Search for dissertations about: "marginal populations"
Showing result 1 - 5 of 37 swedish dissertations containing the words marginal populations.
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1. Evolutionary ecology of arctic char (Salvelinus alpinus (L.)) : Intra- and interspecific interactions in circumpolar populations
Abstract : This thesis examines a suite of ecological and genetic mechanisms influencing the fundamental and realized niche borders of European and North American populations of the Arctic char (Salvelinus alpinus (L.)) species complex in allopatry as well as in sympatry with brown trout (Salmo trutta) or brook trout (Salvelinus fontinalis). READ MORE
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2. Genetic structure and dispersal in plant populations
Abstract : This thesis focuses on the spatial structure and methods to identify spatial structure in plants. Methods that investigate genetic structure can mainly be divided into equilibrium methods that reveal summed dispersal over many generations, and cluster methods, that reveal more recent dispersal events. READ MORE
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3. Population biology of the clonal plant Ranunculus lingua
Abstract : The scope of this thesis was to identify, describe and quantify important life-history traits for the pseudoannual aquatic plant Ranunculus lingua in different ecological settings, by comparing populations from geographically marginal vs. central habitats. READ MORE
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4. The spatial structure of genetic and morphometric variation in Corylus avellana (Betulaceae): pattern and scale
Abstract : In the present thesis, I investigated the spatial structure of genetic and morphometric variation in the widespread wind-pollinated shrub Corylus avellana (L.) Betulaceae, hazel, and related the variation to geographic distribution and different spatial scales. READ MORE
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5. Periodontal health and disease in two adult populations in Sweden
Abstract : This thesis deals with epidemiological data regarding periodontaldisease from two different Swedish populations (Jönköping andSkåne).BackgroundThe studies focus on periodontal disease, a disease affecting a largepart of the adult population. READ MORE