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Titre du document / Document title

Lipids and fatty acids in ice algae and phytoplankton from the Marginal Ice Zone in the Barents Sea

Auteur(s) / Author(s)

FALK-PETERSEN S. (1) ; SARGENT J. R. (2) ; HENDERSON J. (2) ; HEGSETH E. N. (3) ; HOP H. (1) ; OKOLODKOV Y. B. (4) ;

Affiliation(s) du ou des auteurs / Author(s) Affiliation(s)

(1) Norwegian Polar Institute (NP), 9005 Tromsø, NORVEGE
(2) NERC Unit of Aquatic Biochemistry, University of Stirling, Stirling FK9 4LA, ROYAUME-UNI
(3) Norwegian College of Fishery Science, University of Tromsø, 9037 Tromsø, NORVEGE
(4) Komarov Botanical Institute, Russian Academy of Science, Prof. Popov St., St. Petersburg 197376, RUSSIE, FEDERATION DE

Résumé / Abstract

Samples of ice algae from the Marginal Ice Zone in the Barents Sea could be divided into two categories : one dominated by assemblages of Melosira arctica, and the other dominated by Nitzschia frigida and associated diatoms. Total lipid from the Melosira assemblages consisted of approximately equal amounts of polar lipids and triacylglycerols. Total lipid from the Nitzschia assemblages contained more triacylglycerols than polar lipids. Total lipid from the Melosira assemblages had higher percentages of C16 6 PUFA, especially 16:4(n-1) and 20:5(n-3), than that from the Nitzschia assemblages, this reflecting the higher percentages of both C16 PUFA and 20:5(n-3) in polar lipids than in triacylglycerols. Phytoplankton from the pelagic zone were richer in flagellates and contained less C1 6 PUFA and 20:5(n-3) but more C18 PUFA and 22:6(n-3). The dominance of diatoms in the ice-algae assemblages in the Marginal Ice Zone and their high nutritional value as a source of 20:5(n-3) for higher trophic levels are emphasised.

Revue / Journal Title

Polar biology    ISSN  0722-4060   CODEN POBIDP 

Source / Source

1998, vol. 20, no1, pp. 41-47 (38 ref.)

Langue / Language

Anglais

Editeur / Publisher

Springer, Heidelberg, ALLEMAGNE  (1982) (Revue)

Mots-clés anglais / English Keywords

Lipids

;

Fatty acids

;

Sea ice

;

Phytoplankton

;

Barents Sea

;

Chemical composition

;

Trophic relation

;

Arctic Region

;

Ecosystem

;

Algae

;

Environmental factor

;

Arctic Ocean

;

Thallophyta

;

Polar region

;

Marine environment

;

Mots-clés français / French Keywords

Lipide

;

Acide gras

;

Glace marine

;

Phytoplancton

;

Mer de Barents

;

Composition chimique

;

Relation trophique

;

Arctique

;

Ecosystème

;

Algae

;

Facteur milieu

;

Océan Arctique

;

Thallophyta

;

Zone polaire

;

Milieu marin

;

Mots-clés espagnols / Spanish Keywords

Lípido

;

Acido graso

;

Hielo marino

;

Fitoplancton

;

Mar de Barents

;

Composición química

;

Relación trófica

;

Ártico

;

Ecosistema

;

Algae

;

Factor medio

;

Océano Ártico

;

Thallophyta

;

Zona polar

;

Medio marino

;

Localisation / Location

INIST-CNRS, Cote INIST : 19228, 35400007227979.0050

Nº notice refdoc (ud4) : 2356641



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