Search for dissertations about: "host plant"
Showing result 1 - 5 of 158 swedish dissertations containing the words host plant.
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1. Plant polyploidy and interactions with insect herbivores
Abstract : Polyploidization has been suggested to be a common mechanism for plant speciation. Polyploidy is associated with changes in plant traits and altered habitat preference. READ MORE
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2. Ecology and evolution in a host-parasitoid system : Host search, immune responses and parasitoid virulence
Abstract : In host-parasitoid systems, there is a continuous coevolutionary arms race where each species imposes a strong selection pressure on the other. The host needs to develop defence strategies in order to escape parasitism and the parasitoid must evolve counter-defence strategies in order to overcome the host’s immune defence and successfully reproduce. READ MORE
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3. Evolutionary and mechanistic aspects of insect host plant preference
Abstract : Plant feeding insects comprise about 25% of all animal species on earth and play an important role in all ecosystems. Although we understand that their association with plants is a key-factor driving the diversification in this group, we still have large gaps in our knowledge of the underlying processes of this relationship. READ MORE
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4. Context dependency of plant – animal interactions
Abstract : The strength and direction of interactions between organisms vary spatially across the landscape. Traditionally, the focus has been on how trait variation affects the interactions between species. However, differences in abiotic and biotic environmental factors may also alter the distribution, phenology and behavior of the interacting species. READ MORE
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5. 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