Microorganisms for soil treatment.
Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial...
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fthzmuenchen:oai:opus-zb.helmholtz-muenchen.de:31072 2023-05-15T14:57:17+02:00 Microorganisms for soil treatment. Pérez-de-Mora, A. Laquitaine, L. Gaspard, S. 2014-01-01 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=31072 https://doi.org/10.1039/9781849737142-00144 eng eng info:eu-repo/semantics/altIdentifier/doi/10.1039/9781849737142-00144 info:eu-repo/semantics/altIdentifier/isbn/1757-7047 info:eu-repo/semantics/altIdentifier/pissn/1757-7047 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=31072 doi:10.1039/9781849737142-00144 urn:isbn:1757-7047 urn:issn:1757-7047 info:eu-repo/semantics/closedAccess RSC Green Chem., 144-221 (2014) Text info:eu-repo/semantics/article 2014 fthzmuenchen https://doi.org/10.1039/9781849737142-00144 2022-11-20T09:00:27Z Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial processes and possibly resulting in exacerbated carbon degradation under increasing anoxic conditions. To identify current microbial assemblages in carbon rich, water saturated permafrost environments, four polygonal tundra sites were investigated on Herschel Island and the Yukon Coast, Western Canadian Arctic. Ion Torrent sequencing of bacterial and archaeal 16S rRNA amplicons revealed the presence of all major microbial soil groups and indicated a local, vertical heterogeneity of the polygonal tundra soil community with increasing depth. Microbial diversity was found to be highest in the surface layers, decreasing towards the permafrost table. Quantitative PCR analysis of functional genes involved in carbon and nitrogen-cycling revealed a high functional potential in the surface layers, decreasing with increasing active layer depth. We observed that soil properties driving microbial diversity and functional potential varied in each study site. These results highlight the small-scale heterogeneity of geomorphologically comparable sites, greatly restricting generalizations about the fate of permafrost-affected environments in a warming Arctic. Article in Journal/Newspaper Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon PuSH - Publikationsserver des Helmholtz Zentrums München Arctic Herschel Island ENVELOPE(-139.089,-139.089,69.583,69.583) Yukon 144 221 |
institution |
Open Polar |
collection |
PuSH - Publikationsserver des Helmholtz Zentrums München |
op_collection_id |
fthzmuenchen |
language |
English |
description |
Permafrost-affected soils are among the most obvious ecosystems in which current microbial controls on organic matter decomposition are changing as a result of global warming. Warmer conditions in polygonal tundra will lead to a deepening of the seasonal active layer, provoking changes in microbial processes and possibly resulting in exacerbated carbon degradation under increasing anoxic conditions. To identify current microbial assemblages in carbon rich, water saturated permafrost environments, four polygonal tundra sites were investigated on Herschel Island and the Yukon Coast, Western Canadian Arctic. Ion Torrent sequencing of bacterial and archaeal 16S rRNA amplicons revealed the presence of all major microbial soil groups and indicated a local, vertical heterogeneity of the polygonal tundra soil community with increasing depth. Microbial diversity was found to be highest in the surface layers, decreasing towards the permafrost table. Quantitative PCR analysis of functional genes involved in carbon and nitrogen-cycling revealed a high functional potential in the surface layers, decreasing with increasing active layer depth. We observed that soil properties driving microbial diversity and functional potential varied in each study site. These results highlight the small-scale heterogeneity of geomorphologically comparable sites, greatly restricting generalizations about the fate of permafrost-affected environments in a warming Arctic. |
format |
Article in Journal/Newspaper |
author |
Pérez-de-Mora, A. Laquitaine, L. Gaspard, S. |
spellingShingle |
Pérez-de-Mora, A. Laquitaine, L. Gaspard, S. Microorganisms for soil treatment. |
author_facet |
Pérez-de-Mora, A. Laquitaine, L. Gaspard, S. |
author_sort |
Pérez-de-Mora, A. |
title |
Microorganisms for soil treatment. |
title_short |
Microorganisms for soil treatment. |
title_full |
Microorganisms for soil treatment. |
title_fullStr |
Microorganisms for soil treatment. |
title_full_unstemmed |
Microorganisms for soil treatment. |
title_sort |
microorganisms for soil treatment. |
publishDate |
2014 |
url |
https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=31072 https://doi.org/10.1039/9781849737142-00144 |
long_lat |
ENVELOPE(-139.089,-139.089,69.583,69.583) |
geographic |
Arctic Herschel Island Yukon |
geographic_facet |
Arctic Herschel Island Yukon |
genre |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
genre_facet |
Arctic Global warming Herschel Herschel Island permafrost Tundra Yukon |
op_source |
RSC Green Chem., 144-221 (2014) |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1039/9781849737142-00144 info:eu-repo/semantics/altIdentifier/isbn/1757-7047 info:eu-repo/semantics/altIdentifier/pissn/1757-7047 https://push-zb.helmholtz-muenchen.de/frontdoor.php?source_opus=31072 doi:10.1039/9781849737142-00144 urn:isbn:1757-7047 urn:issn:1757-7047 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1039/9781849737142-00144 |
container_start_page |
144 |
op_container_end_page |
221 |
_version_ |
1766329362534105088 |