Archaeal and bacterial communities across a chronosequence of drained lake basins in arctic Alaska

Kao-Kniffin, J., Woodcroft, B.J., Carver, S.M., Bockheim J.G., Handelsman, J., Tyson, G.W., Hinkel, K.M. and Mueller, C.W. (2015) Archaeal and bacterial communities across a chronosequence of drained lake basins in arctic Alaska. Scientific Reports, 5 . doi:10.1038/srep18165


Author Kao-Kniffin, J.
Woodcroft, B.J.
Carver, S.M.
Bockheim J.G.
Handelsman, J.
Tyson, G.W.
Hinkel, K.M.
Mueller, C.W.
Title Archaeal and bacterial communities across a chronosequence of drained lake basins in arctic Alaska
Journal name Scientific Reports   Check publisher's open access policy
ISSN 2045-2322
Publication date 2015-12-18
Year available 2015
Sub-type Article (original research)
DOI 10.1038/srep18165
Open Access Status DOI
Volume 5
Total pages 12
Place of publication London, United Kingdom
Publisher Nature Publishing Group
Collection year 2016
Language eng
Formatted abstract
We examined patterns in soil microbial community composition across a successional gradient of drained lake basins in the Arctic Coastal Plain. Analysis of 16S rRNA gene sequences revealed that methanogens closely related to Candidatus ‘Methanoflorens stordalenmirensis’ were the dominant archaea, comprising >50% of the total archaea at most sites, with particularly high levels in the oldest basins and in the top 57 cm of soil (active and transition layers). Bacterial community composition was more diverse, with lineages from OP11, Actinobacteria, Bacteroidetes, and Proteobacteria found in high relative abundance across all sites. Notably, microbial composition appeared to converge in the active layer, but transition and permafrost layer communities across the sites were significantly different to one another. Microbial biomass using fatty acid-based analysis indicated that the youngest basins had increased abundances of gram-positive bacteria and saprotrophic fungi at higher soil organic carbon levels, while the oldest basins displayed an increase in only the gram-positive bacteria. While this study showed differences in microbial populations across the sites relevant to basin age, the dominance of Candidatus ‘M. stordalenmirensis’ across the chronosequence indicates the potential for changes in local carbon cycling, depending on how these methanogens and associated microbial communities respond to warming temperatures.
Q-Index Code C1
Q-Index Status Provisional Code
Institutional Status UQ

Document type: Journal Article
Sub-type: Article (original research)
Collections: Australian Centre for Ecogenomics
Official 2016 Collection
 
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