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

Gašparović, Blaženka; Penezić, Abra; Lampitt, Richard S.; Sudasinghe, Nilusha; Schaub, Tanner (2017) Depth-related cycling of suspended nitrogen- containing lipids in the northeast Atlantic. Organic Geochemistry, 113 . pp. 55-66. ISSN 0146-6380

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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.

Item Type:	Article
Uncontrolled Keywords:	nitrogen containing lipids ; lipid cycling ; northeast Atlantic ; FT-ICR MS
Subjects:	NATURAL SCIENCES > Chemistry NATURAL SCIENCES > Interdisciplinary Natural Sciences > Marine Science
Divisions:	Division for Marine and Enviromental Research
Projects:	Project title Project leader Project code Project type Utjecaj okolišnog stresa na pojavnost i međudjelovanje biološki važnih organskih molekula i mikronutrijenata u morskom ekosustavu-AMBIOMERES Blaženka Gašparović IP-2013-11-8607 HRZZ
Depositing User:	Blaženka Gašparović
Date Deposited:	21 May 2018 11:44
URI:	http://fulir.irb.hr/id/eprint/4040
DOI:	10.1016/j.orggeochem.2017.07.008

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