Search for dissertations about: "Population distribution"
Showing result 16 - 20 of 753 swedish dissertations containing the words Population distribution.
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16. Ethnic heterogeneity of the North-Swedish population : its origin and medical consequences
Abstract : Northern Sweden shows a unique population structure with remarkable geographical variations in the distribution of genetic disorders as well as genetic markers like blood groups, serum groups and red cell enzyme types. The present-day population of northern Sweden is a mixture of people of Finnish, Saamish (Lappish) and Central-Swedish origin. READ MORE
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17. Population Dynamics and Conservation of the Sand Lizard (Lacerta agilis) on the Edge of its Range
Abstract : The sand lizard (Lacerta agilis) reaches the northern periphery of its distribution in south-central Sweden, where small, isolated relict populations occur in pine heath forests on sandy sediments. Modern forestry and fire suppression have reduced the amount of suitable open habitat for the species in this area and seem to be important for its decline. READ MORE
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18. 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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19. Population processes in heterogeneous landscapes
Abstract : Population processes in heterogeneous landscapes are notoriously difficult to study, both empirically and theoretically. There are well-documented effects of scale (both total size and resolution of the system), density dependence, temporal and spatial variation, as well as effects of habitat-shape, -boundary and -edge. READ MORE
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20. Ecology and Conservation of the Baltic Proper Harbour Porpoise
Abstract : The Baltic Proper harbour porpoise (Phocoena phocoena) population is listed by IUCN as Critically Endangered, but conservation action has been lacking for decades, partly due to very limited knowledge on important ecological parameters such as distribution range and abundance. This thesis provides some of the information needed for implementing effective conservation. READ MORE