Systematics, biodiversity and ecology of lichens

This volume focuses on the interaction of lichens with their
substrate, environment and their biogeographic effects.
In seventeen chapters thirty-eight authors present recent fi ndings
and developments in systematics, biodiversity, fl oristic studies
and ecology, as well as newly described taxa, and keys to the
identifi cation of Caloplaca and xanthorioid lichens. Molecular
phylogenetic analyses of several groups and genera are presented,
resulting in an improved systematics of, for example, Caloplaca,
Cladonia, Collema and xanthorioid lichens. The genera Arthonia and
Usnea in Greece (with key) are reviewed.
The volume is dedicated to Prof. Hans Martin Jahns on the occasion
of his 70th birthday, featuring papers on some of his favourite fi elds
of research, among them lichen interactions with their substrate
and environment and lichen biogeography. A brief biography of
Jahns, highlighting his contributions to lichenology, is included in the
chapter on the nine Presidents of the International Association for
Lichenology. Jahns played an important role during the seventies
and eighties with his highly infl uential book, co-authored by Aino
Henssen, entitled Lichenes. Eine Einführung in die Flechtenkunde.
He is well-known for his extensive work and numerous publications
on lichen morphology and ontogeny, particularly the development of
fruiting bodies in different genera.