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dc.contributor.authorSainur Samad, M.
dc.contributor.authorBiswas, A.
dc.contributor.authorBakken, L. R.
dc.contributor.authorClough, Timothy J.
dc.contributor.authorde Klein, C. A. M.
dc.contributor.authorRichards, K. G.
dc.contributor.authorLanigan, G. J.
dc.contributor.authorMorales, S. E.
dc.identifier.citationSamad et al. (2016). Phylogenetic and functional potential links pH and N₂O emissions in pasture soils. Scientific Reports, 6:35990. doi:10.1038/srep35990
dc.description.abstractDenitrification is mediated by microbial, and physicochemical, processes leading to nitrogen loss via N₂O and N₂ emissions. Soil pH regulates the reduction of N₂O to N₂, however, it can also affect microbial community composition and functional potential. Here we simultaneously test the link between pH, community composition, and the N₂O emission ratio (N₂O/(NO + N₂O + N₂)) in 13 temperate pasture soils. Physicochemical analysis, gas kinetics, 16S rRNA amplicon sequencing, metagenomic and quantitative PCR (of denitrifier genes: nirS, nirK, nosZI and nosZII) analysis were carried out to characterize each soil. We found strong evidence linking pH to both N₂O emission ratio and community changes. Soil pH was negatively associated with N₂O emission ratio, while being positively associated with both community diversity and total denitrification gene (nir & nos) abundance. Abundance of nosZII was positively linked to pH, and negatively linked to N₂O emissions. Our results confirm that pH imposes a general selective pressure on the entire community and that this results in changes in emission potential. Our data also support the general model that with increased microbial diversity efficiency increases, demonstrated in this study with lowered N₂O emission ratio through more efficient conversion of N₂O to N₂.en
dc.publisherNature Publishing Group
dc.relationThe original publication is available from - Nature Publishing Group -
dc.rights© The Author(s) 2016. This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit
dc.subjectN₂O emissionsen
dc.subjectpasture soilsen
dc.subject.meshNitrous Oxideen
dc.subject.meshRNA, Ribosomal, 16Sen
dc.subject.meshSoil Microbiologyen
dc.subject.meshHydrogen-Ion Concentrationen
dc.subject.meshMicrobial Consortiaen
dc.subject.meshGenes, Microbialen
dc.subject.meshGreenhouse Gasesen
dc.titlePhylogenetic and functional potential links pH and N₂O emissions in pasture soilsen
dc.typeJournal Article
lu.contributor.unitLincoln University
lu.contributor.unitFaculty of Agriculture and Life Sciences
lu.contributor.unitDepartment of Soil and Physical Sciences
dc.subject.anzsrc0503 Soil Sciencesen
dc.subject.anzsrc0703 Crop and Pasture Productionen
dc.relation.isPartOfScientific Reportsen
pubs.notesScientific Reports 6:35990; doi: 10.1038/srep35990; published online 26 October 2016; updated on 06 December 2016 The original version of this Article contained errors in the spelling of the author Md Sainur Samad, which was incorrectly given as M.d. Sainur Samad.en
pubs.organisational-group/LU/Agriculture and Life Sciences
pubs.organisational-group/LU/Agriculture and Life Sciences/SOILS
pubs.organisational-group/LU/Research Management Office
pubs.organisational-group/LU/Research Management Office/QE18

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