title: Lichens as indicators for air quality.
abstract: Indication depends on the existence of a known relationship between the possibilities for existence of the lichens and the quality of their surroundings. These possibilities may be read from the parameters such as: distribution patterns of species, species numbers, physiological and morphological aspects. This is illustrated by examples with emphasis on: choice of parameters, interaction between several factors, comparison of lichens with other organisms and evaluation of the use of lichens as indicators.
authors.affiliation: Research Institute for Nature Management, Leersum, The Netherlands.
authors.forename: T
authors.initials: T
authors.lastname: De Wit