Proposal of Giesbergeria voronezhensis gen. nov., sp. nov. and G. kuznetsovii sp. nov. and reclassification of [Aquaspirillum] anulus, [A.] sinuosum and [A.] giesbergeri as Giesbergeria anulus comb. nov., G. sinuosa comb. nov. and G. giesbergeri comb. nov., and [Aquaspirillum] metamorphum and [A.] psychrophilum as Simplicispira metamorpha gen. nov., comb. nov. and S. psychrophila comb. nov.

Grabovich, M. Yu.; Gavrish, Ekaterina; Kuever, Jan; Lysenko, Anatoly M.; Podkopaeva, D. A.; Дубинина, Г. А.

doi:10.1099/ijs.0.64027-0

Cited by 79 publications

(23 citation statements)

References 29 publications

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“…OTUs 6, 7, and 10 from the phylum Proteobacteria were also slightly more abundant in successful cultivation than the unsuccessful. In particular, OTU 7 (5% in successful and <1% in unsuccessful) most closely matched the genus Simplicipsira, which includes microorganisms commonly found in wastewater and are capable of phosphorus removal ( Simplicispira limi) and denitrification ( Simplicispira psychrophilia) (Grabovich et al 2006; Lu et al 2007) The success of cultivation did not preclude phototrophic growth. The 5 OTUs dominant in the final communities all clustered with cyanobacterial populations.…”

Section: Resultsmentioning

confidence: 94%

The role of inorganic nitrogen in successful formation of granular biofilms for wastewater treatment that support cyanobacteria and bacteria

et al. 2017

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Recently, the use of phototrophs for wastewater treatment has been revisited because of new approaches to separate them from effluent streams. One manifestation uses oxygenic photogranules (OPGs) which are dense, easily-settleable granular biofilms of cyanobacteria, which surrounding populations of heterotrophs, autotrophs, and microalgae. OPGs can remove COD and nitrogenous compounds without external aeration. To better grow and maintain biomass in the proposed wastewater process, this study seeks to understand the factors that contribute to successful granulation. Availability of initial inorganic nitrogen, particularly ammonium, was associated with successful cultivation of OPGs. In the first days of granulation, a decrease in ammonium coupled with an increase in a cyanobacterial-specific 16S rRNA gene, may suggest that ammonium was assimilated in cyanobacteria offering a competitive environment for growth. Though both successful and unsuccessful OPG formation demonstrated a shift from non-phototrophic bacterial dominated communities on day 0 to cyanobacterial dominated communities on day 42, the successful community had a greater relative abundance (46%) of OTUs associated with genera Oscillatoria and Geitlernema than the unsuccessful community (27%), supporting that filamentous cyanobacteria are essential for successful OPG formation. A greater concentration of chlorophyll b in the unsuccessful OPG formation suggested a greater abundance of algal species. This study offers indicators of granulation success, notably availability of inorganic nitrogen and chlorophyll a and b concentrations for monitoring the health and growth of biomass for a potential OPG process.Electronic supplementary materialThe online version of this article (doi:10.1186/s13568-017-0444-8) contains supplementary material, which is available to authorized users.

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Section: Resultsmentioning

confidence: 94%

The role of inorganic nitrogen in successful formation of granular biofilms for wastewater treatment that support cyanobacteria and bacteria

et al. 2017

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“…Two pathogenic families of this order, Burkholderiaceae and Alcaligenaceae, were found to be significantly correlated with the prevalence of bla (for both families) and qnr (Burkholderiaceae)3233. The family Comamonadaceae is significantly correlated with bla, qnr and efflux pump-coding genes, in which five environmental genera were found to be correlated with antimicrobial resistance genes: Comamonas (correlation with bla, qnr and efflux pump-coding genes)34, Limnohabitans (correlation with bla, qnr and efflux pump-coding genes)35, Aquabacterium (correlation with efflux pump-coding genes)36, Simplicispira (correlation with bla )37, and Hydrogenophaga (correlation with qnr and bla )38.…”

Section: Resultsmentioning

confidence: 99%

Bacterial plasmid-mediated quinolone resistance genes in aquatic environments in China

Yan

Liú

Wang

et al. 2017

Sci Rep

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Emerging antimicrobial resistance is a major threat to human’s health in the 21st century. Understanding and combating this issue requires a full and unbiased assessment of the current status on the prevalence of antimicrobial resistance genes and their correlation with each other and bacterial groups. In aquatic environments that are known reservoirs for antimicrobial resistance genes, we were able to reach this goal on plasmid-mediated quinolone resistance (PMQR) genes that lead to resistance to quinolones and possibly also to the co-emergence of resistance to β-lactams. Novel findings were made that qepA and aac-(6′)-Ib genes that were previously regarded as similarly abundant with qnr genes are now dominant among PMQR genes in aquatic environments. Further statistical analysis suggested that the correlation between PMQR and β-lactam resistance genes in the environment is still weak, that the correlations between antimicrobial resistance genes could be weakened by sufficient wastewater treatment, and that the prevalence of PMQR has been implicated in environmental, pathogenic, predatory, anaerobic, and more importantly, human symbiotic bacteria. This work provides a comprehensive analysis of PMQR genes in aquatic environments in Jinan, China, and provides information with which combat with the antimicrobial resistance problem may be fought.

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“…Denitrifying Betaproteobacteria also appear to be present, as OTUs with 99–100% identity to Comamonas spp. and Simplicispira psychrophila were identified; bacteria that are known to perform chemoorganotrophic growth515253. OTUs matching the ubiquitous and cosmopolitan heterotrophic freshwater bacterium, P. necessarius subsp.…”

Section: Discussionmentioning

confidence: 99%

Microbial communities of aquatic environments on Heard Island characterized by pyrotag sequencing and environmental data

Allen

Cavicchioli

2017

Sci Rep

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Heard Island in the Southern Ocean is a biological hotspot that is suffering the effects of climate change. Significant glacier retreat has generated proglacial lagoons, some of which are open to the ocean. We used pyrotag sequencing of SSU rRNA genes and environmental data to characterize microorganisms from two pools adjacent to animal breeding areas, two glacial lagoons and Atlas Cove (marine site). The more abundant taxa included Actinobacteria, Bacteroidetes and Proteobacteria, ciliates and picoflagellates (e.g. Micromonas), and relatively few Archaea. Seal Pool, which is rich in organic matter, was characterized by a heterotrophic degradative community, while the less eutrophic Atlas Pool had more eucaryotic primary producers. Brown Lagoon, with the lowest nutrient levels, had Eucarya and Bacteria predicted to be oligotrophs, possess small cell sizes, and have the ability to metabolize organic matter. The marine influence on Winston Lagoon was evident by its salinity and the abundance of marine-like Gammaproteobacteria, while also lacking typical marine eucaryotes indicating the system was still functioning as a distinct niche. This is the first microbiology study of Heard Island and revealed that communities are distinct at each location and heavily influenced by local environmental factors.

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Cited by 79 publications

References 29 publications

The role of inorganic nitrogen in successful formation of granular biofilms for wastewater treatment that support cyanobacteria and bacteria

The role of inorganic nitrogen in successful formation of granular biofilms for wastewater treatment that support cyanobacteria and bacteria

Bacterial plasmid-mediated quinolone resistance genes in aquatic environments in China

Microbial communities of aquatic environments on Heard Island characterized by pyrotag sequencing and environmental data

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