Menu

Javascript is not activated in your browser. This website needs javascript activated to work properly.
You are here

Bacterial communities in peat in relation to botanical composition as revealed by phospholipid fatty acid analysis

Author:
  • Peter Borga
  • Mats Nilsson
  • Anders Tunlid
Publishing year: 1994-01-01
Language: English
Pages: 841-848
Publication/Series: Soil Biology and Biochemistry
Volume: 26
Issue: 7
Document type: Journal article
Publisher: Elsevier

Abstract english

Analysis of phospholipids extracted from various moss and sedge peat types revealed significant differences in the patterns of the phospholipid fatty acids (PLFA) with respect to the major botanical constituents of the peats. Principal component analysis of the PLFA data showed that peats dominated by Carex residues had higher relative amounts of cyclopropane fatty acids and cis vaccenic fatty acid (18:lω7c), but lower proportions of iso and anteiso methyl branched fatty acids compared to peat types dominated by Sphagnum residues. The data analysis also revealed a larger variation in the PLFA composition among the Sphagnum peats compared to the Carex types, which seems to relate to a larger variation in botanical composition among the Sphagnum than Carex peats. The differences in the fatty acid pattern indicate that the botanical composition influenced the bacterial community with Carex peats having a higher proportion of Gram-negative bacteria but lower proportion of Gram-positive bacteria compared to the Sphagnum peats. An exception was pure Sphagnum peats dominated by the subsection Acutifolia, where the bacterial community showed a closer similarity with the Carex peats. The ratios of trans to cis isomers of the unsaturated fatty acids 16:1 co 7 and 18:1 ω 7 were positively correlated with the degree of decomposition of the peat types, and may be an indication of increased starvation in the bacterial community as the decomposition proceeds.

Keywords

  • Ecology

Other

Published
  • ISSN: 0038-0717
Anders Tunlid
E-mail: anders [dot] tunlid [at] biol [dot] lu [dot] se

Pro dean

Faculty of Science

+46 70 314 00 67

B110

Sölvegatan 27, Lund

39

Professor

MEMEG

+46 46 222 37 57

E-F220

Sölvegatan 37, Lund

50