Distinct microbial communities associated with buried soils in the Siberian tundra
Abstract 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...
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Online Access: | http://dx.doi.org/10.1038/ismej.2013.219 http://www.nature.com/articles/ismej2013219.pdf http://www.nature.com/articles/ismej2013219 https://academic.oup.com/ismej/article-pdf/8/4/841/56288245/41396_2014_article_bfismej2013219.pdf |
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croxfordunivpr:10.1038/ismej.2013.219 2024-10-06T13:52:08+00:00 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 2013 http://dx.doi.org/10.1038/ismej.2013.219 http://www.nature.com/articles/ismej2013219.pdf http://www.nature.com/articles/ismej2013219 https://academic.oup.com/ismej/article-pdf/8/4/841/56288245/41396_2014_article_bfismej2013219.pdf en eng Oxford University Press (OUP) https://academic.oup.com/pages/standard-publication-reuse-rights The ISME Journal volume 8, issue 4, page 841-853 ISSN 1751-7362 1751-7370 journal-article 2013 croxfordunivpr https://doi.org/10.1038/ismej.2013.219 2024-09-10T04:14:59Z Abstract 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. Article in Journal/Newspaper permafrost Tundra Oxford University Press The ISME Journal 8 4 841 853 |
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Open Polar |
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Oxford University Press |
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croxfordunivpr |
language |
English |
description |
Abstract 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. |
format |
Article in Journal/Newspaper |
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 |
spellingShingle |
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 |
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 |
Oxford University Press (OUP) |
publishDate |
2013 |
url |
http://dx.doi.org/10.1038/ismej.2013.219 http://www.nature.com/articles/ismej2013219.pdf http://www.nature.com/articles/ismej2013219 https://academic.oup.com/ismej/article-pdf/8/4/841/56288245/41396_2014_article_bfismej2013219.pdf |
genre |
permafrost Tundra |
genre_facet |
permafrost Tundra |
op_source |
The ISME Journal volume 8, issue 4, page 841-853 ISSN 1751-7362 1751-7370 |
op_rights |
https://academic.oup.com/pages/standard-publication-reuse-rights |
op_doi |
https://doi.org/10.1038/ismej.2013.219 |
container_title |
The ISME Journal |
container_volume |
8 |
container_issue |
4 |
container_start_page |
841 |
op_container_end_page |
853 |
_version_ |
1812180462057029632 |