ArticleScientific reports2022
Salt flat microbial diversity and dynamics across salinity gradient.
Article in Scientific reports, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 12 papers.
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12 citing papers in PubMed, 20 citations in OpenAlex.
- Metagenomic insights into the taxonomic and metabolic diversity of the microbiome of Lake Karum in the Danakil Depression, Ethiopia.Environmental microbiome · 2026Article
- Extreme Arabian environments and their microbiomes: new frontiers for astrobiology and biosignature discovery.Extremophiles : life under extreme conditions · 2026Review
- Characterizing carbonate mineral-forming bacterial strains and their carbonic anhydrase activities in two coastal sabkhas.Biochemistry and biophysics reports · 2025Article
- Comparing Protein Stability in Modern and Ancient Sabkha Environments: Implications for Molecular Remnants on Ancient Mars.International journal of molecular sciences · 2025Article
- Salinity Effect on Soil Bacterial and Archaeal Diversity and Assembly inMicroorganisms · 2025Article
- Diversification, niche adaptation, and evolution of a candidate phylum thriving in the deep Critical Zone.Proceedings of the National Academy of Sciences of the United States of America · 2025Article
- Functional stratification and enzymatic arrangement in microbial communities across a hypersaline depth gradient.Frontiers in microbiology · 2025Article
- Microbial diversity of coastal microbial mats formations in karstic habitats from the Yucatan Peninsula, Mexico.PloS one · 2025Article
- High-quality genome assembly and annotation of five bacteria isolated from the Abu Dhabi sabkha-shore region.BMC genomic data · 2024Article
- Article
- Study of diversity of mineral-forming bacteria in sabkha mats and sediments of mangrove forest in Qatar.Biotechnology reports (Amsterdam, Netherlands) · 2023Article
- Variability of blue carbon storage in arid evaporitic environment of two coastal Sabkhas or mudflats.Scientific reports · 2023Article
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Authors and funding
16 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Sabkhas are hypersaline, mineral-rich, supratidal mudflats that harbor microbes that are adapted to high salt concentration. Sabkha microbial diversity is generally studied for their community composition, but less is known about their genetic structure and heterogeneity. In this study, we analyzed a coastal sabkha for its microbial composition using 16S rDNA and whole metagenome, as well as for its population genetic structure. Our 16S rDNA analysis show high alpha diversity in both inner and edge sabkha than outer sabkha. Beta diversity result showed similar kind of microbial composition between inner and edge sabkha, while outer sabkha samples show different microbial composition. At phylum level, Bacteroidetes (~ 22 to 34%), Euryarchaeota (~ 18 to ~ 30%), unclassified bacteria (~ 24 to ~ 35%), Actinobacteria (~ 0.01 to ~ 11%) and Cyanobacteria (less than 1%) are predominantly found in both inside and edge sabkha regions, whereas Proteobacteria (~ 92 to ~ 97%) and Parcubacteria (~ 1 to ~ 2%) are predominately found in outer sabkha. Our 225 metagenomes assembly from this study showed similar bacterial community profile as observed in 16S rDNA-based analysis. From the assembled genomes, we found important genes that are involved in biogeochemical cycles and secondary metabolite biosynthesis. We observed a dynamic, thriving ecosystem that engages in metabolic activity that shapes biogeochemical structure via carbon fixation, nitrogen, and sulfur cycling. Our results show varying degrees of horizontal gene transfers (HGT) and homologous recombination, which correlates with the observed high diversity for these populations. Moreover, our pairwise population differentiation (Fst) for the abundance of species across the salinity gradient of sabkhas identified genes with strong allelic differentiation, lower diversity and elevated nonsynonymous to synonymous ratio of variants, which suggest selective sweeps for those gene variants. We conclude that the process of HGT, combined with recombination and gene specific selection, constitute the driver of genetic variation in bacterial population along a salinity gradient in the unique sabkha ecosystem.
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