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Landfill Intermediate Cover Soils

ABSTRACT: Landfill Intermediate Cover Soils Metagenome

PROVIDER: PRJNA1049192 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR27109728_1.fastq.gz	Fastqsanger.gz
	SRR27109729_1.fastq.gz	Fastqsanger.gz
	SRR27109730_1.fastq.gz	Fastqsanger.gz
	SRR27109731_1.fastq.gz	Fastqsanger.gz
	SRR27109732_1.fastq.gz	Fastqsanger.gz

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Metagenomic analysis revealed higher microbial and functional gene diversities in deep landfill

Project description:Waste decomposition in landfills is a complex and microbe-mediated process. Understanding the microbial community composition and structure is critical for accelerating decomposition and reducing adverse impact on the environment. Here, we examined the microbial communities along with landfill depth and age (LDA) in a sanitary landfill in Beijing, China using 16s rRNA Illumina sequencing and GeoChip 4.6. We found that Clostridiales and Methanofollis were the predominant bacteria and archaea in the present landfill, respectively. Interestingly, in contrast with the decreasing trend of microbial diversity in soil, both phylogenetic and functional diversities were higher in deeper and older refuse in the landfill. Phylogenetic compositions were obviously different in the refuse with the same LDA and such difference is mainly attributed to the heterogeneity of refuse instead of random process. Nevertheless, functional structures were similar within the same LDA, indicating that microbial community assembly in the landfill may be better reflected by functional genes rather than phylogenetic identity. Mantel test and canonical correspondence analysis suggested that environmental variables had significant impacts on both phylogenetic composition and functional structure. Higher stress genes, genes for degrading toxic substances and endemic genes in deeper and older refuse indicated that they were needed for the microorganisms to survive in the more severe environments. This study suggests that landfills are a repository of stress-resistant and contaminant-degrading microorganisms, which can be used for accelerating landfill stabilization and enhancing in situ degradation.

2016-06-15 | GSE68712 | GEO