title: Leaf reflectance variation along a vertical crown gradient of two deciduous tree species in a Belgian industrial habitat.
abstract: The reflectometry of leaf asymmetry is a novel approach in the bio-monitoring of tree health in urban or industrial habitats. Leaf asymmetry responds to the degree of environmental pollution and reflects structural changes in a leaf due to environmental pollution. This paper describes the boundary conditions to scale up from leaf to canopy level reflectance, by describing the variability of adaxial and abaxial leaf reflectance, hence leaf asymmetry, along the crown height gradients of two tree species. Our findings open a research pathway towards bio-monitoring based on the airborne remote sensing of tree canopies and their leaf asymmetric properties.
authors.affiliation: Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium. Electronic address: a.r.khavaninzadeh@gmail.com.
authors.forename: Ali Reza
authors.initials: AR
authors.lastname: Khavaninzadeh
authors.affiliation: Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium. Electronic address: frank.veroustraete@uantwerpen.be.
authors.forename: Frank
authors.initials: F
authors.lastname: Veroustraete
authors.affiliation: Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium. Electronic address: shari.vanwittenberghe@uantwerpen.be.
authors.forename: Shari
authors.initials: S
authors.lastname: Van Wittenberghe
authors.affiliation: Image Processing Laboratory, University of Valencia, C/Catedrático José Beltrán 2, E-46980 Paterna, Valencia, Spain. Electronic address: jochem.verrelst@uv.es.
authors.forename: Jochem
authors.initials: J
authors.lastname: Verrelst
authors.affiliation: Department of Bioscience Engineering, Faculty of Sciences, University of Antwerp, Groenenborgerlaan 171, BE-2020 Antwerp, Belgium. Electronic address: roeland.samson@uantwerpen.be.
authors.forename: Roeland
authors.initials: R
authors.lastname: Samson
mesh_terms: D000397:Air Pollution; D001530:Belgium; D017753:Ecosystem; D004784:Environmental Monitoring / Q000379:methods*; D007221:Industry; D018515:Plant Leaves / Q000033:anatomy & histology*; D058998:Remote Sensing Technology; D014197:Trees / Q000033:anatomy & histology*
keywords: Bio-geophysics; Canopy height gradient; Ghent (Belgium); Industrial habitats; Leaf asymmetry; Leaf reflectometry