Effects of soil organic matter properties and microbial community composition on enzyme activities in cryoturbated arctic soils

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dc.identifier.uri http://dx.doi.org/10.15488/966
dc.identifier.uri http://www.repo.uni-hannover.de/handle/123456789/990
dc.contributor.author Schnecker, Jörg
dc.contributor.author Wild, Birgit
dc.contributor.author Hofhansl, Florian
dc.contributor.author Alves, Ricardo J. Eloy
dc.contributor.author Barta, Jin
dc.contributor.author Čapek, Petr
dc.contributor.author Fuchslueger, Lucia
dc.contributor.author Gentsch, Norman
dc.contributor.author Gittel, Antje
dc.contributor.author Guggenberger, Georg
dc.contributor.author Hofer, Angelika
dc.contributor.author Kienzl, Sandra
dc.contributor.author Knoltsch, Anna
dc.contributor.author Lashchinskiy, Nikolay
dc.contributor.author Mikutta, Robert
dc.contributor.author Šantrůčková, Hana
dc.contributor.author Shibistova, Olga
dc.contributor.author Takriti, Mounir
dc.contributor.author Urich, Tim
dc.contributor.author Weltin, Georg
dc.contributor.author Richter, Andreas
dc.date.accessioned 2016-12-22T07:48:56Z
dc.date.available 2016-12-22T07:48:56Z
dc.date.issued 2014
dc.identifier.citation Schnecker, J.; Wild, B.; Hofhansl, F.; Alves, R.J.E.; Bárta, J.; et al.: Effects of soil organic matter properties and microbial community composition on enzyme activities in cryoturbated arctic soils. In: PLoS ONE 9 (2014), Nr. 4, e94076. DOI: https://doi.org/10.1371/journal.pone.0094076
dc.description.abstract 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. eng
dc.language.iso eng
dc.publisher San Francisco : Public Library of Science
dc.relation.ispartofseries PLoS ONE 9 (2014)
dc.rights CC BY 4.0 Unported
dc.rights.uri https://creativecommons.org/licenses/by/4.0/
dc.subject cellulose 1,4 beta cellobiosidase eng
dc.subject cytosol aminopeptidase eng
dc.subject fatty acid eng
dc.subject monophenol monooxygenase eng
dc.subject nitrogen eng
dc.subject soil organic matter eng
dc.subject enzyme eng
dc.subject soil eng
dc.subject Arctic eng
dc.subject carbon mineralization eng
dc.subject controlled study eng
dc.subject decomposition eng
dc.subject enzyme activity eng
dc.subject geographic distribution eng
dc.subject microbial activity eng
dc.subject microbial community eng
dc.subject nitrogen mineralization eng
dc.subject nonhuman eng
dc.subject pH eng
dc.subject soil analysis eng
dc.subject soil depth eng
dc.subject soil property eng
dc.subject species composition eng
dc.subject structural equation modeling eng
dc.subject water content eng
dc.subject chemistry eng
dc.subject enzyme activation eng
dc.subject geography eng
dc.subject hydrolysis eng
dc.subject metabolism eng
dc.subject microbiology eng
dc.subject microflora eng
dc.subject Russian Federation eng
dc.subject Carbon eng
dc.subject Enzyme Activation eng
dc.subject Enzymes eng
dc.subject Geography eng
dc.subject Hydrolysis eng
dc.subject Microbiota eng
dc.subject Nitrogen eng
dc.subject Siberia eng
dc.subject Soil Microbiology eng
dc.subject.ddc 550 | Geowissenschaften ger
dc.title Effects of soil organic matter properties and microbial community composition on enzyme activities in cryoturbated arctic soils
dc.type Article
dc.type Text
dc.relation.issn 19326203
dc.relation.doi https://doi.org/10.1371/journal.pone.0094076
dc.bibliographicCitation.issue 4
dc.bibliographicCitation.volume 9
dc.bibliographicCitation.firstPage e94076
dc.description.version publishedVersion
tib.accessRights frei zug�nglich

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