Continental-scale climatic drivers of growth ring variability in an Australian conifer

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dc.contributor.authorBowman, DMJSen_AU
dc.contributor.authorPrior, LDen_AU
dc.contributor.authorTng, Den_AU
dc.contributor.authorHua, Qen_AU
dc.contributor.authorBrodribb, TJen_AU
dc.date.accessioned2012-04-30T06:04:06Zen_AU
dc.date.available2012-04-30T06:04:06Zen_AU
dc.date.issued2011-10-01en_AU
dc.date.statistics2012-04-30en_AU
dc.description.abstractCallitris is Australia's most successful and drought tolerant conifer genus. Callitris species are distributed across a huge geographical range from rainforest to arid zones, and hence they provide a rare opportunity to view plant growth trends across the continent. Here, we make a continental-scale examination of how climate influences basal diameter growth in Callitris. We sampled a total of five species but focused effort (23 of 28 samples) on the most widespread species, C. columellaris. Cores from a total of 23 trees were sampled from 15 sites that spanned a gradient in mean annual rainfall from 225 to 2117 mm and mean annual temperature from 11.5 to 28.2 degrees C. Ring production is not annual across much of the distribution of the genus, so C-14-AMS dating was used to establish the frequency of ring production for each core. Ring width, tracheid lumen diameter and number of tracheids per ring were also measured on each core. Ring production was close to annual at mesic sites with reliable alternation of rainfall or temperature regimes but was more erratic elsewhere. For C. columellaris, ring width significantly increased with mean annual rainfall (r(2) = 0.49) as a result of wider and more tracheids per ring. For this species tracheid lumen diameter was correlated with annual rainfall (r(2) = 0.61), with a threefold increase from the driest to the wettest sites, lending support to the hypothesis that conifers growing at drier sites will have narrow lumen diameters to maximise mechanical strength of the xylem. © 2011, Springer. The original publication is available at www.springerlink.comen_AU
dc.identifier.citationBowman, D. M. J. S., Prior, L. D., Tng, D. Y. P., Hua, Q., & Brodribb, T. J. (2011). Continental-scale climatic drivers of growth ring variability in an Australian conifer. Trees-Structure and Function, 25(5), 925-934. doi:10.1007/s00468-011-0567-5en_AU
dc.identifier.govdoc4127en_AU
dc.identifier.issn0931-1890en_AU
dc.identifier.issue5en_AU
dc.identifier.journaltitleTrees-Structure and Functionen_AU
dc.identifier.pagination925-934en_AU
dc.identifier.urihttp://dx.doi.org/10.1007/s00468-011-0567-5en_AU
dc.identifier.urihttp://apo.ansto.gov.au/dspace/handle/10238/4198en_AU
dc.identifier.volume25en_AU
dc.language.isoenen_AU
dc.publisherSpringeren_AU
dc.subjectAustraliaen_AU
dc.subjectClimatesen_AU
dc.subjectBiological variabilityen_AU
dc.subjectTree ringsen_AU
dc.subjectCarbon 14 beamsen_AU
dc.subjectCalibrationen_AU
dc.titleContinental-scale climatic drivers of growth ring variability in an Australian coniferen_AU
dc.typeJournal Articleen_AU
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