Lichen wars

Lichen wars

Observation - Lichen wars - UK and Ireland. Description: Three species of lichen 'fighting' for space. Pic shows the black border on the frontier between each one and there are clear differences in the fruiting bodies. If anyone can help with the i/d of any of these it would be good, but I put the pic up jus

Three species of lichen 'fighting' for space. Pic shows the black border on the frontier between each one and there are clear differences in the fruiting bodies.

If anyone can help with the i/d of any of these it would be good, but I put the pic up just to show the principle. I am not sure what the black lines actually are - chemical barriers I would guess.