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Drivers of the microbial metabolic quotient across global grasslands

2023-06Artigo científico Acesso aberto
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dc.contributor.authorRisch, A. C.
dc.contributor.authorZimmermann, S.
dc.contributor.authorSchütz, M.
dc.contributor.authorBorer, E. T.
dc.contributor.authorBroadbent, A. A. D.
dc.contributor.authorCaldeira, M C
dc.contributor.authorDavies, K. F.
dc.contributor.authorEisenhauer, N.
dc.contributor.authorEskelinen, A.
dc.contributor.authorFay, P. A.
dc.contributor.authorHagedorn, F.
dc.contributor.authorKnops, J. M. H.
dc.contributor.authorLembrechts, J. J.
dc.contributor.authorMacDougall, A. S.
dc.contributor.authorMcCulley, R. L.
dc.contributor.authorMelbourne, B. A.
dc.contributor.authorMoore, J. L.
dc.contributor.authorPower, S. A.
dc.contributor.authorSeabloom, E. W.
dc.contributor.authorSilviera, M. L.
dc.contributor.authorVirtanen, R.
dc.contributor.authorYahdjian, L.
dc.contributor.authorOchoa-Hueso, R.
dc.date.accessioned2024-03-26T14:13:10Z
dc.date.available2024-03-26T14:13:10Z
dc.date.issued2023-06
dc.description.abstractAim: The microbial metabolic quotient (MMQ; mg CO2-C/ mg MBC/h), defined as the amount of microbial CO2 respired (MR; mg CO2-C/ kg soil/h) per unit of microbial biomass C (MBC; mg C/kg soil), is a key parameter for understanding the microbial regulation of the carbon (C) cycle, including soil C sequestration. Here, we experimentally tested hypotheses about the individual and interactive effects of multiple nutrient addition (nitrogen + phosphorus + potassium + micronutrients) and herbivore exclusion on MR, MBC and MMQ across 23 sites (five continents). Our sites encompassed a wide range of edaphoclimatic conditions; thus, we assessed which edaphoclimatic variables affected MMQ the most and how they interacted with our treatments. Location: Australia, Asia, Europe, North/South America. Time period: 2015–2016. Major taxa: Soil microbes. Methods: Soils were collected from plots with established experimental treatments. MR was assessed in a 5-week laboratory incubation without glucose addition, MBC via substrate-induced respiration. MMQ was calculated as MR/MBC and corrected for soil temperatures (MMQsoil). Using linear mixed effects models (LMMs) and structural equation models (SEMs), we analysed how edaphoclimatic characteristics and treatments interactively affected MMQsoil. Results: MMQsoil was higher in locations with higher mean annual temperature, lower water holding capacity and lower soil organic C concentration, but did not respond to our treatments across sites as neither MR nor MBC changed. We attributed this relative homeostasis to our treatments to the modulating influence of edaphoclimatic variables. For example, herbivore exclusion, regardless of fertilization, led to greater MMQsoil only at sites with lower soil organic C (< 1.7%). Main conclusions: Our results pinpoint the main variables related to MMQsoil across grasslands and emphasize the importance of the local edaphoclimatic conditions in controlling the response of the C cycle to anthropogenic stressors. By testing hypotheses about MMQsoil across global edaphoclimatic gradients, this work also helps to align the conflicting results of prior studies.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationRisch, A. C., Zimmermann, S., Schütz, M., Borer, E. T., Broadbent, A. A. D., Caldeira, M. C., Davies, K. F., Eisenhauer, N., Eskelinen, A., Fay, P. A., Hagedorn, F., Knops, J. M. H., Lembrechts, J. J., MacDougall, A. S., McCulley, R. L., Melbourne, B. A., Moore, J. L., Power, S. A., Seabloom, E. W. … Ochoa-Hueso, R. (2023). Drivers of the microbial metabolic quotient across global grasslands. Global Ecology and Biogeography, 32, 904–918.pt_PT
dc.identifier.doi10.1111/ geb.13664pt_PT
dc.identifier.urihttp://hdl.handle.net/10400.5/30484
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.publisherWileypt_PT
dc.relationForest Research Centre
dc.relation.publisherversionwileyonlinelibrary.com/journal/gebpt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectanthropogenic managementpt_PT
dc.subjectclimatept_PT
dc.subjectherbivore exclusionpt_PT
dc.subjectmicrobial biomass carbonpt_PT
dc.subjectmicrobial respirationpt_PT
dc.subjectnutrient additionpt_PT
dc.subjectNutrient Network: A Global Research Cooperative (NutNet)pt_PT
dc.subjectsoil propertiespt_PT
dc.titleDrivers of the microbial metabolic quotient across global grasslandspt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardNumberUID/AGR/00239/2019
oaire.awardTitleForest Research Centre
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FAGR%2F00239%2F2019/PT
oaire.citation.endPage918pt_PT
oaire.citation.issue6pt_PT
oaire.citation.startPage904pt_PT
oaire.citation.titleGlobal Ecology and Biogeographypt_PT
oaire.citation.volume32pt_PT
oaire.fundingStream6817 - DCRRNI ID
person.familyNameda Conceição Brálio de Brito Caldeira
person.givenNameMaria
person.identifier.ciencia-idC816-E9F6-8272
person.identifier.orcid0000-0002-3586-8526
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsopenAccesspt_PT
rcaap.typearticlept_PT
relation.isAuthorOfPublication8d30abe1-834f-4610-8f7e-62c0add60582
relation.isAuthorOfPublication.latestForDiscovery8d30abe1-834f-4610-8f7e-62c0add60582
relation.isProjectOfPublication6a9ac754-44c8-4fda-854c-879148c1ac4e
relation.isProjectOfPublication.latestForDiscovery6a9ac754-44c8-4fda-854c-879148c1ac4e

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