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The phylogenetic diversity of Lecania fuscella does not reflect its evolutionary potential
Uppsala University, Disciplinary Domain of Science and Technology, Biology, Department of Evolution, Genomics and Systematics, Systematic Botany.
(English)Manuscript (Other (popular science, discussion, etc.))
URN: urn:nbn:se:uu:diva-96139OAI: oai:DiVA.org:uu-96139DiVA: diva2:170614
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2010-01-14Bibliographically approved
In thesis
1. Disentangling Lecania
Open this publication in new window or tab >>Disentangling Lecania
2007 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis focuses on phylogenetic, taxonomic, ecological, and conservation aspects of the crustose lichen genus Lecania (Ramalinaceae, lichenized Ascomycota). Lecania has previously been defined on basis of relatively few morphological characters, and the genus had never been treated in molecular phylogenies.

The molecular phylogeny of the genus is inferred from DNA sequences. Twenty-five species traditionally placed in Lecania are included in the study along with 21 species from closely related genera. Lecania is a polyphyletic genus. A well-supported monophyletic group containing 16 Lecania species, including the type species L. fuscella is discovered, i.e. Lecania s. str. Nine species formerly included in Lecania do not belong in the genus. A new species, L. belgica, is described.

The relationships of a group of morphologically similar Lecania species, i.e. the L. cyrtella group are investigated using morphological and molecular methods. Haplotype network and phylogenetic analyses indicate that the included species, as conceived in the morphological examinations, all are monophyletic. Two new species, L. leprosa and L. madida, are described, L. proteiformis is resurrected from synonymy, and the known range of L. prasinoides is greatly expanded.

The type species Lecania fuscella has become endangered in many countries. Twelve localities in Sweden where the species had been found historically are investigated, but L. fuscella is only recovered in one locality. The species composition in these 12 localities, 58 old and 5 new collections with L. fuscella is determined and analyzed. The vegetation community differs between the old and the new collections, and between the locality where the species is recovered and those where it is not. Lecania fuscella has not been able to adapt to environmental changes and now only appears in a specific type of vegetation community. The phylogenetic diversity of the species is calculated, but does not reflect the species’ evolutionary potential.

Place, publisher, year, edition, pages
Uppsala: Acta Universitatis Upsaliensis, 2007. 42 p.
Digital Comprehensive Summaries of Uppsala Dissertations from the Faculty of Science and Technology, ISSN 1651-6214 ; 333
Biology, Crustose lichens, Phylogeny, Taxonomy, Morphology, New species, Phylogenetic diversity, Rare species, ITS, mt-SSU, RPB2, IGS, Biologi, Lecania, Ramalinaceae
urn:nbn:se:uu:diva-8183 (URN)978-91-554-6953-5 (ISBN)
Public defence
2007-09-28, Lindahlsalen, EBC, Norbyvägen 18A, Uppsala, 09:00 (English)
Available from: 2007-09-05 Created: 2007-09-05 Last updated: 2009-04-02Bibliographically approved

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