Sökning: "Population Distribution"

Visar resultat 16 - 20 av 787 avhandlingar innehållade orden Population Distribution.

1. 16. Dietary Intake, Fatty Acid Biomarkers, and Abdominal Obesity : Population-Based Observational Studies

   Författare :Zayed Alsharari; Ulf Risérus; Matti Marklund; Per Sjögren; Tommy Cederholm; Emily Sonestedt; Uppsala universitet; []
   Nyckelord :abdominal obesity; fatty acid biomarker; dietary intake; Kostvetenskap; Food; Nutrition and Dietetics;

   Sammanfattning : The aim of this thesis was to investigate the associations between fatty acid (FA) biomarkers, carbohydrate intake, and abdominal obesity (AO) and related anthropometric measures in a population-based cohort of men and women in Stockholm County. The overall hypothesis was that dietary fat quality assessed by serum and adipose tissue FA composition, and dietary intake of especially carbohydrates is associated with AO. LÄS MER

3. 17. Ethnic heterogeneity of the North-Swedish population : its origin and medical consequences

   Författare :Per-Olof Nylander; Umeå universitet; []
   Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Ethnic heterogeneity; Northern Sweden; Population genetics; Finns; Saamis; Genetic markers; Hypercholesterolemia;

   Sammanfattning : 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. LÄS MER

4. 18. Population Dynamics and Conservation of the Sand Lizard (Lacerta agilis) on the Edge of its Range

   Författare :Sven-Åke Berglind; Pekka Pamilo; Per Sjögren-Gulve; Coulson Tim; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Ecology; demography; extinction; habitat; Lacerta agilis; management; metapopulation; peripheral populations; population dynamics; population viability analysis; reintroduction; reptiles; umbrella species; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Sammanfattning : 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. LÄS MER

5. 19. Population biology of the clonal plant Ranunculus lingua

   Författare :Mats E. Johansson; Christer Nilsson; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; clonal fragmentation; emergent macrophytes; fungal pathogens; hydrochoiy; invertebrate grazing; marginal population; Peronospora gigantea Prasocuris phellandrt regional abundance; rhizome production; size-number trade-off; vegetative reproduction; water-level fluctuation;

   Sammanfattning : 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. LÄS MER

7. 20. Population processes in heterogeneous landscapes

   Författare :Lars Westerberg; William Fagan; Linköpings universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES;

   Sammanfattning : 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. LÄS MER