- Gilbert O.L.
- 22(1): 87-101
The lichen colonization of recently created urban wasteland is described
by reference to 40 sites in England, Scotland and Wales. The 100 species encountered
form a series of overlapping communities in which successional relationships
over the first 16 years have been investigated. Floristic variation within towns tends to
be greater than variation between them. On a national scale climatological, geological
and historical factors appear to play only a small part in determining the composition
of this pioneering flora. Many species can be accommodated within the strategy
group stress-tolerant ruderals; a few possess the character of ruderals. The heyday of
this component of the urban flora may be drawing to a close. Acarospora heppii f.
luteopruinosa, Lecidea polycarpella and Micarea excipulata are reported as new to
- Wednesday, 15 November 2017 08:59