Search for dissertations about: "Gymnadenia"
Found 4 swedish dissertations containing the word Gymnadenia.
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1. Population genetic analyses in the orchid genus Gymnadenia : a conservation genetic perspective
Abstract : Small populations are facing a particular risk of extinction due to a lack of appropriate genetic diversity and associated negative effects, factors dealt with in the discipline of conservation genetics. Many orchid species exhibit characteristics that make them a perfect study object in the scope of conservation genetics. READ MORE
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2. Evolutionary Ecology of Floral Traits in Fragrant Orchids
Abstract : Why are flowers so diverse? Much of floral evolution is thought to be driven by pollinator-mediated selection. However, the connection between macroevolutionary patterns of floral diversity and microevolutionary processes remains poorly understood. In this thesis, I have used the fragrant orchids Gymnadenia conopsea s.s. READ MORE
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3. Population size, viability and genetic diversity in the orchid Gymnadenia conopsea
Abstract : In this thesis, I combined controlled crosses with genetic and demographic data to examine how a main conservation value indicator, population size, was associated with estimates of population viability. I focused on the still common, but decreasing, perennial orchid Gymnadenia conopsea at two spatial scales—locally on the island Öland, in SE Sweden, and regionally across Scandinavia. READ MORE
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4. Biotic and abiotic drivers of life-history and demographic variation in boreal orchids
Abstract : Environmental interactions, including both abiotic and biotic factors, are key drivers of life-history and population dynamics. Despite this, most population studies do not explicitly link variation in environmental factors and vital rates. READ MORE