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Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia

Prior, Lynda Dorothy, Bowman, David M. J. S. and Eamus, Derek (2005). Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia. Australian Journal of Botany,53(4):323-335.

Document type: Journal Article
Citation counts: Scopus Citation Count Cited 16 times in Scopus Article | Citations

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IRMA ID A00004xPUB97
Title Intra-specific variation in leaf attributes of four savanna tree species across a rainfall gradient in tropical Australia
Author Prior, Lynda Dorothy
Bowman, David M. J. S.
Eamus, Derek
Journal Name Australian Journal of Botany
Publication Date 2005
Volume Number 53
Issue Number 4
ISSN 0067-1924   (check CDU catalogue open catalogue search in new window)
Scopus ID 2-s2.0-23444432483
Start Page 323
End Page 335
Total Pages 13
Publisher Commonwealth Scientific and Industrial Research Organization
Field of Research 0607 - Plant Biology
HERDC Category C1 - Journal Article (DEST)
Abstract Leaf attributes of four savanna tree species were measured along a rainfall gradient (1650-950mm per annum) in the Australian monsoon tropics. As the mean annual rainfall decreased, leaf thickness increased for three of these four species. However, a corresponding decrease in leaf density for two species meant that leaf mass per area increased significantly only for one species. Physiological measurements were made during both the wet and dry seasons on comparable stands of vegetation near the extremes and middle of this gradient. Assimilation per unit mass was similar at all three sites but assimilation per leaf area was higher at the drier sites because leaves were thicker with higher mass per area. These results probably reflect reduced tree density and leaf area index at the drier sites, which offsets the lower rainfall, potentially allowing similar rates of assimilation per unit carbohydrate invested in leaves.
Keywords carbon-isotope discrimination
northern australia
stomatal conductance
monsoon tropics
water-use
territory
patterns
plant
growth
mass
DOI http://dx.doi.org/10.1071/BT04080   (check subscription with CDU E-Gateway service for CDU Staff and Students  check subscription with CDU E-Gateway in new window)
 
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