Everyone,
here is an excellent reference to lichens as linchpin organisms in our environment.
Klaus, Can you possibly take macro pictures of your lichen, some time, so we can learn something of the structure.
Today I learned that lichens are neither plant no animal but a community of algae supported on a structure made by fungus!
Fascinating!
[We humans are constructed similarly with energy releasing simplified bacteria, (our mitochondria), living in the organized structure of each of our own trillions of cells!]
Asher