Aspen Bibliography

Stomatal conductance in a northern temperate deciduous forest: temporal and spatial patterns

Document Type

Article

Journal/Book Title/Conference

Canadian Journal of Forest Research

Volume

23

Issue

2

First Page

245

Last Page

252

Publication Date

1993

Abstract

Stomatal conductance measurements were obtained in the summer of 1989 in a deciduous forest near Chalk River, Ontario. Seasonal changes in stomatal conductance of trembling aspen (Populustremuloides Michx.) and white birch (Betulapapyrifera Marsh.) were related to changes in soil water content. Rehydration of water stores in trees following each of the two major rain events observed over the growing season likely influenced the magnitude of stomatal conductance. Diurnal changes in stomatal conductance were found to be related primarily to changes in solar radiation, vapour-pressure deficit, and air temperature. There was considerable vertical variation in stomatal conductance, such that the canopy could be divided into a total of five layers. There was also considerable variation in stomatal conductance trees.

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