Search for dissertations about: "Agneta Andersson"

Showing result 21 - 25 of 30 swedish dissertations containing the words Agneta Andersson.

2. 21. Environmental factors selecting for predation resistant and potentially pathogenic bacteria in aquatic environments

   Author : Peter Mathisen; Agneta Andersson; Johanna Thelaus; Mats Forsman; Anders Sjöstedt; Tron Frede Thingstad; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Eutrophication; productivity; predation pressure; predation-resistant bacteria; pathogens; Francisella tularensis; adaptation; biomarker; oligotyping;

   Abstract : The long history of co-existence of bacteria and their protozoan predators in aquatic environments has led to evolution of protozoa resistant bacteria (PRB). Many of these bacteria are also pathogenic to humans. READ MORE

4. 22. Molecular evidence for metazooplankton feeding on filamentous cyanobacteria and picocyanobacteria in the Baltic Sea

   Author : Nisha Motwani; Elena Gorokhova; Agneta Andersson; Jakob Walve; Karolina Ininbergs; Stockholms universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; marin ekologi; Marine Ecology;

   Abstract : Interactions between zooplankton and cyanobacteria are complex and system-specific. They play an important role in mediating responses of phytoplankton to changes in nutrient regime and top-down manipulations. READ MORE

5. 23. Phytoplankton drivers in a marine system influenced by allochthonous organic matter – the Baltic Sea

   Author : Joanna Paczkowska; Agneta Andersson; Owen Rowe; Harri Kuosa; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; phytoplankton; nutrients; allochthonous organic matter; humic substances; structuring factors;

   Abstract : Climate change scenarios predict that seawater temperature and precipitation will increase in the Baltic Sea region during the next century. In the northern part of the Baltic Sea, increasing inflows of the terrestrial allochthonous dissolved organic matter (ADOM) are expected to be a major consequence of elevated rainfall, which can alter light and nutrient availability for phytoplankton. READ MORE

6. 24. Mechanisms structuring the pelagic microbial food web : Importance of resource and predation

   Author : Kristina Samuelsson; Agneta Andersson; Christiane Lancelot; Umeå universitet; []
   Keywords : NATURVETENSKAP; NATURAL SCIENCES; Ecology; pelagic microbial food web; bacteria; flagellates; ciliates; phytoplankton; mixotrophy; nutrient status; predation limitation; resource limitation; Baltic Sea; Ekologi; Terrestrial; freshwater and marine ecology; Terrestisk; limnisk och marin ekologi;

   Abstract : Temporal and spatial variations of pelagic microorganisms in the northern Baltic Sea were studied, as well as factors influencing their abundance and growth rates. Three main questions were asked 1) How does increased productivity influence the structure of the microbial food web? 2) Does predation limitation vary between trophic levels? 3) What is the relative importance of resource and predation limitation at different trophic levels?A field study in the northern Baltic Sea showed that dominating protozoa, flagellates and ciliates, increased with increasing primary productivity from north to south. READ MORE

7. 25. Consuming and Communicating Fruit and Vegetables : A Nation-Wide Food Survey and Analysis of Blogs among Swedish Adults

   Author : Anna-Mari Simunaniemi; Margaretha Nydahl; Agneta Andersson; Helena Sandberg; Liisa Valsta; Uppsala universitet; []
   Keywords : fruit and vegetables; 24-h recall; food frequency questionnaire; discourse analysis; cluster analysis; communication; blogs; Culinary Arts and Meal Science; Måltidskunskap; Kostvetenskap; Food; Nutrition and Dietetics;

   Abstract : The aim of this thesis was to investigate fruit and vegetable (F&V) consumption among Swedish adults and to use F&V-related perceptions for audience segmentation. Further, the aim was to identify motives and approaches of F&V bloggers, as well as to analyze F&V-related online discourses. READ MORE