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Showing result 1 - 5 of 88 swedish dissertations matching the above criteria.
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1. Community Robustness Analysis : Theoretical Approaches to Identifying Keystone Structures in Ecological Communities
Abstract : Most of the world’s ecosystems suffer from stress caused by human activities such as habitat destruction, fragmentation, overexploitation of species and climate change. These factors affect the reproduction and/or survival of individual species as well as interactions between species in ecological communities. READ MORE
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2. Plant community assembly in grazed grasslands
Abstract : Species assembly into local communities from the surrounding region can be caused either by species failure to reach the site (i.e. seed limitation) or to establish (i.e. READ MORE
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3. A developmental perspective on psychopathic traits in adolescence
Abstract : More than half of known crime is committed by 5-6% of the criminal population. Who are these people? Research has shown that it is likely that a majority of these individuals are characterized by having a psychopathic personality. Interestingly, research has shown that psychopathic features are not unique to adults. READ MORE
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4. Antisocial behavior in adolescence : the role of individual characteristics
Abstract : The main aim of this dissertation is to investigate whether traits on the level of the individual are important in understanding violent, frequent antisocial behavior among adolescents. The first of the four studies included in this dissertation asks whether individual-level explanations are going to be a fruitful approach at all. READ MORE
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5. Consequences of bushmeat hunting in tropical forests
Abstract : This thesis evaluates the effect of bushmeat hunting in southeastern Nigerian rainforests on: 1) adult tree, seedling, and animal community compositions 2) germination and survival among seedlings in association with competition 3) changes in community composition at multiple trophic levels 4) leaf nitrogen concentration (LNC), leaf mass per area (LMA) and stem specific density (SSD) 5) on human reliance on forest resources and rural people use forest resources. Data for the first four evaluations were obtained from surveys, manipulative experiments in seedling plots and collected leaf samples in three pairs of sites with high (hunted sites) and low (protected sites) hunting pressure but with similar adult tree composition. READ MORE