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Arctic and alpine top soils

ABSTRACT: Arctic and alpine permafrost Raw sequence reads

PROVIDER: PRJNA535397 | ENA |

REPOSITORIES: ENA

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Dataset's files

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			Action	DRS
	SRR8984180_1.fastq.gz	Fastqsanger.gz
	SRR8984180_2.fastq.gz	Fastqsanger.gz
	SRR8984190_1.fastq.gz	Fastqsanger.gz
	SRR8984190_2.fastq.gz	Fastqsanger.gz
	SRR8984200_1.fastq.gz	Fastqsanger.gz

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Project description:The melting of permafrost and its potential impact on greenhouse gas emissions is a major concern in the context of global warming. The fate of the carbon trapped in permafrost will largely depend on soil physico-chemical characteristics, among which are the quality and quantity of organic matter, pH and water content, and on microbial community composition. In this study, we used microarrays and real-time PCR (qPCR) targeting 16S rRNA genes to characterize the bacterial communities in three different soil types representative of various Arctic settings. The microbiological data were linked to soil physico-chemical characteristics and CO2 production rates. Microarray results indicated that soil characteristics, and especially the soil pH, were important parameters in structuring the bacterial communities at the genera/species levels. Shifts in community structure were also visible at the phyla/class levels, with the soil CO2 production rate being positively correlated to the relative abundance of the Alphaproteobacteria, Bacteroidetes, and Betaproteobacteria. These results indicate that CO2 production in Arctic soils does not only depend on the environmental conditions, but also on the presence of specific groups of bacteria that have the capacity to actively degrade soil carbon. Three different soil types from the Canadian high Arctic were sampled at two depths within the active layer of soil and at two sampling dates (winter and summer conditions), for a total of 20 samples.

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