Sökning: "Ecology"
Visar resultat 21 - 25 av 1824 avhandlingar innehållade ordet Ecology.
21. Ecology of nematophagous fungi in agricultural soils
Sammanfattning : Nematophagous fungi possess various mechanisms for infecting nematodes, and are either obligate parasites or facultative saprophytes. Nematophagous fungi have a potential as biological control agents against plant- and animal-parasitic nematodes. LÄS MER
22. Ecology and Evolution of Adaptive Morphological Variation in Fish Populations
Sammanfattning : The work in this thesis deals with the ecology and evolution of adaptive individual variation. Ecologists have long used niche theory to describe the ecology of a species as a whole, treating conspecific individuals as ecological equivalent. LÄS MER
23. Predators in low arctic tundra and their impact on community structure and dynamics
Sammanfattning : The abundance of predators and their impact on ecosystem dynamics is a vividly discussed topic in current ecology. In my studies, incorporating field observations, field experiments and theoretical modeling, I explored the importance of predators and predation in a low arctic tundra ecosystem in northern Norway. LÄS MER
24. Spatial heterogeneity and biotic interactions : scaling from experiments to natural systems
Sammanfattning : Much of current ecological theory stems from experimental studies. These studies have often been conducted in closed systems, at spatial scales that are much smaller than the systems of interest. LÄS MER
25. Benthic diatoms in the Gulf of Bothnia : Community analysis and diversity
Sammanfattning : Benthic diatoms are valuable tools for biological monitoring and paleo-ecological reconstruction of past environmental conditions. This thesis aims at describing size-related properties of benthic diatoms and suggests that data assessment for community analysis can be improved by considering the importance of scale. LÄS MER