Search for dissertations about: "flower production"
Showing result 1 - 5 of 17 swedish dissertations containing the words flower production.
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1. Pheromone production in the butterfly Pieris napi L
Abstract : Aphrodisiac and anti-aphrodisiac pheromone production and composition in the green-veined white butterfly Pieris napi L. were investigated.Aphrodisiac pheromone biosynthesis had different time constraints in butterflies from the diapausing and directly developing generations. READ MORE
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2. Population Differentiation in Solidago virgaurea along Altitudinal Gradients
Abstract : Altitudinal gradients offer attractive opportunities for studies of population differentiation in response to environmental heterogeneity. In this thesis, I examined population differentiation along altitudinal gradients by combining common-garden experiments with field studies and experiments in alpine, subalpine and boreal populations of the perennial herb Solidago virgaurea. READ MORE
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3. To Bee or Not to Be : Critical Floral Resources of Wild-Bees
Abstract : In recent decades, the development of strategies to prevent or slow the loss of biodiversity has become an important task for ecologists. In most terrestrial ecosystems wild-bees play a key role as pollinators of herbs, shrubs and trees. The scope of this thesis was to study 1) pollinator effectiveness of specialist bees vs. READ MORE
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4. Plant-seed predator interactions – ecological and evolutionary aspects
Abstract : Plant-animal interactions are affected by both abundance and distribution of interacting species and the community context in which they occur. However, the relative importance of these factors is poorly known. READ MORE
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5. Attract, reward and disrupt: combining habitat manipulation and semiochemicals to enhance pest control in apple orchards
Abstract : Agricultural intensification entails negative effects on natural enemy populations and the pest regulation services they provide. Habitat manipulation holds potential to control pests with less negative effects on the environment than conventional methods. READ MORE