The use of pre-dawn leaf water potential and MODIS LAI to explore seasonal trends in the phenology of Australian and southern African woodlands and savannas

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dc.contributor.author Palmer, AR
dc.contributor.author Fuentes, S
dc.contributor.author Taylor, D
dc.contributor.author MacInnis-Ng, C
dc.contributor.author Zeppel, M
dc.contributor.author Yunusa, I
dc.contributor.author February, E
dc.contributor.author Eamus, D
dc.date.accessioned 2010-05-28T09:44:27Z
dc.date.issued 2008
dc.identifier.citation Australian Journal of Botany, 2008, 56 (7), pp. 557 - 563
dc.identifier.issn 0067-1924
dc.identifier.other C1 en_US
dc.identifier.uri http://hdl.handle.net/10453/8618
dc.description.abstract Trends in global soil moisture are needed to inform models of soil-plant-atmosphere interactions. Predawn leaf water potential (Ψpd), a surrogate for soil moisture and an index of plant water stress, has been routinely collected in Australian forests, woodlands and savannas, but the associated leaf area index (LAI) has seldom been available to enable the preparation of a Ψpd on LAI relationship. Following an analysis of Ψpd and MODIS LAI data from Australian forests, woodlands and savannas, we identified patterns in Ψpd which provide an understanding of the role of soil-moisture status in controlling LAI. In the savanna of northern Australia, the MODIS LAI product had a basal value of 0.96 during the dry season as compared with a mean value of 2.5 for the wet season. The dry season value is equivalent to the LAI of the tree component and corresponds with ground-truthed LAI. Ψpd is lowest (more negative) during the height of the dry season (late October) at -2.5MPa, and highest (-0.1MPa) during the wet season (early March). We present two models which predict Ψpd from the MODIS LAI product. These may be useful surrogates for studying trends in soil moisture in highly seasonal climates and may contribute to climate change research. © CSIRO 2008.
dc.language eng
dc.relation.hasversion Accepted manuscript version en_US
dc.relation.isbasedon 10.1071/BT08079
dc.subject Plant Biology & Botany
dc.subject Plant Biology & Botany
dc.title The use of pre-dawn leaf water potential and MODIS LAI to explore seasonal trends in the phenology of Australian and southern African woodlands and savannas
dc.type Journal Article
dc.parent Australian Journal of Botany
dc.journal.volume 7
dc.journal.volume 56
dc.journal.number 7 en_US
dc.publocation Collingwood VIC, Australia en_US
dc.identifier.startpage 557 en_US
dc.identifier.endpage 563 en_US
dc.cauo.name SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0607 Plant Biology
dc.personcode 995490 en_US
dc.personcode 997490 en_US
dc.personcode 040345 en_US
dc.personcode 980151 en_US
dc.personcode 034078 en_US
dc.personcode 030005 en_US
dc.personcode 0000046698 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 en_US
dc.staffid 000006 en_US
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/Faculty of Science/School of the Environment
pubs.organisational-group /University of Technology Sydney/Strength - C3


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