Poorly known microbial taxa dominate the microbiome of hypersaline Sambhar Lake salterns in India

Pal, Srikanta; Biswas, Raju; Misra, A. P.; Sar, Abhijit; Banerjee, Sohini; Mukherjee, Partha; Dam, Bomba

doi:10.1007/s00792-020-01201-0

Cited by 16 publications

(15 citation statements)

References 48 publications

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“…3). This phyla composition was comparable to that of coastal microbial mats where Cyanobacteria, Proteobacteria and Bacteroidetes are dominant (Cardoso et al 2019) as well as in most hypersaline microbial mats (Pal et al 2020). Bacteroidetes and Proteobacteria, described as dominant phyla in the water and sediment of other salterns (Boujelben et al 2012;Lee et al 2020), are known to play important roles in carbon and nitrogen cycles (Bernhard, Marshall and Yiannos 2012;Wong et al 2015).…”

Section: Bacterial and Meiofaunal Community Composition Of Microbial Mats Inhabiting Abandoned And Exploited Salternssupporting

confidence: 59%

New insights in bacterial and eukaryotic diversity of microbial mats inhabiting exploited and abandoned salterns at the Ré Island (France)

Mazière

Agogué

Cravo‐Laureau

et al. 2021

Microbiological Research

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In order to understand the effect of human practices on microbial mats organisation, the study aimed to investigate the biodiversity within microbial mats from exploited and abandoned salterns. Despite several attempts, archaeal 16S rRNA gene fragment sequences were not obtained, indicating that microbial mats were probably dominated by Bacteria with very low abundance of Archaea (< 1%).Thus, the study compared the bacterial and meiofaunal diversity of microbial mats from abandoned and exploited salterns. The higher salinity (101 ± 3.7 psu vs. 51.1 ± 0.7 psu; Welch t-test p<0.05) of the exploited site maintained lower bacterial diversity in comparison to the abandoned site where the salinity gradient was no longer maintained. However, the microbial mats exhibited similar bacterial class composition while the eukaryotic diversity was significantly higher in the exploited saltern. The abandoned saltern was dominated by sulfate-reducing bacteria and Nematoda, while the exploited saltern was characterized by the presence of halophilic bacteria belonging to Marinobacter, Salinivibrio and Rhodohalobacter genera, and the larger abundance of Hypotrichia (ciliates). Such bacterial and eukaryotic diversity difference might be explained by human actions for salt recovery in exploited salterns such as scraping the surface of microbial mat and increasing salinity renewing the microbial mat each year. Such action decreases the bacterial diversity changing the food web structure that favour the presence of a larger diversity of eukaryotic organisms. Our study provides new insights on microbial mat communities inhabiting salterns, especially the consequences of abandoning saltern exploitation.

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Section: Bacterial and Meiofaunal Community Composition Of Microbial Mats Inhabiting Abandoned And Exploited Salternssupporting

confidence: 59%

New insights in bacterial and eukaryotic diversity of microbial mats inhabiting exploited and abandoned salterns at the Ré Island (France)

Mazière

Agogué

Cravo‐Laureau

et al. 2021

Microbiological Research

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“…Metagenomic studies, focused on the diversity and metabolic capabilities of reconstructed metagenome-assembled genome (MAGs) from environmental samples, have expanded our knowledge about microbial diversity of natural ecosystems, including hypersaline environments 6 , 7 . However, these studies overlook the within-species diversity of microbial inhabitants of these environments.…”

Section: Introductionmentioning

confidence: 99%

Hypersaline Lake Urmia: a potential hotspot for microbial genomic variation

Kheiri

Mehrshad

Pourbabaee

et al. 2023

Sci Rep

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Lake Urmia located in Iran is a hypersaline environment with a salinity of about 27% (w/v). Metagenomic analyses of water samples collected from six locations in the lake exhibited a microbial community dominated by representatives of the family Haloferacaceae (69.8%), mainly those affiliated to only two genera, Haloquadratum (59.3%) and Halonotius (9.1%). Similar to other hypersaline lakes, the bacterial community was dominated by Salinibacter ruber (23.3%). Genomic variation analysis by inspecting single nucleotide variations (SNVs) and insertions/deletions (INDELs) exhibited a high level of SNVs and insertions, most likely through transformation for abundant taxa in the Lake Urmia community. We suggest that the extreme conditions of Lake Urmia and specifically its high ionic concentrations could potentially increase the SNVs and insertions, which can consequently hamper the assembly and genome reconstruction from metagenomic reads of Lake Urmia.

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“…A single OTU of this group dominated Lake Alchichica samples in winter (Supplementary Table S3 ). Although often associated with anoxic environments (Liu et al 2018 ), the presence of Woesearchaeales has been consistently observed in inland (hyper)saline bodies (Han et al 2017 ; Menéndez‐Serra et al 2020 ; Pal et al 2020 ) but also in very low salinity oligotrophic high altitude (Ortiz‐Alvarez and Casamayor 2016 ) and boreal lakes (Juottonen et al 2020 ). This attests to the wide ecological range of habitats colonized by members of these archaea and/or their hosts since, being members of the DPANN, they likely are obligatory symbionts (Castelle et al 2018 ; Dombrowski et al 2019 ).…”

Section: Resultsmentioning

confidence: 99%

Planktonic microbial communities from microbialite‐bearing lakes sampled along a salinity‐alkalinity gradient

Iniesto

Moreira

Benzerara³

et al. 2022

Limnology & Oceanography

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Continental freshwater systems are particularly vulnerable to environmental variation. Climate changeinduced desertification and the anthropogenic exploitation of hydric resources result in the progressive evaporation and salinization of inland water bodies in many areas of the globe. However, how this process impacts microbial communities and their activities in biogeochemical cycles is poorly known. Here, we take a space-fortime substitution approach and characterize the prokaryotic and eukaryotic microbial communities of two planktonic cell-size fractions (0.2-5 μm and 5-30 μm) from lakes of diverse trophic levels sampled along a salinity-alkalinity gradient located in the Trans-Mexican Volcanic Belt (TMVB). We applied a 16S/18S rRNA gene metabarcoding strategy to determine the microbial community composition of 54 samples from 12 different lakes, from the low-salinity lake Zirahuén to the hypersaline residual ponds of Rinc on de Parangueo. Except for systems at both extremes of the salinity gradient, most lakes along the evaporation trend bear actively forming microbialites, which harbor microbial communities clearly distinct from those of plankton. Several lakes were sampled in winter and late spring and the crater lakes Alchichica and Atexcac were sampled across the water column. Physicochemical parameters related to salinity-alkalinity were the most influential drivers of microbial community structure whereas trophic status, depth, or season were less important. Our results suggest that climate change and anthropogenic-induced hydric deficit could significantly affect microbial communities, potentially altering ecosystem functioning.

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Poorly known microbial taxa dominate the microbiome of hypersaline Sambhar Lake salterns in India

Cited by 16 publications

References 48 publications

New insights in bacterial and eukaryotic diversity of microbial mats inhabiting exploited and abandoned salterns at the Ré Island (France)

New insights in bacterial and eukaryotic diversity of microbial mats inhabiting exploited and abandoned salterns at the Ré Island (France)

Hypersaline Lake Urmia: a potential hotspot for microbial genomic variation

Planktonic microbial communities from microbialite‐bearing lakes sampled along a salinity‐alkalinity gradient

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