Lichens indicate airquality and climateconditions. I found the #species below in #Jungfernheide #forest #Berlin. While #Parmelia #sulcata requires light, but is flexible, #Hypotrachyna #afrorevoluta needs warm, nitrogen-poor #environments and clean air. The latter is rareer in #Germany, but spreading eastward based on #globalwarming. D. Masson (2004) found it on #treetrunks and #branches.
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Ref
https://sciencepress.mnhn.fr/sites/default/files/articles/pdf/cryptogamie-mycologie2004v25f3a6.pdf

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