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dc.contributor.authorRiveros-Iregui, Diego A
dc.contributor.authorLorenzo, Theresa M
dc.contributor.authorLiang, Liyin L
dc.contributor.authorHu, Jia
dc.date.accessioned2018-06-13T22:26:32Z
dc.date.available2018-06-13T22:26:32Z
dc.date.issued2018-05-10
dc.identifier.citationRiveros-Iregui DA, Lorenzo TM, Liang LL, Hu J (2018) Summer dry-down modulates the isotopic composition of soil CO2 production in snow-dominated landscapes. PLoS ONE 13(5): e0197471. https://doi.org/10.1371/journal.pone.0197471en_US
dc.identifier.issn1932-6203
dc.identifier.pmid29746589
dc.identifier.doi10.1371/journal.pone.0197471
dc.identifier.urihttp://hdl.handle.net/10150/627964
dc.description.abstractIn mountainous landscapes, soil moisture is highly dynamic due to the effects of topography and the temporal variability imposed by seasonal precipitation, including rainfall and snow. Soil moisture is known to affect ecosystem carbon exchange both aboveground and belowground, as well as the stable isotopic composition of exchanged CO2. In this study we used an extensive suite of measurements to examine the effects of seasonal changes in soil moisture on the isotopic composition of soil CO2 production at the landscape level. We show that the seasonal decline in soil moisture (i.e., summer dry-down) appeared to impose a trend in the δ13C of soil CO2 production (δP) with more negative δP early in the growing season when soils were wet, and more positive δP as the growing season progressed and soils dried out. This seemingly generalizable pattern for a snow-dominated watershed is likely to represent the variability of recently assimilated C, tracked through the plant-soil system and imprinted in the respired CO2. Thus, our observations suggest that, at least for mountainous environments, seasonal changes in δP are largely mediated by soil moisture and their spatial variability is partially organized by topography.en_US
dc.description.sponsorshipU.S. Department of Agriculture [2012-67019-19360]; Department of Geography at UNC-Chapel Hillen_US
dc.language.isoenen_US
dc.publisherPUBLIC LIBRARY SCIENCEen_US
dc.relation.urlhttp://journals.plos.org/plosone/article?id=10.1371/journal.pone.0197471en_US
dc.rights© 2018 Riveros-Iregui et al. This is an open access article distributed under the terms of the Creative Commons Attribution License.en_US
dc.titleSummer dry-down modulates the isotopic composition of soil CO2 production in snow-dominated landscapes.en_US
dc.typeArticleen_US
dc.contributor.departmentUniv Arizona, Sch Nat Resources & Environmen_US
dc.identifier.journalPLOS ONEen_US
dc.description.noteOpen access journal.en_US
dc.description.collectioninformationThis item from the UA Faculty Publications collection is made available by the University of Arizona with support from the University of Arizona Libraries. If you have questions, please contact us at repository@u.library.arizona.edu.en_US
dc.eprint.versionFinal published versionen_US
dc.source.journaltitlePloS one
refterms.dateFOA2018-06-13T22:26:33Z


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