Dr. Emil Rydin, Uppsala University, Sweden

Seminar Abstract: The Baltic Sea has been increasingly eutrophicated over the last century. Organic phosphorus accumulated in the sediment forms a primary source of phosphate to the water column. The potential of different analytical methods (³¹P NMR and mass spectroscopy) on identifying organic phosphorus compounds in sediment extracts will be highlighted. The importance of identifying different organic P forms in both external sources and in the sediment is discussed. What organic phosphorus forms are characteristic from different catchments, and what share of these phosphorus forms are degradable and will support future production? This is key information needed for cost effective decision-making on actions to be taken in the catchment area, and/or for internal measures to reduce eutrophication of the Baltic Sea.

Research Interests: Emil Rydins research interests involve factors that regulate trophic status in aquatic systems. Especially mobilization as well as immobilization of phosphorus in sediment draws his attention.

Host: Dr. Kathleen Weathers