Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5161333 | Organic Geochemistry | 2017 | 45 Pages |
Abstract
We utilized high resolution Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) to describe the depth-dependent distribution and molecular nature of nitrogen containing lipids (N-lipids) from suspended particles in an oceanic environment. Samples were collected at the Porcupine Abyssal Plain (PAP) sustained observatory in the northeast Atlantic (49.0°N, 16.5°W). Approximately 12.5% of FT-ICR MS observed lipids contain N. Only 19% of the lipids we recorded have elemental compositions that match those in the Nature Lipidomics Gateway database. Our results illustrate: (i) the proportional and selective accumulation of N-lipids with increased depth; (ii) that N-lipids which contain phosphorus are more stable than those without P; (iii) the majority of the deep Atlantic unsaturated N-lipids are highly unsaturated and (iv) there is depth-related increase in the saturated N-lipids which indicates that saturation is an important process for the export of lipid N and C to the deep ocean. These observations provide a description of N-lipid characteristics, transformation and preservation potential through the water column in the mesotrophic area of the North Atlantic Ocean.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Organic Chemistry
Authors
Blaženka GaÅ¡paroviÄ, Abra PeneziÄ, Richard S. Lampitt, Nilusha Sudasinghe, Tanner Schaub,