Vertical distribution of bacterial communities in high arsenic sediments of Hetao Plain, Inner Mongolia

Wang, Yanhong; Li, Ping; Jiang, Dawei; Li, Bing; Dai, Xinyue; Jiang, Zhou; Wang, Yanxin

doi:10.1007/s10646-014-1322-7

Cited by 9 publications

(6 citation statements)

References 45 publications

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“…Planctomycetes is an important constituent of As- and Pb-rich habitats (45), and is among the most active bacterial taxa in As-contaminated ecosystems (24). Moreover, an important Polaromonas and Flavobacterium -like population was detected in sample S12 (RL), which was recently found among the major microbiota in As-rich habitats (42, 58). …”

Section: Resultsmentioning

confidence: 71%

Bacterial Community Structures in Freshwater Polar Environments of Svalbard

Ntougias

Polkowska

Nikolaki

et al. 2016

Microbes and environments

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Two thirds of Svalbard archipelago islands in the High Arctic are permanently covered with glacial ice and snow. Polar bacterial communities in the southern part of Svalbard were characterized using an amplicon sequencing approach. A total of 52,928 pyrosequencing reads were analyzed in order to reveal bacterial community structures in stream and lake surface water samples from the Fuglebekken and Revvatnet basins of southern Svalbard. Depending on the samples examined, bacterial communities at a higher taxonomic level mainly consisted either of Bacteroidetes, Betaproteobacteria, and Microgenomates (OP11) or Planctomycetes, Betaproteobacteria, and Bacteroidetes members, whereas a population of Microgenomates was prominent in 2 samples. At the lower taxonomic level, bacterial communities mostly comprised Microgenomates, Comamonadaceae, Flavobacteriaceae, Legionellales, SM2F11, Parcubacteria (OD1), and TM7 members at different proportions in each sample. The abundance of OTUs shared in common among samples was greater than 70%, with the exception of samples in which the proliferation of Planctomycetaceae, Phycisphaeraceae, and Candidatus Methylacidiphilum spp. lowered their relative abundance. A multi-variable analysis indicated that As, Pb, and Sb were the main environmental factors influencing bacterial profiles. We concluded that the bacterial communities in the polar aquatic ecosystems examined mainly consisted of freshwater and marine microorganisms involved in detritus mineralization, with a high proportion of zooplankton-associated taxa also being identified.

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Section: Resultsmentioning

confidence: 71%

Bacterial Community Structures in Freshwater Polar Environments of Svalbard

Ntougias

Polkowska

Nikolaki

et al. 2016

Microbes and environments

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“…Algoriphagus, Rhodobacter and Limnobacter are the most abundant genera in the TDE sample. Algoriphagus identified in shallow aquifers [36] and sediments [37] with high arsenic levels using metagenomic methods can reduce As 5+ to As 3+ using nitrate, acetate, sulfide and Fe(II) as electron donors.…”

Section: Discussionmentioning

confidence: 99%

A metagenomic approach to the molecular analysis of bacterial communities in tailings of a gold mine

Parsania

Mohammadi

Soudi

et al. 2022

Preprint

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Gold mine operations release arsenic pollutants in environment. The present study investigated the diversity of bacterial communities in the arsenic-contaminated tailings dam effluent (TDE) of Zarshuran gold mine, Takab, northwest of Iran. The bacterial communities were examined using the next-generation sequencing method (Illumina) targeting the V3-V4 region of 16S rRNA genes. Bacteroidetes (50.3%), Proteobacteria (45.49%), Actinobacteria (1.14%) and Firmicutes (1.08%) constituted dominant phyla in the TDE. Its diversity was analyzed, and compared with that of three previously-studied arsenic-contaminated groundwater (GW) microbiomes. The raw sequencing data were analyzed in QIIME2. The prevalent taxonomic groups observed in all of the samples belonged to Proteobacteria (8.06-45.49%), Bacteroidetes (1.85-50.32%), Firmicutes (1.00-6.2%), Actinobacteria (0.86-5.09%), Planctomycetes (0.05-9.37%) and Cyanobacteria (0.6-2.71%). According to Principal Coordinates Analysis (PCoA), the TDE and GW samples were divided into high and low groups, based on their arsenic content, respectively. The average numbers of observed alpha diversity indices, i.e. Pielou’s evenness and Faith’s phylogenetic diversity, were not significantly different (P=0.18, Kruskal-Wallis test). According to the beta diversity analysis (unweighted), the observed operational taxonomic units (OTUs) and the diversity of the bacterial populations were not significantly different in the TDE, compared to the GW samples (PERMANOVA, P=0.276, 999 Permutations).

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“…The western Hetao basin, a typical basin hosting high As groundwater (up to 1000 μg/L) with high sulfate concentrations (up to 1200 mg/L), ,, was selected as a study area, where high As groundwater frequently occurs in the flat plain and is considered a result of the interplay between As-, Fe-, N-, and S-biogeochemical cycles. ,,,− Therefore, the objectives of this study are (i) to characterize the bulk and active microbial community structures in sediments and groundwater at different depths; (ii) to determine the relationship between the hydrogeochemical conditions and the bulk and active microbial communities in both sediments and groundwater; and (iii) to identify key active As–Fe–S–N biogeochemical processes (and related microbes) with the potential to control As behavior in the aquifers .…”

Section: Introductionmentioning

confidence: 99%

Understanding Microbial Arsenic-Mobilization in Multiple Aquifers: Insight from DNA and RNA Analyses

Xiu

Lloyd

et al. 2021

Environ. Sci. Technol.

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Biogeochemical processes critically control the groundwater arsenic (As) enrichment; however, the key active As-mobilizing biogeochemical processes and associated microbes in high dissolved As and sulfate aquifers are poorly understood. To address this issue, the groundwater-sediment geochemistry, total and active microbial communities, and their potential functions in the groundwater-sediment microbiota from the western Hetao basin were determined using 16S rRNA gene (rDNA) and associated 16S rRNA (rRNA) sequencing. The relative abundances of either sediment or groundwater total and active microbial communities were positively correlated. Interestingly, groundwater active microbial communities were mainly associated with ammonium and sulfide, while sediment active communities were highly related to water-extractable nitrate. Both sediment-sourced and groundwater-sourced active microorganisms (rRNA/rDNA ratios > 1) noted Fe(III)-reducers (induced by ammonium oxidation) and As(V)-reducers, emphasizing the As mobilization via Fe(III) and/or As(V) reduction. Moreover, active cryptic sulfur cycling between groundwater and sediments was implicated in affecting As mobilization. Sediment-sourced active microorganisms were potentially involved in anaerobic pyrite oxidation (driven by denitrification), while groundwater-sourced organisms were associated with sulfur disproportionation and sulfate reduction. This study provides an extended whole-picture concept model of active As−N−S−Fe biogeochemical processes affecting As mobilization in high dissolved As and sulfate aquifers.

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Vertical distribution of bacterial communities in high arsenic sediments of Hetao Plain, Inner Mongolia

Cited by 9 publications

References 45 publications

Bacterial Community Structures in Freshwater Polar Environments of Svalbard

Bacterial Community Structures in Freshwater Polar Environments of Svalbard

A metagenomic approach to the molecular analysis of bacterial communities in tailings of a gold mine

Understanding Microbial Arsenic-Mobilization in Multiple Aquifers: Insight from DNA and RNA Analyses

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