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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.
©#StefanFWirth
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Lichen Parmelia sulcata on a branch nearby lake Flughafenseen in forest Jungfernheide Berlin. The species prefers moisture and cleaner air, but is flexible and can also appear as pioneer lichen under less perfect conditions. © Stefan F. Wirth, Berlin, March 2026
Lichen Hypotrachyna afrorevoluta on a branch nearby lake Flughafenseen in forest Jungfernheide Berlin. The species prefers warmth, clean air and some slight acidity. It is sometimes named as putative sister species of the morphologically rather similar Hypotrachyna revoluta. They differ by their thallus surface texture (rough in H. afrorevoluta) and the thallus lobe endings lesser bulged downward in H. revoluta and stronger bulged downward in H. afrorevoluta. Soridia are more granular in the latter, its rhizinia are black and stiff and not brown, slim and wavy. H. afrorevoluta was described from specimens in Africa, since the ends of 1990s the species was also discovered in Europe, formerly mistaken with H. revoluta. It is seemingly in debate, whether it is really the same species as in tropical Eastern Africa (Kenya). © Stefan F. Wirth, Berlin, March 202
#Germany #berlin #forest #photos #globalwarming #species #stefanfwirth #jungfernheide #parmelia #sulcata #hypotrachyna #afrorevoluta #environments #treetrunks #branches
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