An analysis of the sensitivity of sap flux to soil and plant variables assessed for an Australian woodland using a soil-plant-atmosphere model

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dc.contributor.author Zeppel, Melanie en_US
dc.contributor.author Macinnis-Ng, Catriona en_US
dc.contributor.author Palmer, Anthony en_US
dc.contributor.author Taylor, Daniel en_US
dc.contributor.author Whitley, Rhys en_US
dc.contributor.author Fuentes, Sigfredo en_US
dc.contributor.author Yunusa, Isa en_US
dc.contributor.author Williams, Mathew en_US
dc.contributor.author Eamus, Derek en_US
dc.contributor.editor en_US
dc.date.accessioned 2010-05-28T09:44:17Z
dc.date.available 2010-05-28T09:44:17Z
dc.date.issued 2008 en_US
dc.identifier 2007004161 en_US
dc.identifier.citation Zeppel Melanie et al. 2008, 'An analysis of the sensitivity of sap flux to soil and plant variables assessed for an Australian woodland using a soil-plant-atmosphere model', CSIRO, vol. 35, pp. 509-520. en_US
dc.identifier.issn 1445-4408 en_US
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8591
dc.description.abstract Daily and seasonal patterns of tree water use were measured for the two dominant tree species, Angophora bakeri E.C.Hall (narrow-leaved apple) and Eucalyptus sclerophylla (Blakely) L.A.S. Johnson & Blaxell (scribbly gum), in a temperate, open, evergreen woodland using sap flow sensors, along with information about soil, leaf, tree and micro-climatological variables. The aims of this work were to: (a) validate a soil?plant?atmosphere (SPA) model for the specific site; (b) determine the total depth from which water uptake must occur to achieve the observed rates of tree sap flow; (c) examine whether the water content of the upper soil profile was a significant determinant of daily rates of sap flow; and (d) examine the sensitivity of sap flow to several biotic factors. It was found that: (a) the SPA model was able to accurately replicate the hourly, daily and seasonal patterns of sap flow; (b) water uptake must have occurred from depths of up to 3 m; (c) sap flow was independent of the water content of the top 80 cm of the soil profile; and (d) sap flow was very sensitive to the leaf area of the stand, whole tree hydraulic conductance and the critical water potential of the leaves, but insensitive to stem capacitance and increases in root biomass. These results are important to future studies of the regulation of vegetation water use, landscape-scale behaviour of vegetation, and to water resource managers, because they allow testing of large-scale management options without the need for large-scale manipulations of vegetation cover. en_US
dc.language en_US
dc.publisher CSIRO en_US
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon http://dx.doi.org/10.1071/FP08114 en_US
dc.title An analysis of the sensitivity of sap flux to soil and plant variables assessed for an Australian woodland using a soil-plant-atmosphere model en_US
dc.parent Functional Plant Biology en_US
dc.journal.volume 35 en_US
dc.journal.number en_US
dc.journal.number 6 en_US
dc.publocation Collingwood VIC, Australia en_US
dc.identifier.startpage 509 en_US
dc.identifier.endpage 520 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 060700 en_US
dc.personcode 034078 en_US
dc.personcode 980151 en_US
dc.personcode 995490 en_US
dc.personcode 040345 en_US
dc.personcode 996928 en_US
dc.personcode 997490 en_US
dc.personcode 030005 en_US
dc.personcode 0000020564 en_US
dc.personcode 000006 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 en_US
dc.description.keywords hydraulic conductance, narrow-leaved apple, scribbly gum, soil moisture, transpiration. en_US
dc.staffid 000006 en_US


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