Search for dissertations about: "metapopulation"
Showing result 26 - 30 of 31 swedish dissertations containing the word metapopulation.
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26. Butterfly Diversity and Dispersal in Fragmented Grasslands
Abstract : During the last decades, the distribution and abundance of many European species of birds, plants and insects in agricultural landscapes have declined due to agricultural intensification. To be able to mitigate these declines, it is essential to know the relative importance on local and regional ecological processes on population persistence and patterns of species richness. READ MORE
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27. Island biogeography of young land uplift islands - viewed through the lens of bryophytes in a northern Swedish archipelago
Abstract : Increasing habitat fragmentation and rapid global warming is changing the conditions for species populations and ecological communities around the world. This presents challenges for the maintenance of biodiversity and a dominant paradigm for conservation in fragmented habitats is given by island biogeography and metapopulation (or metacommunity) ecology. READ MORE
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28. Genetic variation and sexual reproduction in a moss with dwarf males, Homalothecium lutescens
Abstract : Dwarf males occur in many unrelated groups of organisms. Among land plants they are unique to mosses. Moss dwarf males originate from male spores that land and germinate on the female where their final size is restricted to a few mm. Fertilization in mosses occur over short distances with swimming spermatozoids. READ MORE
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29. Population genetic patterns in continuous environments in relation to conservation management
Abstract : Genetic variation is a prerequisite for the viability and evolution of species. Information on population genetic patterns on spatial and temporal scales is therefore important for effective management and for protection of biodiversity. READ MORE
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30. Ecology and conservation of the butterfly Lopinga achine
Abstract : The ecology of the red-listed butterfly Lopinga achine was studied in partly open woodlands in the province of Östergotland, Sweden. Detailed autoecological research is essential for successful conservation of a species, and the present investigation focused on the initial aspects of such work, namely, choice of host plant, habitat selection, and dispersal ability. READ MORE