Publication
Title
Tree leaf wettability as passive bio-indicator of urban habitat quality
Author
Abstract
This study evaluated the effect of urban habitat quality on the wettability of tree leaves. We measured leaf wettability of five common tree species, i.e., Alnus glutinosa, Acer pseudoplatanus, Betula pendula, Quercus robur and Sambucus nigra, in semi-natural and industrial urban habitats in the city of Gent (Belgium). Possible seasonal variation was taken into account by measuring in late spring and in late summer. Drop contact angle (DCA), and height over width ratio were measured on the abaxial and the adaxial leaf surface as proxies for leaf wettability. The relative standard deviation for the height over width ratio was higher than for the DCA, so that only the latter was considered further. Habitat type significantly influenced leaf wettability: the DCA values of Q. robur leaves were significantly lower in the industrial than in the semi-natural areas, in both June and September while, for S. nigra, the DCA was in both sampling events significantly higher in the industrial areas. For the adaxial leaf side, the differences between the considered habitats were more pronounced in June than in September. The adaxial DCA of A. pseudoplatanus was significantly higher in June compared to September, while the opposite held for abaxial values of A. glutinosa. We conclude that leaf wettability is potentially a good indicator to point out differences in urban habitat quality, but selection of the most sensitive tree species and the appropriate time of measuring is an important prerequisite.
Language
English
Source (journal)
Environmental and experimental botany. - Oxford, 1976, currens
Publication
Oxford : 2012
ISSN
0098-8472
Volume/pages
75(2012), p. 277-285
ISI
000298940600034
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 23.11.2011
Last edited 16.11.2017
To cite this reference