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    Metagenomic analysis of microbial communities across a transect from low to highly hydrocarbon-contaminated soils in King George Island, Maritime Antarctica

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    Type
    Article
    Authors
    Jurelevicius, Diogo cc
    Pereira, Raphael da Silva cc
    Mota, Fabio Faria
    Cury, Juliano C.
    Oliveira, Ivan Cardoso
    Rosado, Alexandre S. cc
    Mason, Olivia U.
    Jansson, Janet K.
    Seldin, Lucy
    KAUST Department
    Biological and Environmental Science and Engineering (BESE) Division
    Date
    2021-09-20
    Online Publication Date
    2021-09-20
    Print Publication Date
    2022-01
    Embargo End Date
    2022-09-20
    Permanent link to this record
    http://hdl.handle.net/10754/671956
    
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    Abstract
    Soil samples from a transect from low to highly hydrocarbon-contaminated soils were collected around the Brazilian Antarctic Station Comandante Ferraz (EACF), located at King George Island, Antarctica. Quantitative PCR (qPCR) analysis of bacterial 16S rRNA genes, 16S rRNA gene (iTag), and shotgun metagenomic sequencing were used to characterize microbial community structure and the potential for petroleum degradation by indigenous microbes. Hydrocarbon contamination did not affect bacterial abundance in EACF soils (bacterial 16S rRNA gene qPCR). However, analysis of 16S rRNA gene sequences revealed a successive change in the microbial community along the pollution gradient. Microbial richness and diversity decreased with the increase of hydrocarbon concentration in EACF soils. The abundance of Cytophaga, Methyloversatilis, Polaromonas, and Williamsia was positively correlated (p-value = <.05) with the concentration of total petroleum hydrocarbons (TPH) and/or polycyclic aromatic hydrocarbons (PAH). Annotation of metagenomic data revealed that the most abundant hydrocarbon degradation pathway in EACF soils was related to alkyl derivative-PAH degradation (mainly methylnaphthalenes) via the CYP450 enzyme family. The abundance of genes related to nitrogen fixation increased in EACF soils as the concentration of hydrocarbons increased. The results obtained here are valuable for the future of bioremediation of petroleum hydrocarbon-contaminated soils in polar environments.
    Citation
    Jurelevicius, D., Pereira, R. da S., Mota, F. F., Cury, J. C., Oliveira, I. C., Rosado, A. S., … Seldin, L. (2021). Metagenomic analysis of microbial communities across a transect from low to highly hydrocarbon-contaminated soils in King George Island, Maritime Antarctica. Geobiology. doi:10.1111/gbi.12472
    Sponsors
    This study was supported by grants from Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq), Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES, financial code 001), and Fundação de Amparo à Pesquisa do Estado do Rio de Janeiro (FAPERJ). The authors gratefully acknowledge the Earth Microbiome Program (EMP) for the sequencing data presented in this study.
    Publisher
    Wiley
    Journal
    Geobiology
    DOI
    10.1111/gbi.12472
    PubMed ID
    34545693
    Additional Links
    https://onlinelibrary.wiley.com/doi/10.1111/gbi.12472
    ae974a485f413a2113503eed53cd6c53
    10.1111/gbi.12472
    Scopus Count
    Collections
    Articles; Biological and Environmental Science and Engineering (BESE) Division

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