Comparison of lichen presence rough/smoother pavement

Comparison of lichen presence rough/smoother pavement

Observation - Comparison of lichen presence rough/smoother pavement - UK and Ireland. Description: A grey crustose lichen species is present on the pavement. The paving is smoother on the right, away from the road, and the rougher on the left. The lichen seems to be more present on the rougher paving closer to the road.

A grey crustose lichen species is present on the pavement. The paving is smoother on the right, away from the road, and the rougher on the left. The lichen seems to be more present on the rougher paving closer to the road.