Journal
ECOLOGY AND EVOLUTION
Volume 5, Issue 6, Pages 1263-1270Publisher
WILEY
DOI: 10.1002/ece3.1344
Keywords
Climatic moisture; leaf area; pipe model; plant hydraulics; sapwood area; tree morphology
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Funding
- TERN
- iMQRES/Macquarie University
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The leaf area-to-sapwood area ratio (LA:SA) is a key plant trait that links photosynthesis to transpiration. The pipe model theory states that the sapwood cross-sectional area of a stem or branch at any point should scale isometrically with the area of leaves distal to that point. Optimization theory further suggests that LA:SA should decrease toward drier climates. Although acclimation of LA:SA to climate has been reported within species, much less is known about the scaling of this trait with climate among species. We compiled LA:SA measurements from 184 species of Australian evergreen angiosperm trees. The pipe model was broadly confirmed, based on measurements on branches and trunks of trees from one to 27years old. Despite considerable scatter in LA:SA among species, quantile regression showed strong (0.2
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