A lichenological field meeting has been held near the village of Soest. The changes of the lichen composition during the last five years are discussed, e.g. a recent settlement of Parmelia pastillifera. An increase of the number of epiphytic lichens has been observed, particularly at nutrient enriched sites, e.g. in built-up areas, near bark wounds, at dusty places, and on horizontal branches. Several observations indicate that the return of epiphytes sensitive to SO2 is nearly absent at stations where such an enrichment with nutrients does not occur.