Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone
There are major gaps in our understanding of the distribution and role of lipids in the open ocean especially with regard to sulfur-containing lipids (S-lipids). Here, we employ a powerful analytical approach based on high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-IC...
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ftnerc:oai:nora.nerc.ac.uk:519861 2023-05-15T17:41:38+02:00 Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone Gašparović, Blaženka Penezić, Abra Frka, Sanja Kazazić, Saša Lampitt, Richard S. Holguin, F. Omar Sudasinghe, Nilusha Schaub, Tanner 2018 http://nora.nerc.ac.uk/id/eprint/519861/ https://doi.org/10.1016/j.dsr.2018.03.007 unknown Gašparović, Blaženka; Penezić, Abra; Frka, Sanja; Kazazić, Saša; Lampitt, Richard S.; Holguin, F. Omar; Sudasinghe, Nilusha; Schaub, Tanner. 2018 Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone. Deep Sea Research Part I: Oceanographic Research Papers, 134. 12-22. https://doi.org/10.1016/j.dsr.2018.03.007 <https://doi.org/10.1016/j.dsr.2018.03.007> Publication - Article PeerReviewed 2018 ftnerc https://doi.org/10.1016/j.dsr.2018.03.007 2023-02-04T19:46:28Z There are major gaps in our understanding of the distribution and role of lipids in the open ocean especially with regard to sulfur-containing lipids (S-lipids). Here, we employ a powerful analytical approach based on high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to elucidate depth-related S-lipid production and molecular transformations in suspended particulate matter from the Northeast Atlantic Ocean in this depth range. We show that within the open-ocean environment S-lipids contribute up to 4.2% of the particulate organic carbon, and that up to 95% of these compounds have elemental compositions that do not match those found in the Nature Lipidomics Gateway database (termed “novel”). Among the remaining 5% of lipids that match the database, we find that sulphoquinovosyldiacylglycerol (SQDG) are efficiently removed while sinking through the mesopelagic zone. The relative abundance of other assigned lipids (sulphoquinovosylmonoacylglycerol (SQMG), sulfite and sulfate lipids, Vitamin D2 and D3 derivatives, and sphingolipids) did not change substantially with depth. The novel S-lipids, represented by hundreds of distinct elemental compositions (160–300 molecules at any one depth), contribute increasingly to the lipid and particulate organic matter pools with increased depth. Depth-related transformations cause (i) incomplete degradation/transformation of unsaturated S-lipids which leads to the depth-related accumulation of the refractory saturated compounds with reduced molecular weight (average 455 Da) and (ii) formation of highly unsaturated S-lipids (average abyssopelagic molecular double bond equivalents, DBE=7.8) with lower molecular weight (average 567 Da) than surface S-lipids (average 592 Da). A depth-related increase in molecular oxygen content is observed for all novel S-lipids and indicates that oxidation has a significant role in their transformation while (bio)hydrogenation possibly impacts the formation of saturated compounds. The instrumentation approach ... Article in Journal/Newspaper Northeast Atlantic Natural Environment Research Council: NERC Open Research Archive Deep Sea Research Part I: Oceanographic Research Papers 134 12 22 |
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Open Polar |
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Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
unknown |
description |
There are major gaps in our understanding of the distribution and role of lipids in the open ocean especially with regard to sulfur-containing lipids (S-lipids). Here, we employ a powerful analytical approach based on high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to elucidate depth-related S-lipid production and molecular transformations in suspended particulate matter from the Northeast Atlantic Ocean in this depth range. We show that within the open-ocean environment S-lipids contribute up to 4.2% of the particulate organic carbon, and that up to 95% of these compounds have elemental compositions that do not match those found in the Nature Lipidomics Gateway database (termed “novel”). Among the remaining 5% of lipids that match the database, we find that sulphoquinovosyldiacylglycerol (SQDG) are efficiently removed while sinking through the mesopelagic zone. The relative abundance of other assigned lipids (sulphoquinovosylmonoacylglycerol (SQMG), sulfite and sulfate lipids, Vitamin D2 and D3 derivatives, and sphingolipids) did not change substantially with depth. The novel S-lipids, represented by hundreds of distinct elemental compositions (160–300 molecules at any one depth), contribute increasingly to the lipid and particulate organic matter pools with increased depth. Depth-related transformations cause (i) incomplete degradation/transformation of unsaturated S-lipids which leads to the depth-related accumulation of the refractory saturated compounds with reduced molecular weight (average 455 Da) and (ii) formation of highly unsaturated S-lipids (average abyssopelagic molecular double bond equivalents, DBE=7.8) with lower molecular weight (average 567 Da) than surface S-lipids (average 592 Da). A depth-related increase in molecular oxygen content is observed for all novel S-lipids and indicates that oxidation has a significant role in their transformation while (bio)hydrogenation possibly impacts the formation of saturated compounds. The instrumentation approach ... |
format |
Article in Journal/Newspaper |
author |
Gašparović, Blaženka Penezić, Abra Frka, Sanja Kazazić, Saša Lampitt, Richard S. Holguin, F. Omar Sudasinghe, Nilusha Schaub, Tanner |
spellingShingle |
Gašparović, Blaženka Penezić, Abra Frka, Sanja Kazazić, Saša Lampitt, Richard S. Holguin, F. Omar Sudasinghe, Nilusha Schaub, Tanner Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
author_facet |
Gašparović, Blaženka Penezić, Abra Frka, Sanja Kazazić, Saša Lampitt, Richard S. Holguin, F. Omar Sudasinghe, Nilusha Schaub, Tanner |
author_sort |
Gašparović, Blaženka |
title |
Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
title_short |
Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
title_full |
Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
title_fullStr |
Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
title_full_unstemmed |
Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone |
title_sort |
particulate sulfur-containing lipids: production and cycling from the epipelagic to the abyssopelagic zone |
publishDate |
2018 |
url |
http://nora.nerc.ac.uk/id/eprint/519861/ https://doi.org/10.1016/j.dsr.2018.03.007 |
genre |
Northeast Atlantic |
genre_facet |
Northeast Atlantic |
op_relation |
Gašparović, Blaženka; Penezić, Abra; Frka, Sanja; Kazazić, Saša; Lampitt, Richard S.; Holguin, F. Omar; Sudasinghe, Nilusha; Schaub, Tanner. 2018 Particulate sulfur-containing lipids: Production and cycling from the epipelagic to the abyssopelagic zone. Deep Sea Research Part I: Oceanographic Research Papers, 134. 12-22. https://doi.org/10.1016/j.dsr.2018.03.007 <https://doi.org/10.1016/j.dsr.2018.03.007> |
op_doi |
https://doi.org/10.1016/j.dsr.2018.03.007 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
134 |
container_start_page |
12 |
op_container_end_page |
22 |
_version_ |
1766143299755704320 |