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    Author(s): Johan Uddling; Ronald M. TeclawMark E. Kubiske; Kurt S. Pregitzer; David S. Ellsworth
    Date: 2008
    Source: Tree Physiology 28: 1231-1243.
    Publication Series: Scientific Journal (JRNL)
    Station: Northern Research Station
    PDF: Download Publication  (175.14 KB)


    Elevated concentrations of atmospheric carbon dioxide ([CO2]) and tropospheric ozone ([O3]) have the potential to affect tree physiology and structure and hence forest water use, which has implications for climate feedbacks. We investigated how a 40% increase above ambient values in [CO2] and [O3], alone and in combination, affect tree water use of pure aspen and mixed aspen?birch forests in the free air CO2-O3 enrichment experiment near Rhinelander, Wisconsin (Aspen FACE). Measurements of sap flux and canopy leaf area index (L) were made during two growing seasons, when steady-state L had been reached after more than 6 years of exposure to elevated [CO2] and [O3].

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    Uddling, Johan; Teclaw, Ronald M.; Kubiske, Mark E.; Pregitzer, Kurt S.; Ellsworth, David S. 2008. Sap flux in pure aspen and mixed aspen-birch forests exposed to elevated concentrations of carbon dioxide and ozone. Tree Physiology 28: 1231-1243.


    climate, FACE, leaf area index, soil water, transpiration, tree community

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