Bacterial diversity and fatty acid composition of hypersaline cyanobacterial mats from an inland desert wadi

Raeid M M Abed, Tatiana Klempová, Peter Gajdoš, Milan Čertík

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Hypersaline cyanobacterial mats are infrequently reported in desert streams and information on such mats is very scarce. We investigated bacterial diversity and fatty acid composition in hypersaline cyanobacterial mats from Wadi Muqshin, located inland near the Empty Quarter desert in Oman. Most of the detected cyanobacteria belonged to known halotolerant, thermotolerant and UV resistant types that were typically reported in other hypersaline mats. A total of 84,834 ribosomal sequences were obtained, with 62-79% of the sequences affiliated to Cyanobacteria, Proteobacteria, Bacteroidetes, Clostridia and Chloroflexi. Cluster analysis showed that Mat 5 with the highest salinity was profoundly different from the other mats and shared species were ≤72% between all mats. While most Deltaproteobacteria in the wadi mats belonged to sulfate-reducing bacteria, a number of sequences related to purple sulfur, purple non-sulfur as well as green no-sulfur bacteria were also detected. Different saturated, branched and mono- and di-unsaturated fatty acids were detected in all mats, with the saturated 16:0 and 18:0 and the monounsaturated 16:1 and 18:1 fatty acids accounting for relative amounts of 70-77% of total fatty acids. We conclude that microbial diversity and fatty acids composition in the desert wadi hypersaline cyanobacterial mats resemble their counterparts from other hypersaline environments.

Original languageEnglish
Pages (from-to)81-89
Number of pages9
JournalJournal of Arid Environments
Volume115
DOIs
Publication statusPublished - Apr 1 2015

Fingerprint

deserts
fatty acid
desert
fatty acid composition
Cyanobacteria
sulfur
fatty acids
delta-Proteobacteria
sulfate-reducing bacteria
Oman
Proteobacteria
cyanobacterium
unsaturated fatty acids
cluster analysis
hypersaline environment
salinity
sulfate-reducing bacterium
bacteria
bacterium
Bacteroidetes

Keywords

  • Cyanobacteria
  • Cyanobacterial mats
  • Desert
  • Fatty acids
  • Pyrosequencing
  • Wadi

ASJC Scopus subject areas

  • Ecology, Evolution, Behavior and Systematics
  • Earth-Surface Processes
  • Ecology

Cite this

Bacterial diversity and fatty acid composition of hypersaline cyanobacterial mats from an inland desert wadi. / Abed, Raeid M M; Klempová, Tatiana; Gajdoš, Peter; Čertík, Milan.

In: Journal of Arid Environments, Vol. 115, 01.04.2015, p. 81-89.

Research output: Contribution to journalArticle

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