Sökning: "Gulf of Bothnia"

Visar resultat 21 - 25 av 29 avhandlingar innehållade orden Gulf of Bothnia.

1. 21. Metapopulations dynamics and sex-specific resource allocation in Silene dioica

   Författare :Elisabet Peedu; Pär Ingvarsson; Barbara Giles; Umeå universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Silene dioica; Skeppvik Archipelago; Metapopulation Dynamics; Population Genetic Structuring; Genetic Diversity; Gene Flow; Sex-Specific Resource Allocation; Cost of Reproduction; Life-History Theory; Sexual Dimorphism; Reproductive Effort; biology; biologi; evolutionär genetik; evolutionary genetics; ekologisk botanik; Ecological Botany;

   Sammanfattning : Rising archipelagos provide unique settings for the study of the temporal and spatial dynamics of their biota. This offers the possibility to study the ecology and genetics of early successional processes; both between islands that differ in age and within islands when already established organisms have to keep pace with the changing environment. LÄS MER

3. 22. Sälen och Jägaren : De bottniska jägarnas begreppssystem för säl ur ett kognitivt perspektiv

   Författare :Ann-Catrine Edlund; Jan Nilsson; Nils Storå; Kerstin Norén; Umeå universitet; []
   Nyckelord :HUMANIORA; HUMANITIES; Scandinavian languages; Swedish dialects; cognitive semantics; cognitive anthropology; conceptual system; cultural model; knowledge system; categorization of seals; seal hunting; Swedish language; Svenska språket; Scandinavian Languages; nordiska språk;

   Sammanfattning : In the North Scandinavian area of investigation, which is in focus in this dissertation, seal-hunting has been an important means of livelihood from prehistoric times up to the present. The Swedish-speaking seal-hunters' conceptual system for seal during the 20th century is analysed here. LÄS MER

4. 23. Natural resources and institutional performance : linking social and ecological systems in fisheries

   Författare :Carl Rova; Luleå tekniska universitet; []
   Nyckelord :SAMHÄLLSVETENSKAP; SOCIAL SCIENCES; Political Science; Statsvetenskap;

   Sammanfattning : In times of resource scarcity, the management system should be able to adjust, thus enabling it to respond and reorganise when changes in the ecosystem occur. For a successful resource management, ecological resilience must be combined with institutional resilience. LÄS MER

5. 24. Diversity and phylogeography in Alisma (Alismataceae), with emphasis on Northern European taxa

   Författare :Anders Jacobson; Biologiska institutionen; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; morphology; phytogeography; chemotaxonomy. Physiology of nonvascular plants; taxonomy; Systematic botany; Baltic Sea; Europe; refugia; post-glacial migration; phylogeography; marsh plants; genetic variation; aquatic plants; Alisma; Systematisk botanik; taxonomi; morfologi; kemotaxonomi. Växters fysiologi inte kärlväxter .;

   Sammanfattning : In the present thesis the phylogeny and patterns of genetic diversity of the plant genus Alisma (Alismataceae) were investigated by means of genetic markers (RAPDs, allozymes, and ITS and trnL sequences). Additionally, morphological studies were carried out in paper IV. LÄS MER

7. 25. Hydroxylated polybrominat­ed diphenyl ethers in Baltic Sea biota : Natural production, food web distribution and biotransformation

   Författare :Dennis Lindqvist; Lillemor Asplund; Walter Vetter; Stockholms universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; OH-PBDEs; Baltic Sea; Biosynthesis; Environmental fate; Wildlife exposure; Metabolism; Analytical methods; Ceramium tenuicorne; Blue mussel; Gammarus spp.; Stickleback; Perch; Grey Seal; miljökemi; Environmental Chemistry;

   Sammanfattning : Hydroxylated polybrominated diphenyl ethers (OH-PBDEs) are naturally produced in aquatic ecosystems e.g. by algae. Many OH-PBDEs have been observed to be highly bioactive and to cause adverse effects through several pathways, e. LÄS MER