Search for dissertations about: "vertebrate"
Showing result 21 - 25 of 198 swedish dissertations containing the word vertebrate.
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21. Herbivory and plant community structure in a subarctic altitudinal gradient
Abstract : The object of this thesis was to study plant community structure, especially in relation to vertebrate herbivory, in an altitudinal gradient in the Fennoscandian mountain chain.A sowing experiment in a high alpine Ranunculus glacialis population showed that seeds germinated better in cleared microsites than under established individuals. READ MORE
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22. Top-down and bottom-up effects in a Fennoscandian tundra community
Abstract : The objective of this thesis was to investigate the effects of mammalian grazers, such as microtine rodents and reindeer, (top-down effects) and nutrient availability (bottom- up effects) on the plant community of a tundra heath.I conducted a large-scale fertilization experiment and studied the impact of grazers using exclosures. READ MORE
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23. Costs in the ecology and evolution of the vertebrate immune system
Abstract : A central assumption of theories of the ecology and evolution of immunological defence is that defence has not only benefits (in the form of resistance against parasites), but also costs. The aim of my studies was to investigate the nature and magnitude of costs of the vertebrate immune system, and to examine some of the consequences of these costs. READ MORE
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24. Vertebrate remains from the Upper Silurian-Lower Devonian of North Greenland
Abstract : .... READ MORE
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25. Two conformationally distinct regions in the large subunits of vertebrate ribosomes
Abstract : .... READ MORE