Water table related variations in the abundance of intact archaeal membrane lipids in a Swedish peat bog.

Abstract:

:The presence and distribution of isoprenoid glycerol dialkyl glycerol tetraethers (GDGTs), lipids that constitute the membranes of Archaea, have been investigated in a 50-cm long core from a Swedish peat bog. In the acrotelm, the periodically water saturated and thus oxic upper layer of the peat bog, only minor amounts of GDGTs were found. These amounts increase considerably in the catotelm, the continuously water saturated and consequently anoxic lower layer of the peat bog. Based on earlier analyses of GDGTs in different settings and on 16S rDNA results from literature, these lipids are likely derived from methanogenic Archaea. Crenarchaeol, previously only found in marine settings and in fresh water lakes, has also been found in this peat bog. Contrary to the other GDGTs, crenarchaeol concentrations remain relatively constant throughout the peat core, suggesting that they are produced by Crenarchaeota thriving in the oxic part of the peat bog and possibly also in the anoxic part.

journal_name

FEMS Microbiol Lett

authors

Weijers JW,Schouten S,van der Linden M,van Geel B,Damsté JS

doi

10.1016/j.femsle.2004.08.012

keywords:

subject

Has Abstract

pub_date

2004-10-01 00:00:00

pages

51-6

issue

1

eissn

0378-1097

issn

1574-6968

pii

S0378-1097(04)00599-3

journal_volume

239

pub_type

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