Distinct microbial communities associated with buried soils in the Siberian tundra
Cryoturbation, the burial of topsoil material into deeper soil horizons by repeated freeze–thaw events, is an important storage mechanism for soil organic matter (SOM) in permafrost-affected soils. Besides abiotic conditions, microbial community structure and the accessibility of SOM to the decompos...
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ftpubmed:oai:pubmedcentral.nih.gov:3960545 2023-05-15T17:57:32+02:00 Distinct microbial communities associated with buried soils in the Siberian tundra Gittel, Antje Bárta, Jiří Kohoutová, Iva Mikutta, Robert Owens, Sarah Gilbert, Jack Schnecker, Jörg Wild, Birgit Hannisdal, Bjarte Maerz, Joeran Lashchinskiy, Nikolay Čapek, Petr Šantrůčková, Hana Gentsch, Norman Shibistova, Olga Guggenberger, Georg Richter, Andreas Torsvik, Vigdis L Schleper, Christa Urich, Tim 2014-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3960545 http://www.ncbi.nlm.nih.gov/pubmed/24335828 https://doi.org/10.1038/ismej.2013.219 en eng Nature Publishing Group http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24335828 http://dx.doi.org/10.1038/ismej.2013.219 Copyright © 2014 International Society for Microbial Ecology Original Article Text 2014 ftpubmed https://doi.org/10.1038/ismej.2013.219 2015-04-04T23:57:25Z Cryoturbation, the burial of topsoil material into deeper soil horizons by repeated freeze–thaw events, is an important storage mechanism for soil organic matter (SOM) in permafrost-affected soils. Besides abiotic conditions, microbial community structure and the accessibility of SOM to the decomposer community are hypothesized to control SOM decomposition and thus have a crucial role in SOM accumulation in buried soils. We surveyed the microbial community structure in cryoturbated soils from nine soil profiles in the northeastern Siberian tundra using high-throughput sequencing and quantification of bacterial, archaeal and fungal marker genes. We found that bacterial abundances in buried topsoils were as high as in unburied topsoils. In contrast, fungal abundances decreased with depth and were significantly lower in buried than in unburied topsoils resulting in remarkably low fungal to bacterial ratios in buried topsoils. Fungal community profiling revealed an associated decrease in presumably ectomycorrhizal (ECM) fungi. The abiotic conditions (low to subzero temperatures, anoxia) and the reduced abundance of fungi likely provide a niche for bacterial, facultative anaerobic decomposers of SOM such as members of the Actinobacteria, which were found in significantly higher relative abundances in buried than in unburied topsoils. Our study expands the knowledge on the microbial community structure in soils of Northern latitude permafrost regions, and attributes the delayed decomposition of SOM in buried soils to specific microbial taxa, and particularly to a decrease in abundance and activity of ECM fungi, and to the extent to which bacterial decomposers are able to act as their functional substitutes. Text permafrost Tundra PubMed Central (PMC) The ISME Journal 8 4 841 853 |
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Original Article Gittel, Antje Bárta, Jiří Kohoutová, Iva Mikutta, Robert Owens, Sarah Gilbert, Jack Schnecker, Jörg Wild, Birgit Hannisdal, Bjarte Maerz, Joeran Lashchinskiy, Nikolay Čapek, Petr Šantrůčková, Hana Gentsch, Norman Shibistova, Olga Guggenberger, Georg Richter, Andreas Torsvik, Vigdis L Schleper, Christa Urich, Tim Distinct microbial communities associated with buried soils in the Siberian tundra |
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Original Article |
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Cryoturbation, the burial of topsoil material into deeper soil horizons by repeated freeze–thaw events, is an important storage mechanism for soil organic matter (SOM) in permafrost-affected soils. Besides abiotic conditions, microbial community structure and the accessibility of SOM to the decomposer community are hypothesized to control SOM decomposition and thus have a crucial role in SOM accumulation in buried soils. We surveyed the microbial community structure in cryoturbated soils from nine soil profiles in the northeastern Siberian tundra using high-throughput sequencing and quantification of bacterial, archaeal and fungal marker genes. We found that bacterial abundances in buried topsoils were as high as in unburied topsoils. In contrast, fungal abundances decreased with depth and were significantly lower in buried than in unburied topsoils resulting in remarkably low fungal to bacterial ratios in buried topsoils. Fungal community profiling revealed an associated decrease in presumably ectomycorrhizal (ECM) fungi. The abiotic conditions (low to subzero temperatures, anoxia) and the reduced abundance of fungi likely provide a niche for bacterial, facultative anaerobic decomposers of SOM such as members of the Actinobacteria, which were found in significantly higher relative abundances in buried than in unburied topsoils. Our study expands the knowledge on the microbial community structure in soils of Northern latitude permafrost regions, and attributes the delayed decomposition of SOM in buried soils to specific microbial taxa, and particularly to a decrease in abundance and activity of ECM fungi, and to the extent to which bacterial decomposers are able to act as their functional substitutes. |
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author |
Gittel, Antje Bárta, Jiří Kohoutová, Iva Mikutta, Robert Owens, Sarah Gilbert, Jack Schnecker, Jörg Wild, Birgit Hannisdal, Bjarte Maerz, Joeran Lashchinskiy, Nikolay Čapek, Petr Šantrůčková, Hana Gentsch, Norman Shibistova, Olga Guggenberger, Georg Richter, Andreas Torsvik, Vigdis L Schleper, Christa Urich, Tim |
author_facet |
Gittel, Antje Bárta, Jiří Kohoutová, Iva Mikutta, Robert Owens, Sarah Gilbert, Jack Schnecker, Jörg Wild, Birgit Hannisdal, Bjarte Maerz, Joeran Lashchinskiy, Nikolay Čapek, Petr Šantrůčková, Hana Gentsch, Norman Shibistova, Olga Guggenberger, Georg Richter, Andreas Torsvik, Vigdis L Schleper, Christa Urich, Tim |
author_sort |
Gittel, Antje |
title |
Distinct microbial communities associated with buried soils in the Siberian tundra |
title_short |
Distinct microbial communities associated with buried soils in the Siberian tundra |
title_full |
Distinct microbial communities associated with buried soils in the Siberian tundra |
title_fullStr |
Distinct microbial communities associated with buried soils in the Siberian tundra |
title_full_unstemmed |
Distinct microbial communities associated with buried soils in the Siberian tundra |
title_sort |
distinct microbial communities associated with buried soils in the siberian tundra |
publisher |
Nature Publishing Group |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3960545 http://www.ncbi.nlm.nih.gov/pubmed/24335828 https://doi.org/10.1038/ismej.2013.219 |
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permafrost Tundra |
genre_facet |
permafrost Tundra |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC http://www.ncbi.nlm.nih.gov/pubmed/24335828 http://dx.doi.org/10.1038/ismej.2013.219 |
op_rights |
Copyright © 2014 International Society for Microbial Ecology |
op_doi |
https://doi.org/10.1038/ismej.2013.219 |
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The ISME Journal |
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1766165989385306112 |