Search for dissertations about: "Jan-Eric Mattsson"
Found 3 swedish dissertations containing the words Jan-Eric Mattsson.
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1. Phylogenetic Studies in Usnea (Parmeliaceae) and Allied Genera
Abstract : This thesis deals with the phylogeny of the lichen genus Usnea (Parmeliaceae, Ascomycetes). The relationships and the morphological variation among Usnea species has been studied, as well as the relationship of Usnea to allied genera. Two species, U. florida and U. READ MORE
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2. Studies on spatial and temporal distributions of epiphytic lichens
Abstract : Lichens are an important group of organisms in terms of environmental issues, conservation biology and biodiversity, principally due to their sensitivity to changes in their environment. Therefore it is important that we develop our understanding of the factors that affect lichen distribution. READ MORE
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3. Phylogenetic and taxonomic studies within Arthonia Ach. (Ascomycetes, Arthoniales)
Abstract : The taxonomy and phylogeny of the genus Arthonia was analysed. As a first step, a phylogenetic analysis was performed to test the monophyly of some of the infrageneric groups suggested by earlier authors. The results strongly support that Arthonia, Arthothelium and Arthoniaceae are paraphyletic. READ MORE