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dc.contributor.authorLi, Xiaoxiang
dc.contributor.authorLiang, Eryuan
dc.contributor.authorGri?ar, Jozica
dc.contributor.authorRossi, Sergio
dc.contributor.authorCufar, Katarina
dc.contributor.authorEllison, Aaron M.
dc.date.accessioned2017-07-14T16:51:50Z
dash.embargo.terms2018-06-16
dc.date.issued2017
dc.identifierQuick submit: 2017-05-04T11:53:21-0400
dc.identifier.citationLi, Xiaoxia, Eryuan Liang, Jozica Gricar, Sergio Rossi, Katarina Cufar, and Aaron M. Ellison. 2017. “Critical Minimum Temperature Limits Xylogenesis and Maintains Treelines on the Southeastern Tibetan Plateau.” Science Bulletin 62 (11) (June): 804–812. doi:10.1016/j.scib.2017.04.025.en_US
dc.identifier.issn2095-9273en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:33444606
dc.description.abstractPhysiological and ecological mechanisms that define treelines are still debated. It has been suggested that the absence of trees above the treeline is caused by low temperatures that limit growth. Thus, we hypothesized that there is a critical minimum temperature (CTmin) preventing xylogenesis at treeline. We tested this hypothesis by examining weekly xylogenesis across three and four growing seasons in two natural Smith fir (Abies georgei var. smithii) treeline sites on the southeastern Tibetan Plateau. Despite differences in the timing of cell differentiation among years, minimum air temperature was the dominant climatic variable associated with xylem growth; the critical minimum temperature (CTmin) for the onset and end of xylogenesis occurred at 0.7±0.4 °C. A process-based modelling chronology of tree-ring formation using this CTmin was consistent with actual tree-ring data. This extremely low CTmin permits Smith fir growing at treeline to complete annual xylem production and maturation and provides both support and a mechanism for treeline formation.en_US
dc.description.sponsorshipOrganismic and Evolutionary Biologyen_US
dc.language.isoen_USen_US
dc.publisherElsevier BVen_US
dc.relation.isversionofdoi:10.1016/j.scib.2017.04.025en_US
dash.licenseLAA
dc.titleCritical minimum temperature limits xylogenesis and maintains treelines on the southeastern Tibetan Plateauen_US
dc.typeJournal Articleen_US
dc.date.updated2017-05-04T15:53:05Z
dc.description.versionAccepted Manuscripten_US
dc.relation.journalScience Bulletinen_US
dash.depositing.authorEllison, Aaron M.
dc.date.available2018-06-16T07:30:53Z
dc.identifier.doi10.1016/j.scib.2017.04.025*
workflow.legacycommentscat.complete Given the standard Elsevier 12-month embargoen_US
dash.authorsorderedfalse
dash.contributor.affiliatedLi, Xiaoxiang
dash.contributor.affiliatedEllison, Aaron
dc.identifier.orcid0000-0003-4151-6081


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