Naslov
Depth-related cycling of suspended nitrogen- containing lipids in the northeast Atlantic

Autori
Gašparović, Blaženka ; Penezić, Abra ; Lampitt, Richard S. ; Sudasinghe, Nilusha ; Schaub, Tanner

Izvornik
Organic geochemistry (0146-6380) 113 (2017); 55-66

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
nitrogen containing lipids ; lipid cycling ; northeast Atlantic ; FT-ICR MS

Sažetak
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.

Izvorni jezik
Engleski

Znanstvena područja
Kemija

POVEZANOST RADA