Search for dissertations about: "Ecotypes"

Showing result 1 - 5 of 23 swedish dissertations containing the word Ecotypes.

  2. 1. The evolution of flat periwinkles Littorina fabalis and L. obtusata emhasizing mitochondrial introgression and restricted recombination

    Author : Petri Kemppainen; Göteborgs universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Speciation; Local adaptations; Ecotypes; Mitochondrial DNA; Introgression; Restricted recombination; Positive selection; Inversions; Chromosomal rearrangements;

    Abstract : The evolution of species takes in general very long time and different mechanisms are likely to operate during the various stages of this process. Accordingly speciation should be studied at different levels of species divergence. READ MORE

  4. 2. Genetics and ecology of natural populations

    Author : Elisabeth Lundqvist; Ulf Lagercrantz; Umeå universitet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; Angelica archangelica; Bistorta vivipara; Viscaria alpina; Eiseniella tetraedra; ecotypes; hydrochory; genetic differentiation; clone diversity; genetic patterns; riparian;

    Abstract : I have studied the genetic variation of single species using morphological variation and enzyme electrophoresis. I have striven to understand the interaction between the breeding structure and the ecology of the species in relation to the community, in which it lives. The work was done in the county of Västerbotten, northern Sweden. READ MORE

  5. 3. Physiological adaptations in two ecotypes of Fucus vesiculosus and in Fucus radicans with focus on salinity

    Author : A Maria Gylle; Nils GA Ekelund; Stefan Falk; Pauli Snoeijs; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Bothnian Sea; brackish; brown algae; D1; 77 K fluorescence emission; Fucus vesiculosus; Fucus radicans; light-harvest antenna; mannitol; marine; NMR; Norwegian Sea; quantum yield; photosynthetic maximum capacity Pmax ; photosystem; PSI; PSII ; PsaA; Rubisco; salinity.; Biology; Biologi; Plant physiology; Växtfysiologi;

    Abstract : The in origin intertidal marine brown alga Fucus vesiculosus L. grow permanently sublittoral in the brackish Bothnian Sea, side by side with the recently discovered F. radicans L. Bergström et L. READ MORE

  6. 4. Intraspecific variation in Rhinanthus angustifolius. Local adaptation, phenotypic plasticity and geographical structure

    Author : Anneli Jonstrup; Biodiversitet; []
    Keywords : Ecotype; Local adaptation; Phenotypic plasticity; Parallel evolution; Geographical structure; Hemiparasite; Rhinanthus;

    Abstract : Plant species often adapt to local environmental conditions, which can result in the formation of genetically and phenotypically distinct ecotypes. Ecotypes can evolve rapidly, and may be a first step in the process of ecological speciation. READ MORE

  7. 5. Physiological responses of marine and brackish Fucus vesiculosus L. with respect to salinity

    Author : Maria Gylle; Mittuniversitetet; []
    Keywords : NATURVETENSKAP; NATURAL SCIENCES; acclimation; Bothnian Sea; compatible solutes; desiccation; fluorescence; F. vesiculosus; F. radicans; immunoblot; mannitol; photosynthesis; Rubisco; salinity; Algfysiologi; Biology; Biologi;

    Abstract : The intertidal brown alga Fucus vesiculosus L. is mainly a marine species (34 practical salinity units, psu), but the alga also grows in the sublittoral of the brackish Bothnian Sea (part of the Baltic Sea; 5 psu). READ MORE