Bog bacterial community: data from north-western Russia

Area of Science:

• Ecology
• Microbiology
• Biogeochemistry

Background:

• Boreal bogs are significant global carbon sinks, storing substantial soil carbon.
• Decomposition in wetlands is key to the carbon cycle, but climate change threatens this balance.
• Microbial communities regulate decomposition and gas exchange in peat deposits but remain understudied.

Purpose of the Study:

• To investigate the prokaryote communities in peat deposits of southern White Sea coastal ombrotrophic bogs.
• To understand the taxonomic composition and diversity of archaea and bacteria in these vital ecosystems.

Main Methods:

• High-throughput sequencing of the V4 region of the 16S rRNA gene using Illumina technology.
• Sampling of peat deposits from depths of 0-310 cm.
• Analysis of taxonomic composition and biodiversity metrics (Shannon, ChaO1).

Main Results:

• Identified 105 species across 19 phyla, with dominant phyla including Pseudomonadota, Acidobacteriota, and Verrucomicrobiota.
• Desulfobacterota was identified as a non-specific phylum.
• Detected various methanogenic, methylotrophic, and nitrogen-fixing microorganisms.
• Observed a decrease in Shannon biodiversity and ChaO1 index with increasing depth.

Conclusions:

• The study provides a comprehensive taxonomic profile of prokaryotes in White Sea coastal ombrotrophic bogs.
• Findings contribute to understanding microbial regulation of carbon cycling in boreal peatlands.
• The identified microbial groups play roles in crucial biogeochemical processes within these carbon sinks.