Convergence in hydraulic architecture, water relations and primary productivity amongst habitats and across seasons in Sydney

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Journal Article
Functional Plant Biology, 2004, 31 (5), pp. 429 - 439
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Convergence in leaf traits across biomes demonstrates generality in plant functioning. Relationships between hydraulic architecture and photosynthesis are less well studied. We investigated convergence in minimum leaf water potential (?min), conductivity per sapwood area (ks), Huber value (Hv) and xylem embolism and photosynthesis of several plant species in four habitats (heathland, woodland (ridge-top), woodland (below ridge) and mangrove) across two seasons (summer and winter) in the Sydney region, New South Wales, Australia. The studied species were: Banksia oblongifolia, Angophora hispida and Persoonia lanceolata (heathland); Eucalyptus haemastoma, Angophora hispida and B. oblongifolia (woodland, ridge-top); B. integrifolia, Cissus hypoglauca and Glochidion ferdinandi (woodland, below ridge); and Avicennia marina and Aegiceras corniculatum (mangrove). Seasonality strongly influenced all parameters in all habitats. Winter ?min values were lower than those for summer in the heathland and both woodland habitats, but summer ?min values were lower than those for winter in the mangrove. Summer ks values were higher than winter values in all habitats, while Hv was higher in winter than summer for all habitats.
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