Search for dissertations about: "Geum"
Found 3 swedish dissertations containing the word Geum.
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1. The evolutionary history of Geum (Rosaceae, Colurieae) : a study of ancient allopolyploid speciation
Abstract : Allopolyploid speciation plays an important role in flowering plant evolution. Its contribution to diversity has been suggested to be significant in Geum. READ MORE
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2. Evolution of seed attributes, dispersal and population dynamics of plants,with special emphasis on fragmented habitats
Abstract : Theory predicts that life history traits that reduce the impact of environmental variation will exhibit a pattern of negative covariation (trade-offs). In plants, such traits are seed size, spatial seed dispersal and seed dormancy which interact to reduce risk in a variable environment. READ MORE
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3. Plant colonization of oak plantations - the interactive effects of local environment and land-use history
Abstract : In Europe, only small fragments of deciduous woodlands remain intact and species dependent on this ecosystem have declined. In southern Sweden, a shifting trend during the 20th century, with more afforestations on former arable land, resulted in new oak stands. These new stand are either on former arable fields or on continuously forested land. READ MORE