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Soil metagenome

ABSTRACT: Bacterial 16S rRNA genes from heavy-metal contaminted soils Targeted Locus (Loci)

PROVIDER: PRJNA178496 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR609660.fastq.gz	Fastqsanger.gz
	SRR609661.fastq.gz	Fastqsanger.gz
	SRR609662.fastq.gz	Fastqsanger.gz
	SRR609663.fastq.gz	Fastqsanger.gz
	SRR609901.fastq.gz	Fastqsanger.gz

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Project description:Despite the global importance of forests, it is virtually unknown how their soil microbial communities adapt at the phylogenetic and functional level to long term metal pollution. Studying twelve sites located along two distinct gradients of metal pollution in Southern Poland revealed that both community composition (via MiSeq Illumina sequencing of 16S rRNA genes) and functional gene potential (using GeoChip 4.2) were highly similar across the gradients despite drastically diverging metal contamination levels. Metal pollution level significantly impacted microbial community structure (p = 0.037), but not bacterial taxon richness. Metal pollution altered the relative abundance of specific bacterial taxa, including Acidobacteria, Actinobacteria, Bacteroidetes, Chloroflexi, Firmicutes, Planctomycetes and Proteobacteria. Also, a group of metal resistance genes showed significant correlations with metal concentrations in soil, although no clear impact of metal pollution levels on overall functional diversity and structure of microbial communities was observed. While screens of phylogenetic marker genes, such as 16S rRNA, provided only limited insight into resilience mechanisms, analysis of specific functional genes, e.g. involved in metal resistance, appeared to be a more promising strategy. This study showed that the effect of metal pollution on soil microbial communities was not straightforward, but could be filtered out from natural variation and habitat factors by multivariate statistical analysis and spatial sampling involving separate pollution gradients.

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