Search for dissertations about: "Phylogenetic uncertainty"

Found 3 swedish dissertations containing the words Phylogenetic uncertainty.

  1. 1. Stochastic Models in Phylogenetic Comparative Methods: Analytical Properties and Parameter Estimation

    Author : Krzysztof Bartoszek; Göteborgs universitet.; Gothenburg University.; [2013]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Adaptation; Adaptation; Birth-death process; Branching diffusion; Brownian motions; Conditioned branching process; Evolution; General Linear Model; Hybridization; Macroevolution; Measurement error; Multivariate phylogenetic comparative method; Optimality; Ornstein-Uhlenbeck process; Phyletic gradualism; Phylogenetic inertia; Phylogenetic uncertainty; Punctuated equilibrium; Yule tree;

    Abstract : Phylogenetic comparative methods are well established tools for using inter-species variation to analyse phenotypic evolution and adaptation. They are generally hampered, however, by predominantly univariate approaches and failure to include uncertainty and measurement error in the phylogeny as well as the measured traits. READ MORE

  2. 2. Buellia species with pluriseptate spores and the Physciaceae (Lecanorales, Ascomycotina) Taxonomic, phylogenetic and ultrastructural studies

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Anders Nordin; Uppsala universitet.; [2001]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Developmental biology; Buellia; Diplotomma; phylogenetic analysis; pluriseptate spores; Physciaceae; taxonomy; ultrastructure; Utvecklingsbiologi; NATURAL SCIENCES Biology Organism biology Developmental biology; NATURVETENSKAP Biologi Organismbiologi Utvecklingsbiologi; systematisk botanik; Systematic Botany;

    Abstract : This dissertation is primarily focused on the Buellia species with pluriseptate spores, often referred to the section or genus Diplotomma, and secondarily on the Physciaceae. An ultrastructural study at family level gives new information on spore characters. READ MORE

  3. 3. Phylogeny and Signal Diversity in Widowbirds and Bishops (Euplectes spp.)

    University dissertation from Uppsala : Acta Universitatis Upsaliensis

    Author : Maria Prager; Göteborgs universitet.; Gothenburg University.; [2010]
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ploceidae; weaverbirds; stochastic character mapping; phylogenetic uncertainty; mate choice; status signalling; sexual dichromatism; C4-oxygenation;

    Abstract : Although sexual selection for elaborate signals is well documented in numerous species, the extreme diversity in signal design and expression in many taxa is largely unexplained. This thesis explores phylogenetic, mechanistic and ontogenetic explanations for divergence in two classic condition-dependent signal traits in the African widowbirds and bishops (Euplectes spp. READ MORE