Universität zu Köln

Rethemeyer, Janet ORCID: 0000-0001-6698-4186, Schubotz, Florence, Talbot, Helen M., Cooke, Martin P., Hinrichs, Kai-Uwe ORCID: 0000-0002-0739-9291 and Mollenhauer, Gesine ORCID: 0000-0001-5138-564X (2010). Distribution of polar membrane lipids in permafrost soils and sediments of a small high Arctic catchment. Org. Geochem., 41 (10). S. 1130 - 1146. OXFORD: PERGAMON-ELSEVIER SCIENCE LTD. ISSN 0146-6380

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Abstract

The distribution of bacteriohopanepolyols (BHPs) and intact polar membrane lipids (IPLs) was studied in different soil profiles and in fluvial and marine sediments along the pathway of transport in a small catchment in the high Arctic at Ny-Alesund, Svalbard (79 degrees N, 12 degrees E). Both groups of cellular membrane lipids have been used as biomarkers for determining major microbial groups and biogeochemical processes in natural environments. Little is known about their distribution and usefulness as environmental markers in the Arctic. In this study, we show that both membrane lipid groups are variably distributed in the drainage area of the Broggerbreen Glacier, with highest abundance and diversity in the organic mat overlying the mineral soils, as well as in mossy surface soil. The BHP and IPL composition and abundance both indicate a larger community of phototrophic bacteria in the organic mats and fluvial sediments. The greater diversity and abundance of BHPs relative to IPLs in sub-soils, including probable markers for cyanobacteria, suggest a greater resistance to degradation. In contrast, IPL concentration decreased strongly with soil depth, pointing to their rapid degradation. Bacterial IPLs are thus thought to reflect more reliably the biomass of viable phototrophic bacteria. The high concentrations of proposed soil marker BHPs, adenosylhopane and related structures vs. published results and their relative increase with soil depth suggest better preservation and more effective accumulation of the compounds at low temperature. (C) 2010 Elsevier Ltd. All rights reserved.

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Rethemeyer, Janet UNSPECIFIED orcid.org/0000-0001-6698-4186 UNSPECIFIED Schubotz, Florence UNSPECIFIED UNSPECIFIED UNSPECIFIED Talbot, Helen M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Cooke, Martin P. UNSPECIFIED UNSPECIFIED UNSPECIFIED Hinrichs, Kai-Uwe UNSPECIFIED orcid.org/0000-0002-0739-9291 UNSPECIFIED Mollenhauer, Gesine UNSPECIFIED orcid.org/0000-0001-5138-564X UNSPECIFIED
URN:	urn:nbn:de:hbz:38-496126
DOI:	10.1016/j.orggeochem.2010.06.004
Journal or Publication Title:	Org. Geochem.
Volume:	41
Number:	10
Page Range:	S. 1130 - 1146
Date:	2010
Publisher:	PERGAMON-ELSEVIER SCIENCE LTD
Place of Publication:	OXFORD
ISSN:	0146-6380
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language TRAP MASS-SPECTROMETRY; FATTY-ACIDS; BACTERIAL-POPULATIONS; BACTERIOHOPANEPOLYOL SIGNATURES; METHANOTROPHIC BACTERIA; MICROBIAL COMMUNITIES; SUBSURFACE SEDIMENTS; NITROGEN-FIXATION; ORGANIC-MATTER; HOPANE SERIES Multiple languages Geochemistry & Geophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/49612