Novel and Unexpected Prokaryotic Diversity in Water and Sediments of the Alkaline, Hypersaline Lakes of the Wadi An Natrun, Egypt

Mesbah, Noha M.; Abou-El-Ela, Soad H.; Wiegel, Juergen

doi:10.1007/s00248-007-9338-7

Cited by 28 publications

(40 citation statements)

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“…By contrast, studies of soda lakes, which comprise most of the reports on the diversity of hypersaline sediments, typically have detectable levels of Deltaproteobacteria (e.g., SRBs), but are more often dominated by member of the Firmicutes (e.g., Clostridia) (Jiang et al, 2006;Mesbah et al, 2007;Dimitriu et al, 2008;Foti et al, 2008). We found this group to comprise only a few sequences in one of the two sediment samples from the Salton Sea.…”

Section: Sediment Community Diversitymentioning

confidence: 66%

“…Other studies in hypersaline lakes have found low G ? C gram-positives (Firmicutes) to be abundant (up to 25% of libraries) (Mesbah et al, 2007), whereas we saw very few in the Salton Sea.…”

Section: Discussionmentioning

confidence: 96%

“…Molecular diversity (primarily 16S rRNA-based) studies of bacterioplankton communities have been performed in coastal marine environments for many years revealing the great diversity of cultured and uncultured lineages (Britschgi & Giovanonni, 1991;Fuhrman et al, 1993;Rappé et al, 1997;Rappé et al, 2000;Suzuki et al, 2001;Kirchman et al, 2005). More recently, a number of similar studies from hypersaline habitats have been reported (Jones et al, 1998;Anton et al, 2000;Ward et al, 2000;Hollibaugh et al, 2001;Humayoun et al, 2003;Demergasso et al, 2004;Ma et al, 2004;Rees et al, 2004;Jiang et al, 2006;Mesbah et al, 2007). Some studies have even examined microbial diversity along salinity gradients in estuaries and salterns Casamayor et al, 2002;Crump et al, 2004).…”

Section: Introductionmentioning

confidence: 93%

“…Studies in the meromictic Mono Lake, CA, detected changes in the microbial community with depth, with increased diversity in the anoxic bottom waters (Hollibaugh et al, 2001;Humayoun et al, 2003). Another recent study in Egyptian lakes reported significant differences in community composition between the sediment and the overlying water column (Mesbah et al, 2007). However, these study sites were in athalassohaline systems with significantly higher pH (i.e., soda lakes) and/or salinity than the Salton Sea.…”

Section: Introductionmentioning

confidence: 96%

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Seasonal changes in bacterial diversity in the Salton Sea

2009

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The Salton Sea is a large, shallow, endorheic, polymictic, saline lake in Southern California sustained by runoff from local agricultural and municipal wastewater. As a closed-basin lake in an arid region with declining water supply, it is becoming increasingly saline. Due to its eutrophic status and episodic wind-driven mixing, basin-wide anoxia events are becoming more common during summer. Sequencing of 16S rRNA gene clones obtained from the water column and sediments provided the first molecular assessment of bacterial community structure in the Salton Sea. Similar to other saline habitats, the water column community was dominated by Gamma-and Alphaproteobacteria, and Bacteroidetes, although there was significant seasonal variability in diversity, richness, and the specific genera recovered. Sediments showed high diversity and richness and were dominated by sequences from cultured and uncultured phyla typical of marine sediments, especially the Deltaproteobacteria. This study has provided baseline data about the bacterial communities found in this important California water body and may serve as important indicators of change as the lake becomes increasingly saline over time or as remediation efforts are enacted.

