Morphology and chemical composition of a natural population of an ice-associated Antarctic diatom Navicula glacei

Whitaker, Terence M.; Richardson, Michael G.. 1980 Morphology and chemical composition of a natural population of an ice-associated Antarctic diatom Navicula glacei. Journal of Phycology, 16 (2). 250-257. https://doi.org/10.1111/j.1529-8817.1980.tb03027.x

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Abstract/Summary

During winter (1973), a very pure natural population of the diatom Navicula glaciei Van Heurck occurred in dense concentrations (up to 244 mg·m−2 chlorophyll a) in the sea ice at Signy Island, South Orkneys, Antarctica. Samples of algal material were collected for subsequent chemical analysis. The diatom had a composition of 33.77% ash, 21.81% lipid, 25.38% crude, protein, 19.04% crude carbohydrate and an intact calorific value of 15.384 KJ·g−1. Carbon, hydrogen, nitrogen and phosphorus formed 34, 5.3, 4.1 and 0.52% dry wt respectively. The material was analysed for the trace elements Na, K, Fe, Ca, Mg, Al, Zn, Cu, Pb, Mn, 137Cs. Fatty acid composition was dominated by 16:0 palmitic acid (20.46%), 16:1 palmitoleic acid (32.86%), and 20:5 docosahexaenoic acid (19.33%). To supplement a very scanty original description, a full taxonomic description is given in the text.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.1111/j.1529-8817.1980.tb03027.x
ISSN:	0022-3646
Additional Keywords:	Antarctic diatom, chemical composition, diatom, ice-associated diatom, Navicula
Date made live:	11 Sep 2019 11:03 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/525066

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