Metagenome of a microbial community inhabiting a metal-rich tropical stream sediment.
作者： Patrícia S Costa , Mariana P Reis , Marcelo P Ávila , Laura R Leite , Flávio MG De Araújo
DOI: 10.1371/JOURNAL.PONE.0119465
关键词: Dominance (ecology) 、 Metagenomics 、 Nitrosopumilus 、 Ecology 、 Microbial Taxonomy 、 Microbial population biology 、 Environmental DNA 、 Biology 、 Sediment 、 Proteobacteria
摘要: Here, we describe the metagenome and functional composition of a microbial community in historically metal-contaminated tropical freshwater stream sediment. The sediment was collected from Mina Stream located Iron Quadrangle (Brazil), one world's largest mining regions. Environmental DNA extracted sequenced using SOLiD technology, total 7.9 Gbp produced. A taxonomic profile that obtained by comparison to Greengenes database revealed complex with dominance Proteobacteria Parvarcheota. Contigs were recruited bacterial archaeal genomes, especially Candidatus Nitrospira defluvii Nitrosopumilus maritimus, their presence implicated them process N cycling (MSS). Functional reconstruction large, diverse set genes for ammonium assimilation ammonification. These processes have been maintenance cycle health SEED subsystems annotation unveiled high degree diversity metal resistance genes, suggesting prokaryotic is adapted contamination. Furthermore, metabolic detected MSS, historical arsenic contamination no longer affecting community. results expand current knowledge sediments.
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