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1	Avspeglas rödrävspopulationen på rådjurspopulationen? : En analys av tre landskap i Sverige / Does the red fox population reflects on the roe deer populations? : An analysis of three regions in Sweden Kalling, Therese January 2020 (has links) Osämja mellan människan och rovdjuren har funnits sedan vi slutade jaga och började bruka jorden och bedriva lantbruk. En av de absolut viktigaste faktorerna som bestämmer vart en art förekommer, hur stark en stam är och hur den förändras över tiden, är predation. I svensk historia har både rådjurs (Capreolus capreolus) och rödräven (Vulpes vulpes) båda populationer varit nära nationell utrotning. Syftet med uppsatsen är att ta reda på om räven har någon påverkan på rådjurspopulationen. Detta görs genom att analysera avskjutningsstatistik från viltdata.nu i tre olika län med liknande klimat och innehåller samma arter av predatorer. Analysen gjordes med korrelationsanalys. Dock var det inget utav resultaten som visade någon signifikans. Dessa olika resultat i de olika län tyder på att det finns andra faktorer än räven som påverkar rådjurspopulationen. / A conflict between humans and predators has existed since man stopped hunting and started with agriculture instead. We know today that one of the most important factors influencing the distribution and abundance of a species is predation. Over the last two? centuries, both the roe deer (Capreolus capreolus) population and the red fox (Vulpes vulpes) population have been very close to extinction in Sweden. The purpose of this study was to determine if the red fox population affects the roe deer population. This was done by analyzing hunting statistics from viltdata.nu in three different regions with similar climate and with the same type of carnivores. The analysis was performed using correlation analysis. None of the relationships between roe deer and the fox in the three different areas was significant. This indicates that there are factors other than predation by fox that influence the deer population. rödräv rådjur omnivor herbivor predation Zoology Zoologi Ecology Ekologi
2	Kan herbivorer begränsa fröetablering av fjällbjörk, tall, gran och sibirisk lärk i norra Fennoskandien? Wahlberg, Sonja January 2009 (has links) No description available. fröetablering herbivor fjällbjörk tall gran sibirisk lärk Fennoskandien Terrestrial ecology Terrestrisk ekologi
3	Kan herbivorer begränsa fröetablering av fjällbjörk, tall, gran och sibirisk lärk i norra Fennoskandien? Wahlberg, Sonja January 2009 (has links) No description available. fröetablering herbivor fjällbjörk tall gran sibirisk lärk Fennoskandien Terrestrial ecology Terrestrisk ekologi
4	Vliv biotických interakcí na populační biologii lučních rostlin / The role of biotic interactions in population biology of meadow plants Janovský, Zdeněk January 2015 (has links) In present thesis, I treat the topic of impacts of plant-animal interactions, namely herbivory and pollination, on plant life cycle and lifetime fitness. First, I identify the components of the impact of plant-animal interactions: i) interaction frequency; ii) per-interaction effect; iii) sensitivity of the plant's life cycle to the changes in vital rate impacted by the animals. Furthermore, I also classify other causes changing the outcome of a plant-animal interaction into two categories: i) plant's traits; ii) plant's environment. A review of extant literature on the topic revealed that especially the role of plant's environment in changing the outcome of plant-animal interactions is largely understudied and I attempt to reduce this gap in knowledge in the five detailed studies encompassed in this thesis. The detailed studies focus on a model system of Central European wet grasslands and especially on three species typical to it: Succisa pratensis, Achillea millefolium and A. ptarmica. The first two studies examine the effects of environment on frequency of plant- animal interactions. The next two studies are more integrative, one focusing on the impacts of different herbivore groups on the complete life cycle and the other on interaction of herbivory and pollination on plant lifetime fitness....
5	Tritrophic interactions between Populus tremula, leaf beetles and their natural enemies - from the field to the laboratory / Tritrophische Interaktionen zwischen Populus tremula, Blattkäfern und ihren natürlichen Feinden - vom Freiland ins Labor von Fragstein und Niemsdorff, Paul-Albin Maximilian 13 September 2011 (has links) No description available. 570 Biowissenschaften Biologie Tritrophische Interaktionen Populus tremula Blattkäfer Chrysomela Phratora Räuber Harmonia axyridis Eumeninae Symmorphus Salicylaldehyd Herbivor induzierte Pflanzen Volatilen Tritrophic interactions Populus tremula leaf beetle Chrysomela Phratora Predators Harmonia axyridis Eumeninae Symmorphus Salicylaldehyde herbivore-induced plant volatiles 42.97 42.75 WN 000: Ökologie {Biologie}

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