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Section: Sediment Community Diversitymentioning

confidence: 66%

Section: Discussionmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 96%

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Seasonal changes in bacterial diversity in the Salton Sea

2009

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“…They are distributed globally and are represented by a wide range of ecosystem types, such as salt lakes, soda lakes, hypersaline springs, salt flats, playas, solar salterns, and ancient salt deposits (McGenity et al 2000;Oren 2002;Ventosa et al 2008). Research on these ecosystems has not only revealed the presence of diverse microbial communities representing all three domains of life (Oren 2002;Ventosa et al 2008;Caton 2004;Nicholson and Fathepure 2005) but also enzymes with enhanced biotechnological applications (Oren 2002;Caton 2004;Humayoun et al 2003;Ley et al 2006;Mesbah et al 2008). The majority of studies on the various hypersaline areas of the world primarily focus on aquatic communities (Oren 2002;Humayoun et al 2003;Demergasso et al2004;Mutlu et al 2008;Ghai et al 2011;Narasingarao et al 2012;Gomariz et al 2015) and microbial mats (Humayoun et al 2003;Moune et al 2003), whereas far fewer attempts have been made to characterise hypersaline soils and sediments (Ventosa et al 2008;Mesbah et al a transitional area between marine and terrestrial ecosystems.…”

Section: Introductionmentioning

confidence: 99%

A snapshot of microbial communities from the Kutch: one of the largest salt deserts in the World

et al. 2015

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Here we present the first report on the taxonomic diversity of the microbial communities of the saline desert of the Great Rann of Kutch, Gujarat, India, using a metagenomic approach. Seven samples, differing in salinity levels and covering different seasons, were analysed to investigate the dynamics of microbial communities in relation to salinity and season. Metagenomic data generated using whole metagenome sequencing revealed that despite its very high salinity (4.11-30.79 %), the saline desert's microbiota had a rich microbial diversity that included all major phyla. Notably, 67 archaeal genera, representing more than 60 % of all known archaeal genera, were present in this ecosystem. A strong positive correlation (0.85) was observed between the presence of the extremely halophilic bacterium Salinibacter and salinity level. Taxonomic and functional comparisons of the saline desert metagenome with those of other publicly available metagenomes (i.e. sea, hypersaline lagoon, solar saltern, brine, hot desert) was carried out. The microbial community of the Kutch was found to be unique yet more similar to the sea biomes followed by hypersaline lagoon.

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Comparative molecular analysis of the prokaryotic diversity of two salt mine soils in southwest China

Xiao

Wang

et al. 2013

J. Basic Microbiol.

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While much is known about the microbial diversity in some hypersaline environments, little is known about those of salt mine tunnel soils. The objective of this study was to conduct a comprehensive phylogenetic comparison of the archaeal and bacterial communities present in Yipinglang salt mine (YPL) and Qiaohou salt mine (QH) tunnels differing in salinity and salt composition using 16S rRNA gene clone libraries. Two hundred twenty-eight sequences for QH and 182 sequences for YPL were analyzed by amplified ribosomal DNA-restriction analysis. Libraries revealed 44 bacterial and 57 archaeal different operational taxonomic units belonging to at least 8 bacterial and 3 archaeal divisions, but not all divisions were observed in both salt mines. The bacterial community affiliated with the Bacteroidetes was the most abundant (60% of clones) in QH, while the community in YPL was dominated by δ-Proteobacteria (45% of clones). All archaeal clones from QH were affiliated with Halobacteriaceae. In contrast, in the YPL library, 49% of clones belonged to Halobacteriaceae, 31% of clones related to unclassified archaea, and 21% of clones belonged to Crenarchaeota. Bioinformatic analysis and comparisons showed that the clone libraries were significantly different between two salt mines.

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Novel and Unexpected Prokaryotic Diversity in Water and Sediments of the Alkaline, Hypersaline Lakes of the Wadi An Natrun, Egypt

Cited by 28 publications

References 0 publications

Seasonal changes in bacterial diversity in the Salton Sea

Seasonal changes in bacterial diversity in the Salton Sea

A snapshot of microbial communities from the Kutch: one of the largest salt deserts in the World

Comparative molecular analysis of the prokaryotic diversity of two salt mine soils in southwest China

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