Sökning: "Sebastian Diehl"
Visar resultat 1 - 5 av 8 avhandlingar innehållade orden Sebastian Diehl.
1. 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
2. Species Responses to Environmental Fluctuations : impacts of food web interactions and noise color
Sammanfattning : Species constantly experience changes in their environmental conditions owing to natural or human induces reasons. Understanding how species respond to these fluctuations are important for ecology, especially given the ongoing climate change. Empirical studies have shown that species respond differently to the same disturbance. LÄS MER
3. Biotic resistance in freshwater fish communities
Sammanfattning : Invasions of non-native species cause problems in ecosystems worldwide, and despite the extensive effort that has been put into research about invasions, we still lack a good understanding for why some, but not other, communities resist these invasions. In this doctoral thesis I test hypotheses on biotic resistance using a large dataset of more than 1000 both failed and successful introductions of freshwater fish into Swedish lakes. LÄS MER
4. Combining limnology and paleolimnology : a refined understanding of environmental sediment signal formation in a varved lake
Sammanfattning : Paleoclimatic archives, such as lake sediments, extend our understanding of terrestrial and aquatic ecosystem dynamics in relation to climate variability beyond the period covered by instrumental data. In this context, annually laminated (i.e. LÄS MER
5. Biomass patterns in boreal-subarctic lake food webs along gradients of light and nutrients
Sammanfattning : There is large natural variation in light and nutrient conditions across lakes. In the boreal-subarctic region most lakes are small, shallow and nutrient poor. In such lakes there is often sufficient light to support primary production at the lake bottom. LÄS MER