Lipid content in overwintering Calanus finmarchicus across the Subpolar Eastern North Atlantic Ocean
Jónasdóttir, Sigrún Huld and Wilson, Robert J. and Gislason, Astthor and Heath, Michael R. (2019) Lipid content in overwintering Calanus finmarchicus across the Subpolar Eastern North Atlantic Ocean. Limnology and Oceanography, 64 (5). pp. 2029-2043. ISSN 0024-3590 (https://doi.org/10.1002/lno.11167)
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Abstract
The boreal copepod Calanus finmarchicus accumulates lipid reserves during summer feeding in surface ocean waters, which enable it to stay at depth and survive famine during overwintering. Respiration of lipids during prolonged overwintering at ocean depths (> 1000 m in some areas) has been shown to result in a net sequestration of carbon into the deep ocean: the so-called “lipid pump.” Here, we provide a comprehensive synthesis of the geographic and vertical variations in lipid content of overwintering animals across the Subpolar Eastern North Atlantic and, on the basis of this, we revise the estimates of carbon sequestration. Wax ester content ranged from 40 to 190 μg individual −1 at > 250 m depths, with highest concentrations in the coldest (< 0°C) waters at 400–600 m depth at the slope east of Faroe Islands and east of Greenland and lowest in the warmer (> 4°C) Irminger Sea and Rockall Basin. Our new analysis results in about 44% higher estimates of carbon sequestration at up to 11.5 g C m −2.
ORCID iDs
Jónasdóttir, Sigrún Huld, Wilson, Robert J. ORCID: https://orcid.org/0000-0002-0592-366X, Gislason, Astthor and Heath, Michael R. ORCID: https://orcid.org/0000-0001-6602-3107;-
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Item type: Article ID code: 67295 Dates: DateEvent30 September 2019Published26 March 2019Published Online13 March 2019AcceptedSubjects: Agriculture > Aquaculture. Fisheries. Angling
Science > MathematicsDepartment: Faculty of Science > Mathematics and Statistics Depositing user: Pure Administrator Date deposited: 14 Mar 2019 09:48 Last modified: 28 Nov 2024 01:18 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/67295