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Moving water well: comparing hydraulic efficiency in twigs and trunks of coniferous, ring-porous, and diffuse-porous saplings from temperate and tropical forests

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dc.creator McCulloh, K. A.
dc.creator Sperry, J. S.
dc.creator Lachenbruch, B.
dc.creator Meinzer, F. C.
dc.creator Reich, P. B.
dc.creator Voelker, S.
dc.date.accessioned 2010-08-03T22:00:23Z
dc.date.available 2010-08-03T22:00:23Z
dc.date.issued 2010
dc.identifier.citation McCulloh, K. A., J. S. Sperry, B. Lachenbruch, F. C. Meinzer and P. B. Reich. 2010. Moving water well: comparing hydraulic efficiency in twigs and trunks of coniferous, ring-porous, and diffuse-porous saplings from temperate and tropical forests. New Phytologist 186: 439-450. en
dc.identifier.uri http://hdl.handle.net/1957/17305
dc.description The definitive version of this article is available at www.newphytologist.com. en
dc.description.abstract • Coniferous, diffuse-porous and ring-porous trees vary in their xylem anatomy, but the functional consequences of these differences are not well understood from the scale of the conduit to the individual. • Hydraulic and anatomical measurements were made on branches and trunks from 16 species from temperate and tropical areas, representing all three wood types. Scaling of stem conductivity (Kh) with stem diameter was used to model the hydraulic conductance of the stem network. • Ring-porous trees showed the steepest increase in Kh with stem size. Temperate diffuse-porous trees were at the opposite extreme, and conifers and tropical diffuse- porous species were intermediate. Scaling of Kh was influenced by differences in the allometry of conduit diameter (taper) and packing (number per wood area) with stem size. • The Kh trends were mirrored by the modeled stem-network conductances. Ringporous species had the greatest network conductance and this value increased isometrically with trunk basal area, indicating that conductance per unit sapwood was independent of tree size. Conductances were lowest and most size-dependent in conifers. The results indicate that differences in conduit taper and packing between functional types propagate to the network level and have an important influence on metabolic scaling concepts. en
dc.language.iso en_US en
dc.publisher Wiley-Blackwell en
dc.subject conduit frequency en
dc.subject hydraulic architecture en
dc.subject sapling en
dc.subject tracheid en
dc.subject vessel en
dc.subject network efficiency en
dc.title Moving water well: comparing hydraulic efficiency in twigs and trunks of coniferous, ring-porous, and diffuse-porous saplings from temperate and tropical forests en
dc.type Article en


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