Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils
Enzyme-mediated decomposition of soil organic matter (SOM) is controlled, amongst other factors, by organic matter properties and by the microbial decomposer community present. Since microbial community composition and SOM properties are often interrelated and both change with soil depth, the driver...
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Online Access: | http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976392 http://www.ncbi.nlm.nih.gov/pubmed/24705618 https://doi.org/10.1371/journal.pone.0094076 |
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ftpubmed:oai:pubmedcentral.nih.gov:3976392 2023-05-15T15:00:36+02:00 Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils Schnecker, Jörg Wild, Birgit Hofhansl, Florian Eloy Alves, Ricardo J. Bárta, Jiří Čapek, Petr Fuchslueger, Lucia Gentsch, Norman Gittel, Antje Guggenberger, Georg Hofer, Angelika Kienzl, Sandra Knoltsch, Anna Lashchinskiy, Nikolay Mikutta, Robert Šantrůčková, Hana Shibistova, Olga Takriti, Mounir Urich, Tim Weltin, Georg Richter, Andreas 2014-04-04 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976392 http://www.ncbi.nlm.nih.gov/pubmed/24705618 https://doi.org/10.1371/journal.pone.0094076 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976392 http://www.ncbi.nlm.nih.gov/pubmed/24705618 http://dx.doi.org/10.1371/journal.pone.0094076 This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2014 ftpubmed https://doi.org/10.1371/journal.pone.0094076 2014-04-13T00:44:57Z Enzyme-mediated decomposition of soil organic matter (SOM) is controlled, amongst other factors, by organic matter properties and by the microbial decomposer community present. Since microbial community composition and SOM properties are often interrelated and both change with soil depth, the drivers of enzymatic decomposition are hard to dissect. We investigated soils from three regions in the Siberian Arctic, where carbon rich topsoil material has been incorporated into the subsoil (cryoturbation). We took advantage of this subduction to test if SOM properties shape microbial community composition, and to identify controls of both on enzyme activities. We found that microbial community composition (estimated by phospholipid fatty acid analysis), was similar in cryoturbated material and in surrounding subsoil, although carbon and nitrogen contents were similar in cryoturbated material and topsoils. This suggests that the microbial community in cryoturbated material was not well adapted to SOM properties. We also measured three potential enzyme activities (cellobiohydrolase, leucine-amino-peptidase and phenoloxidase) and used structural equation models (SEMs) to identify direct and indirect drivers of the three enzyme activities. The models included microbial community composition, carbon and nitrogen contents, clay content, water content, and pH. Models for regular horizons, excluding cryoturbated material, showed that all enzyme activities were mainly controlled by carbon or nitrogen. Microbial community composition had no effect. In contrast, models for cryoturbated material showed that enzyme activities were also related to microbial community composition. The additional control of microbial community composition could have restrained enzyme activities and furthermore decomposition in general. The functional decoupling of SOM properties and microbial community composition might thus be one of the reasons for low decomposition rates and the persistence of 400 Gt carbon stored in cryoturbated material. Text Arctic PubMed Central (PMC) Arctic PLoS ONE 9 4 e94076 |
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Research Article Schnecker, Jörg Wild, Birgit Hofhansl, Florian Eloy Alves, Ricardo J. Bárta, Jiří Čapek, Petr Fuchslueger, Lucia Gentsch, Norman Gittel, Antje Guggenberger, Georg Hofer, Angelika Kienzl, Sandra Knoltsch, Anna Lashchinskiy, Nikolay Mikutta, Robert Šantrůčková, Hana Shibistova, Olga Takriti, Mounir Urich, Tim Weltin, Georg Richter, Andreas Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
topic_facet |
Research Article |
description |
Enzyme-mediated decomposition of soil organic matter (SOM) is controlled, amongst other factors, by organic matter properties and by the microbial decomposer community present. Since microbial community composition and SOM properties are often interrelated and both change with soil depth, the drivers of enzymatic decomposition are hard to dissect. We investigated soils from three regions in the Siberian Arctic, where carbon rich topsoil material has been incorporated into the subsoil (cryoturbation). We took advantage of this subduction to test if SOM properties shape microbial community composition, and to identify controls of both on enzyme activities. We found that microbial community composition (estimated by phospholipid fatty acid analysis), was similar in cryoturbated material and in surrounding subsoil, although carbon and nitrogen contents were similar in cryoturbated material and topsoils. This suggests that the microbial community in cryoturbated material was not well adapted to SOM properties. We also measured three potential enzyme activities (cellobiohydrolase, leucine-amino-peptidase and phenoloxidase) and used structural equation models (SEMs) to identify direct and indirect drivers of the three enzyme activities. The models included microbial community composition, carbon and nitrogen contents, clay content, water content, and pH. Models for regular horizons, excluding cryoturbated material, showed that all enzyme activities were mainly controlled by carbon or nitrogen. Microbial community composition had no effect. In contrast, models for cryoturbated material showed that enzyme activities were also related to microbial community composition. The additional control of microbial community composition could have restrained enzyme activities and furthermore decomposition in general. The functional decoupling of SOM properties and microbial community composition might thus be one of the reasons for low decomposition rates and the persistence of 400 Gt carbon stored in cryoturbated material. |
format |
Text |
author |
Schnecker, Jörg Wild, Birgit Hofhansl, Florian Eloy Alves, Ricardo J. Bárta, Jiří Čapek, Petr Fuchslueger, Lucia Gentsch, Norman Gittel, Antje Guggenberger, Georg Hofer, Angelika Kienzl, Sandra Knoltsch, Anna Lashchinskiy, Nikolay Mikutta, Robert Šantrůčková, Hana Shibistova, Olga Takriti, Mounir Urich, Tim Weltin, Georg Richter, Andreas |
author_facet |
Schnecker, Jörg Wild, Birgit Hofhansl, Florian Eloy Alves, Ricardo J. Bárta, Jiří Čapek, Petr Fuchslueger, Lucia Gentsch, Norman Gittel, Antje Guggenberger, Georg Hofer, Angelika Kienzl, Sandra Knoltsch, Anna Lashchinskiy, Nikolay Mikutta, Robert Šantrůčková, Hana Shibistova, Olga Takriti, Mounir Urich, Tim Weltin, Georg Richter, Andreas |
author_sort |
Schnecker, Jörg |
title |
Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
title_short |
Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
title_full |
Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
title_fullStr |
Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
title_full_unstemmed |
Effects of Soil Organic Matter Properties and Microbial Community Composition on Enzyme Activities in Cryoturbated Arctic Soils |
title_sort |
effects of soil organic matter properties and microbial community composition on enzyme activities in cryoturbated arctic soils |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976392 http://www.ncbi.nlm.nih.gov/pubmed/24705618 https://doi.org/10.1371/journal.pone.0094076 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic |
genre_facet |
Arctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3976392 http://www.ncbi.nlm.nih.gov/pubmed/24705618 http://dx.doi.org/10.1371/journal.pone.0094076 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0094076 |
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PLoS ONE |
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9 |
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4 |
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e94076 |
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