Show simple item record  

dc.contributor.authorNiederberger, Thomas D.en_NZ
dc.contributor.authorSohm, Jill A.en_NZ
dc.contributor.authorGunderson, Troyen_NZ
dc.contributor.authorTirindelli, Joëlleen_NZ
dc.contributor.authorCapone, Douglas G.en_NZ
dc.contributor.authorCarpenter, Edward J.en_NZ
dc.contributor.authorCary, S. Craigen_NZ
dc.date.accessioned2016-01-17T22:44:23Z
dc.date.available2015en_NZ
dc.date.available2016-01-17T22:44:23Z
dc.date.issued2015en_NZ
dc.identifier.citationNiederberger, T. D., Sohm, J. A., Gunderson, T., Tirindelli, J., Capone, D. G., Carpenter, E. J., & Cary, S. C. (2015). Carbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soils. Frontiers in Microbiology. http://doi.org/10.3389/fmicb.2015.01347en
dc.identifier.issn1664-302Xen_NZ
dc.identifier.urihttps://hdl.handle.net/10289/9864
dc.description.abstractCarbon-fixation is a critical process in severely oligotrophic Antarctic Dry Valley (DV) soils and may represent the major source of carbon in these arid environments. However, rates of C-fixation in DVs are currently unknown and the microorganisms responsible for these activities unidentified. In this study, C-fixation rates measured in the bulk arid soils (<5% moisture) ranged from below detection limits to ∼12 nmol C/cc/h. Rates in ephemerally wet soils ranged from ∼20 to 750 nmol C/cc/h, equating to turnover rates of ∼7–140 days, with lower rates in stream-associated soils as compared to lake-associated soils. Sequencing of the large subunit of RuBisCO (cbbL) in these soils identified green-type sequences dominated by the 1B cyanobacterial phylotype in both arid and wet soils including the RNA fraction of the wet soil. Red-type cbbL genes were dominated by 1C actinobacterial phylotypes in arid soils, with wetted soils containing nearly equal proportions of 1C (actinobacterial and proteobacterial signatures) and 1D (algal) phylotypes. Complementary 16S rRNA and 18S rRNA gene sequencing also revealed distinct differences in community structure between biotopes. This study is the first of its kind to examine C-fixation rates in DV soils and the microorganisms potentially responsible for these activities.
dc.format.mimetypeapplication/pdf
dc.language.isoen
dc.publisherFrontiersen_NZ
dc.relation.urihttp://journal.frontiersin.org/article/10.3389/fmicb.2015.01347/abstracten_NZ
dc.rights© 2015 Niederberger, Sohm, Gunderson, Tirindelli, Capone, Carpenter and Cary. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.
dc.subjectCO₂ fixationen_NZ
dc.subjectAntarctic soilsen_NZ
dc.subjectprimary productionen_NZ
dc.subjectDry Valleysen_NZ
dc.subjectmicrobial communitiesen_NZ
dc.titleCarbon-fixation rates and associated microbial communities residing in arid and ephemerally wet Antarctic Dry Valley soilsen_NZ
dc.typeJournal Article
dc.identifier.doi10.3389/fmicb.2015.01347en_NZ
dc.relation.isPartOfFrontiers in Microbiologyen_NZ
pubs.begin-page1347en_NZ
pubs.elements-id135430
pubs.issueDECen_NZ
pubs.volume6en_NZ
uow.identifier.article-noARTN 1347en_NZ


Files in this item

This item appears in the following Collection(s)

Show simple item record