title: Transpiration and canopy conductance in an inner alpine Scots pine (Pinus sylvestrisL.) forest.
abstract: Canopy transpiration (Ec) of a 150-year oldPinus sylvestrisL. stand in an inner alpine dry valley, Tyrol, Austria was estimated throughout two growing seasons 2011 and 2012 by means of xylem sap flow measurements. Although there were prolonged periods of limited soil water availabilityEcdid not show a clear trend with respect to soil water availability and averaged 0.4 ± 0.19 mm day-1under conditions of non-limiting soil water availability and 0.37 ± 0.17 mm day-1when soil water availability was limited. This is because canopy conductance declined significantly with increasing evaporative demand and thus significantly reduced tree water loss. The growing season total ofEcwas 74 mm and 88 mm in 2011 and 2012, respectively, which is significantly below the values estimated for otherP. sylvestrisforest ecosystems in Central Europe, and thus reflecting a strong adaptation to soil drought during periods of high evaporative.
authors.affiliation: Department of Alpine Timberline Ecophysiology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Rennweg 1, A-6020 Innsbruck, Austria.
authors.forename: Gerhard
authors.initials: G
authors.lastname: Wieser
authors.affiliation: Department of Alpine Timberline Ecophysiology, Federal Research and Training Centre for Forests, Natural Hazards and Landscape (BFW), Rennweg 1, A-6020 Innsbruck, Austria.
authors.forename: Marco
authors.initials: M
authors.lastname: Leo
authors.affiliation: Institute of Botany, Leopold-Franzens-Universität Innsbruck, Sternwartestraße 15, A-6020 Innsbruck, Austria.
authors.forename: Walter
authors.initials: W
authors.lastname: Oberhuber