Convergence of tree water use within an arid-zone woodland

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dc.contributor.author O'Grady, Anthony en_US
dc.contributor.author Cook, Peter en_US
dc.contributor.author Eamus, Derek en_US
dc.contributor.author Duguid, A en_US
dc.contributor.author Wischusen, Jdh en_US
dc.contributor.author Fass, T en_US
dc.contributor.author Worldege, D en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:48:49Z
dc.date.available 2010-05-28T09:48:49Z
dc.date.issued 2009 en_US
dc.identifier 2008007816 en_US
dc.identifier.citation O'Grady Anthony et al. 2009, 'Convergence of tree water use within an arid-zone woodland', Springer, vol. 160, no. 4, pp. 643-655. en_US
dc.identifier.issn 0029-8549 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/9322
dc.description.abstract We examined spatial and temporal patterns of tree water use and aspects of hydraulic architecture in four common tree species of central Australia-Corymbia opaca, Eucalyptus victrix, E. camaldulensis and Acacia aneura-to better understand processes that constrain water use in these environments. These four widely distributed species occupy contrasting niches within arid environments including woodlands, floodplains and riparian environments. Measurements of tree water use and leaf water potential were made at two sites with contrasting water table depths during a period of high soil water availability following summer rainfall and during a period of low soil water availability following 7 months of very little rainfall during 2007. There were significant differences in specific leaf area (SLA), sapwood area to leaf area ratios and sapwood density between species. Sapwood to leaf area ratio increased in all species from April to November indicating a decline in leaf area per unit sapwood area. Despite very little rainfall in the intervening period three species, C. opaca, E. victrix and E. camaldulensis maintained high leaf water potentials and tree water use during both periods. In contrast, leaf water potential and water use in the A. aneura were significantly reduced in November compared to April. Despite contrasting morphology and water use strategies, we observed considerable convergence in water use among the four species. Wood density in particular was strongly related to SLA, sapwood area to leaf area ratios and soil to leaf conductance, with all four species converging on a common relationship. Identifying convergence in hydraulic traits can potentially provide powerful tools for scaling physiological processes in natural ecosystems. en_US
dc.language en_US
dc.publisher Springer en_US
dc.relation.isbasedon http://dx.doi.org/10.1007/s00442-009-1332-y en_US
dc.title Convergence of tree water use within an arid-zone woodland en_US
dc.parent Oecologia en_US
dc.journal.volume 160 en_US
dc.journal.number 4 en_US
dc.publocation New York en_US
dc.identifier.startpage 643 en_US
dc.identifier.endpage 655 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 060700 en_US
dc.personcode 0000024179 en_US
dc.personcode X000059 en_US
dc.personcode 000006 en_US
dc.personcode 0000052836 en_US
dc.personcode 0000052837 en_US
dc.personcode 0000052838 en_US
dc.personcode 0000052839 en_US
dc.percentage 100 en_US
dc.classification.name Plant Biology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity ISI:000267165500003 en_US
dc.description.keywords Groundwater; Sapwoodarea-to-leaf area ratio; Soil-to-leaf conductance; Transpiration; Wood density en_US


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