Figure 11From: Long-term monitoring of environmental change in German towns through the use of lichens as biological indicators: comparison between the surveys of 1970, 1980, 1985, 1995, 2005 and 2010 in Wetzlar and Giessen Temporal development of toxitolerant and strongly acidophytic lichen species L. conizaeoides and hypertrophication-indicating Xanthoria parietina. Back to article page