Sökning: "trofiska interaktioner"
Hittade 5 uppsatser innehållade orden trofiska interaktioner.
1. Behavioural effects on Lymnaea stagnalis following sublethal exposure to the antidepressant fluoxetine
Master-uppsats, Lunds universitet/Miljövetenskaplig utbildningSammanfattning : The use of selective serotonin reuptake inhibitors (SSRI), a group of antidepressants, increases globally resulting in higher concentrations also in wastewater recipients. These concentrations may cause altered behaviour of aquatic organisms and have effects on whole ecosystem level. LÄS MER
2. Gymnasieelevers kunskap om trofiska interaktioner
Uppsats för yrkesexamina på grundnivå, Linnéuniversitetet/Institutionen för didaktik och lärares praktik (DLP)Sammanfattning : Syftet med denna studie var att ta reda på hur elever på naturvetarprogrammet formulerar sin förståelse av trofiska interaktioner efter att ha avslutat ekologimomentet i gymnasiets kurs Biologi 1. Jag genomförde kvalitativa intervjuer med tolv elever på en gymnasieskola i Kalmar län. LÄS MER
3. Importance of fish community structure, nutrients and browning for shallow lake ecosystem dynamics : A modelling perspective
Master-uppsats, Uppsala universitet/Institutionen för biologisk grundutbildningSammanfattning : In a changing climate, it is increasingly important to be able to model environmental effects on food webs, and to do that, one must have appropriate dynamic models. I present a shallow lake ecosystem model where producers, grazers, carnivores, piscivores, and detritivores are coupled through resource (light, nutrients and detritus) fluxes between the benthic and pelagic habitats and through carnivore life history events (ontogenetic habitat and diet shifts). LÄS MER
4. The influence of northern pike on the diet of Eurasian perch
Kandidat-uppsats, Umeå universitet/Institutionen för ekologi, miljö och geovetenskapSammanfattning : Top predators in aquatic ecosystems often have strong top-down effects on the ecosystem. Northern pike (Esox lucius) has been documented to cause whitefish (Coregonus lavaretus) populations to diverge into different ecomorphs. LÄS MER
5. Biotiska faktorers inverkan på markstrukturen
Kandidat-uppsats, SLU/Dept. of Soil and EnvironmentSammanfattning : Soil structure is a key factor in the functioning of soil, including its ability to support root growth. Soil structure influences the circulation of nutrients and affects the gas exchange, and acts as habitat for the soil organisms. LÄS MER