title: Stored water use and transpiration in Scots pine: a modeling analysis with ANAFORE.
abstract: We estimated daily use of stored water by Scots pine (Pinus sylvestris L.) trees growing in a temperate climate with the ANAFORE model (ANAlysis of FORest Ecosystems) and compared the simulation results with sap flow measurements. The original model was expanded with a dynamic water flow and storage model that simulates sap flow dynamics in an individual tree. ANAFORE was able to accurately simulate diurnal patterns of measured sap flow under microclimatic conditions that differ from those of the calibration period. Strong relationships were found between stored water use and several tree characteristics (diameter at breast height, sapwood area, leaf area), but not with tree height. Relative to transpiration, stored water use varied over time (between < 1% and 44% of daily transpiration). On days when transpiration was high, trees were more dependent on stored water, indicating that the contribution of internal water to transpiration is not a constant in the water budget of trees.
authors.affiliation: Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610 Antwerp, Belgium. hans.verbeeck@ua.ac.be
authors.forename: Hans
authors.initials: H
authors.lastname: Verbeeck
authors.forename: Kathy
authors.initials: K
authors.lastname: Steppe
authors.forename: Nadja
authors.initials: N
authors.lastname: Nadezhdina
authors.forename: Maarten
authors.initials: M
authors.lastname: Op de Beeck
authors.forename: Gaby
authors.initials: G
authors.lastname: Deckmyn
authors.forename: Linda
authors.initials: L
authors.lastname: Meiresonne
authors.forename: Raoul
authors.initials: R
authors.lastname: Lemeur
authors.forename: Jan
authors.initials: J
authors.lastname: Cermák
authors.forename: Reinhart
authors.initials: R
authors.lastname: Ceulemans
authors.forename: Ivan A
authors.initials: IA
authors.lastname: Janssens
mesh_terms: D001692:Biological Transport / Q000502:physiology; D008954:Models, Biological; D041605:Pinus sylvestris / Q000378:metabolism / Q000502:physiology*; D018526:Plant Transpiration / Q000502:physiology*; D014867:Water / Q000378:metabolism*
chemical_list: D014867:Water