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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Show simple item record Zeppel, M MacInnis-Ng, C Palmer, A Taylor, D Whitley, R Fuentes, S Yunusa, I Williams, M Eamus, D 2010-05-28T09:44:17Z 2008
dc.identifier.citation Functional Plant Biology, 2008, 35 (6), pp. 509 - 520
dc.identifier.issn 1445-4408
dc.identifier.other C1 en_US
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. © CSIRO 2008.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1071/FP08114
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
dc.type Journal Article
dc.parent Functional Plant Biology
dc.journal.volume 6
dc.journal.volume 35
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 SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0607 Plant Biology
dc.personcode 000006
dc.personcode 980151
dc.personcode 030005
dc.personcode 034078
dc.personcode 040345
dc.personcode 995490
dc.personcode 997490
dc.personcode 996928
dc.percentage 100 en_US Plant Biology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Hydraulic conductance
dc.description.keywords Narrow-leaved apple
dc.description.keywords Scribbly gum
dc.description.keywords Soil moisture
dc.description.keywords Transpiration
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
pubs.organisational-group /University of Technology Sydney/Strength - C3
utslib.copyright.status Open Access 2015-04-15 12:23:47.074767+10
pubs.consider-herdc true
utslib.collection.history General (ID: 2)
utslib.collection.history School of the Environment (ID: 344)

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