Leaf and canopy conductance in aspen and aspen-birch forests under free-air enrichment of carbon dioxide and ozone

Johan Uddling; Ronald M. Teclaw; Kurt S. Pregitzer; David S. Ellsworth

Treesearch

Leaf and canopy conductance in aspen and aspen-birch forests under free-air enrichment of carbon dioxide and ozone

Informally Refereed

Authors:

Johan Uddling, Ronald M. Teclaw, Kurt S. Pregitzer, David S. Ellsworth

Year:

2009

Type:

Scientific Journal

Station:

Northern Research Station

Source:

Tree physiology. 29: 1367-1380.

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Abstract

Increasing concentrations of atmospheric carbon dioxide (C0₂) and tropospheric ozone (0₃) have the potential to affect tree physiology and structure, and hence forest feedbacks on climate. Here, we investigated how elevated concentrations of CO₂ (+ 45%) and O₃ (+ 35%), alone and in combination, affected conductance for mass transfer at the leaf and canopy levels in pure aspen (Populus tremuloides Michx.) and in mixed aspen and birch (Betula papyrifera Marsh.) forests in the free-air CO₂-O₃ enrichment experiment near Rhinelander, Wisconsin (Aspen FACE).

Keywords

13C discrimination, FACE, photosynthesis, sap flow, stomata, tree community

Citation

Uddling, Johan; Teclaw, Ronald M.; Pregitzer, Kurt S.; Ellsworth, David S. 2009. Leaf and canopy conductance in aspen and aspen-birch forests under free-air enrichment of carbon dioxide and ozone