I am interested in aquatic biogeochemistry and in particular the link between terrestrial, limnic and marine systems. Much of my research revolves around terrestrial export of organic matter and iron to surface waters - what is controlling that export, and what the consequences are to the recieving system.
A recurrent theme in my research is brownification or browning, which is referring to the fact that surface waters of the Northern Hemisphere are getting increasingly browner as a result of higher concentrations of dissolved organic matter and iron.
A second research theme is bacterial transformations of dissolved organic carbon (to carbon dioxide or bacterial biomass) and how that is regulated by factors such as temperature, inorganic nutrients, the origin and molecular structure of the organic matter, and the structure of the bacterial community.
Within my research I overlap the fields of biogeochemistry, microbiology, analytical chemistry and bacterial community structure/diversity. Morever, my study systems include soils, lakes, streams, rivers brackish and marine environments.
Retrieved from Lund University's publications database
- Effects of wastewater treatment plant effluent inputs on planktonic metabolic rates and microbial community composition in the Baltic Sea
- Increasing concentrations of iron in surface waters as a consequence of reducing conditions in the catchment area
- Reactivity of dissolved organic matter in response to acid deposition
- Dissolved Organic Nitrogen Inputs from Wastewater Treatment Plant Effluents Increase Responses of Planktonic Metabolic Rates to Warming.
- Experimental insights into the importance of aquatic bacterial community composition to the degradation of dissolved organic matter.
- Mass and UV-visible spectral fingerprints of dissolved organic matter : Sources and reactivity
- Phylogeography of the freshwater raphidophyte Gonyostomum semen confirms a recent expansion in northern Europe by a single haplotype
- pH Tolerance in Freshwater Bacterioplankton: Trait-Variation of the Community measured by Leucine Incorporation.
- Importance of boreal rivers in providing iron to marine waters.
- Labile organic carbon in river runoff: the importance of carbon sources and water residence times
- Seasonal contribution of terrestrial organic matter and biological oxygen demand to the Baltic Sea from three contrasting river catchments
- Warming and browning of lakes: consequences for pelagic carbon metabolism and sediment delivery
- Genetic diversity within and genetic differentiation between blooms of a microalgal species.
- Importance of space and the local environment for linking local and regional abundances of microbes
- Increasing iron concentrations in surface waters - a factor behind brownification?
- Predicted warming and browning affect timing and magnitude of plankton phenological events in lakes: a mesocosm study
- Tipping Elements in the Arctic Marine Ecosystem
- Changes in Arctic marine bacterial carbon metabolism in response to increasing temperature
- Regional invariance among microbial communities
- Temperature and phosphorus regulating carbon flux through bacteria in a coastal marine system
- The interplay between bacterial community composition and the environment determining function of inland water bacteria
- Bacterial growth on allochthonous carbon in humic and nutrient-enriched lakes: Results from whole-lake C-13 addition experiments
- Influence of dissolved organic matter source on lake bacterioplankton structure and function - implications for seasonal dynamics of community composition
- Stimulation of metazooplankton by photochemically modified dissolved organic matter
- Allochthonous and autochthonous carbon sources of lake bacterioplankton
- Does autochthonous primary production drive variability in bacterial metabolism and growth efficiency in lakes dominated by terrestrial C inputs?
- Ecosystem subsidies: Terrestrial support of aquatic food webs from C-13 addition to contrasting lakes
- Net heterotrophy in Faroe Islands clear-water lakes: causes and consequences for bacterioplankton and phytoplankton
Doctoral students and postdocs
PhD students, main supervisor
PhD students, assistant supervisor
- Johanna Sjöstedt
- Raquel Vaquer Sunyer (Geology)