic acid of total fatty acids; Palmitolenic acid of total fatty acids; Pentadecanoic acid of total fatty acids; Polyunsaturated fatty acids of total fatty acids; Ratio; Sample amount; Saturated fatty acids of total fatty acids; Seas north of Jan Mayen Island; Species; Tetradecanoic acid of total fatty acids
Type:
Dataset
Format:
text/tab-separated-values, 385 data points
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