PATTERN-RECOGNITION IN LICHENS FOR SOURCE APPORTIONMENT

Monte-Carlo-assisted factor analysis has been applied to a lichen data set, obtained from a monitoring survey on a national scale in The Net herlands for source apportionment purposes. The factor analysis as app lied revealed 10 factors, of which 8 could be interpreted in terms of realistic sources of pollution. Geographical distribution patterns of the factor values were used to facilitate and to support the identific ation of the associated sources.