Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic
We present the characterization and vertical distribution of suspended particulate lipids containing C, H and O which have the potential to sequester carbon from the upper ocean when associated with sinking particles. Lipids have been shown to be valuable in a host of environments to provide insight...
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ftsouthampton:oai:eprints.soton.ac.uk:403563 2023-07-30T04:05:46+02:00 Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic Gašparović, Blaženka Penezić, Abra Lampitt, Richard S. Sudasinghe, Nilusha Schaub, Tanner 2016-11-20 https://eprints.soton.ac.uk/403563/ English eng Gašparović, Blaženka, Penezić, Abra, Lampitt, Richard S., Sudasinghe, Nilusha and Schaub, Tanner (2016) Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic. Marine Chemistry, 186, 101-109. (doi:10.1016/j.marchem.2016.09.002 <http://dx.doi.org/10.1016/j.marchem.2016.09.002>). Article PeerReviewed 2016 ftsouthampton https://doi.org/10.1016/j.marchem.2016.09.002 2023-07-09T22:12:16Z We present the characterization and vertical distribution of suspended particulate lipids containing C, H and O which have the potential to sequester carbon from the upper ocean when associated with sinking particles. Lipids have been shown to be valuable in a host of environments to provide insights into the sources and processing of organic materials in the oceans. Here we present, direct-infusion, high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) combined with bulk lipid measures for marine lipid characterization. We present the water column distribution of free fatty acids, tri-, di- and monoacylglycerols from the surface layer to abyssopelagic depths (4800 m) for samples collected in the Northeast Atlantic at the Porcupine Abyssal Plain sustained observatory (PAP-SO) (49.0°N, 16.5°W). Triacylglycerols (TG) with even carbon number (TG) and odd carbon number (oddTG, reflecting bacterial origin), were analyzed, while free fatty acids were analyzed as unsaturated (UFA), branched (BrFA) and saturated (SAFA) fatty acids. The surface productive layer (euphotic zone) was characterized with the highest incidence of lipids that are not reported in the Nature Lipidomics Gateway database, especially lipids that are highly unsaturated (acyl chain unsaturation was on average 3.8 for TG, oddTG, UFA and diacylglycerols (DG)). Additionally, we observed high lipid degradation at epipelagic depths. Fatty acid markers indicate that diatoms and dinoflagellates were important contributors to the lipid pool. Depth-resolved lipid change includes decreased lipid abundance and molecular diversity together with substantial loss of unsaturation with increasing depth. The major lipid change occurs at upper mesopelagic depths. Unlike other observed lipids, the abundance of SAFA remained essentially constant down the water column whereas the number of SAFAs and their contribution to total lipids increased with depth. Thus, we demonstrate that lipid saturation affects the export of carbon from the ... Article in Journal/Newspaper Northeast Atlantic University of Southampton: e-Prints Soton Marine Chemistry 186 101 109 |
institution |
Open Polar |
collection |
University of Southampton: e-Prints Soton |
op_collection_id |
ftsouthampton |
language |
English |
description |
We present the characterization and vertical distribution of suspended particulate lipids containing C, H and O which have the potential to sequester carbon from the upper ocean when associated with sinking particles. Lipids have been shown to be valuable in a host of environments to provide insights into the sources and processing of organic materials in the oceans. Here we present, direct-infusion, high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) combined with bulk lipid measures for marine lipid characterization. We present the water column distribution of free fatty acids, tri-, di- and monoacylglycerols from the surface layer to abyssopelagic depths (4800 m) for samples collected in the Northeast Atlantic at the Porcupine Abyssal Plain sustained observatory (PAP-SO) (49.0°N, 16.5°W). Triacylglycerols (TG) with even carbon number (TG) and odd carbon number (oddTG, reflecting bacterial origin), were analyzed, while free fatty acids were analyzed as unsaturated (UFA), branched (BrFA) and saturated (SAFA) fatty acids. The surface productive layer (euphotic zone) was characterized with the highest incidence of lipids that are not reported in the Nature Lipidomics Gateway database, especially lipids that are highly unsaturated (acyl chain unsaturation was on average 3.8 for TG, oddTG, UFA and diacylglycerols (DG)). Additionally, we observed high lipid degradation at epipelagic depths. Fatty acid markers indicate that diatoms and dinoflagellates were important contributors to the lipid pool. Depth-resolved lipid change includes decreased lipid abundance and molecular diversity together with substantial loss of unsaturation with increasing depth. The major lipid change occurs at upper mesopelagic depths. Unlike other observed lipids, the abundance of SAFA remained essentially constant down the water column whereas the number of SAFAs and their contribution to total lipids increased with depth. Thus, we demonstrate that lipid saturation affects the export of carbon from the ... |
format |
Article in Journal/Newspaper |
author |
Gašparović, Blaženka Penezić, Abra Lampitt, Richard S. Sudasinghe, Nilusha Schaub, Tanner |
spellingShingle |
Gašparović, Blaženka Penezić, Abra Lampitt, Richard S. Sudasinghe, Nilusha Schaub, Tanner Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
author_facet |
Gašparović, Blaženka Penezić, Abra Lampitt, Richard S. Sudasinghe, Nilusha Schaub, Tanner |
author_sort |
Gašparović, Blaženka |
title |
Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
title_short |
Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
title_full |
Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
title_fullStr |
Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
title_full_unstemmed |
Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic |
title_sort |
free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the northeast atlantic |
publishDate |
2016 |
url |
https://eprints.soton.ac.uk/403563/ |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Gašparović, Blaženka, Penezić, Abra, Lampitt, Richard S., Sudasinghe, Nilusha and Schaub, Tanner (2016) Free fatty acids, tri-, di- and monoacylglycerol production and depth-related cycling in the Northeast Atlantic. Marine Chemistry, 186, 101-109. (doi:10.1016/j.marchem.2016.09.002 <http://dx.doi.org/10.1016/j.marchem.2016.09.002>). |
op_doi |
https://doi.org/10.1016/j.marchem.2016.09.002 |
container_title |
Marine Chemistry |
container_volume |
186 |
container_start_page |
101 |
op_container_end_page |
109 |
_version_ |
1772817910987751424 |