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Lipids of recently-deposited algal mats at Laguna Mormona, Baja CaliforniaA preliminary survey of the lipid composition of the core of a recently deposited algal mat of a subtropical, hypersaline coastal pond is described. Two layers of the core were examined: the upper, 2-cm-thick layer, comprising the fresh algal mat of predominantly the blue-green species Microcoleus chthonoplastes, and the black anaerobic algal ooze at a depth of 10 cm. About 75% of the n-alkanes in the mat were accounted for by n-C17, with smaller amounts of higher homologues maximizing at n-C27. The ooze was characterized by a bimodal distribution with maxima at n-C17 and n-C27. The n-alkanoic acids distributions were similar to the corresponding n-alkane distributions. A marked decrease in the ratio of monounsaturated to saturated acids in the ooze relative to the mat was observed, which indicates a preferential removal of unsaturated components. Certain triterpenes of the hopane skeletal type were present in the mat and ooze. The presence of stanols and sterenes in the ooze with similar carbon number distributions suggests a relationship between them.
Document ID
19770027856
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Cardoso, J.
(Bristol Univ. United Kingdom)
Brooks, P. W.
(Bristol Univ. United Kingdom)
Eglinton, G.
(Bristol Univ. United Kingdom)
Goodfellow, R.
(Bristol Univ. United Kingdom)
Maxwell, J. R.
(Bristol, University Bristol, United Kingdom)
Philp, R. P.
(California, University Berkeley, Calif., United States)
Date Acquired
August 8, 2013
Publication Date
January 1, 1976
Subject Category
Geosciences (General)
Meeting Information
Meeting: International Symposium on Environmental biogeochemistry. Volume 1 - Carbon, nitrogen, phosphorus, sulfur and selenium cycles
Location: Burlington, Ontario
Country: Canada
Start Date: April 8, 1975
End Date: April 11, 1975
Sponsors: Geochemical Society, UNESCO, Canada Centre for Inland Waters, Canadian Society of Microbiologists, International Association of Geochemistry and Cosmochemistry
Accession Number
77A10708
Funding Number(s)
CONTRACT_GRANT: NERC-GR/3/2420
CONTRACT_GRANT: NGL-05-003-003
Distribution Limits
Public
Copyright
Other

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