Retreating lichens in southernmost Sweden.
- Volkmar Wirth
- Botanical collections
air pollution. 41 species have disappeared, 16 species are considered endangered, 11 species are considered vulnerable, 7 species have become rare and 7 other species are care-demanding.
Three species are increasing in frequency. Maps of past and present distributions are presented for Bacidia rosella, Fellhanera bouteillei, Gyalecta ulmi, Lecanactis amylacea, Opegrapba vermicellifera, Parmelia revoluta, Phlyctis agelaea, Pyrenula nitida, Ramalina obtusata and Sticta fuliginosa.