Dr. Hanna Farnelid’s Network
Hanna Farnelid, Researcher
My research interests are within aquatic microbial ecology with a focus on microbial diversity and functionality. I study phytoplankton and bacteria interactions with a focus on processes such as carbon and nitrogen fixation. In my research I use traditional microbial methods such as cultivation in combination with in situ studies and molecular methods. I am particularly interested in genetic microdiversity within microbial lineages and their consequences for ecosystem functioning.
Keywords: diversity, interactions, picoplankton, nitrogen fixation, nifH
Themes: 1, 2 and 3.
My research focuses on the seasonal and spatial dynamics of picophytoplankton (phytoplankton smaller than 2µm). This group has been understudied in the Baltic Sea. However, there is evidence that suggests that they have an important role in the ecosystem. In the four years of my Ph.D studies I will investigate how picophytoplankton respond to the environmental conditions, how they relate to the rest of the ecosystem and what is their ecological role. This information can not only increase the knowledge about the marine ecosystems today, but also help us predict how the climate change could change the Baltic Sea ecosystems.
Keywords: picocyanobacteria, seasonal dynamics, primary production, Baltic Sea; climate change.
In my PhD I mainly work with outdoor pilot scale systems of local microalgal polycultures to evaluate their potential to reduce eutrophication effects by recovery of nutrients from various wastewater streams (leachate- and dairy water etc.). I also study how biotic and abiotic factors affect the seasonal succession of the microalgal communities and the production of algal biomass metabolites (carbohydrates, proteins and lipids). My research will contribute to developing biological solutions for sustainable coastal management of the Baltic Sea region in terms of eutrophication, climate change and food/feed production.
Key words: microalgae, nutrient recovery, sustainability, seasonal dynamics, algal biomass.
I’m working with phytoplankton and bacteria associations and interactions, both in culture and in field studies. This is interesting because these microbes are very abundant and they are shaping ecosystem functions, such as providing larger organisms with essential nutrients through recycling. I want to find out how these organisms are responding to changes around them, be it by the functions of surrounding organisms or environmental factors, such as light and temperature. This is important, not only for predictions in a changing environment, but also for knowing how resilient microbial communites are.
Key words: Interactions, associations, phytoplankton, bacteria, Baltic Sea.