Search for dissertations about: "adaptive morphology"
Showing result 21 - 25 of 37 swedish dissertations containing the words adaptive morphology.
-
21. The diapause switch : Evolution of alternative developmental pathways in a butterfly
Abstract : Diapause decision is a classic example of a threshold switch mechanism with cascading effects on morphology, behaviour and life-history traits. This thesis addresses the downstream effects of the insect diapause switch, with the main focus on pathway-specific regulation of life-history traits, using the speckled wood butterfly (Pararge aegeria) as a study species. READ MORE
-
22. Genetic Adaptation and Speciation in Darwin’s Finches and Atlantic Herring
Abstract : Natural selection acts on existing genetic variation to drive genetic adaptation of organisms to various ecological niches. Interaction between closely related populations, through processes such as competition and hybridization, may either lead to their divergence or population fusion, which has consequences for adaptation and the formation of species. READ MORE
-
23. Genetic variation and phenotypic plasticity in body traits of nestling blue tits
Abstract : This thesis examines genetic and environmental contributions to variation in body traits in a population of free-living blue tits. It also investigates possible consequences for the evolution of body size. READ MORE
-
24. Fuel and fly: adaptations to endurance exercise in migrating birds
Abstract : Birds on migration alternate between consuming fuel stores during flights and accumulating fuel stores during stopovers. This thesis highlights some of the ways in which migrating birds have adapted to the different demands of fuelling and flight. Most of the time on migration is spent at stopover sites accumulating fuel stores. READ MORE
-
25. Functional and structural characterizations of phytoplankton-bacteria interactions in response to environmental challenges
Abstract : Microorganisms, such as phytoplankton and bacteria, make up ≈70% of aquatic biomass and contribute 50-85% of the oxygen in Earth’s atmosphere. The microbial loop concept and the discovery of the large diversity in microbial communities acknowledge that biotic interactions between microorganisms in addition to resource competition enable the recycling of energy and nutrients in aquatic food webs. READ MORE