The main research topic of NR-P during the last 5 years has been the benthic marine nitrogen cycle, i.e. the microbiology and response of the processes nitrification, denitrification, anammox and nitrate ammonification to biological, physical and chemical parameters in sediments. State of the art microsensor techniques (e.g. biosensors for NO3- and NO2-, oxygen and sulphide and pH microsensor), stable isotopes (15N), and molecular techniques have been applied in combination to study a) interactions between benthic micro algae and N-cycle bacteria in estuarine sediments b) the diversity, spatial and seasonal variations in abundance and activity of bacteria responsible for the unique anaerobic oxidation of ammonium (Anammox) in natural sediments and c) the biology of large filamentous nitrate accumulating sulphur bacteria. Recently the research has been focused on the role of benthic foraminifers in the nitrogen cycle. This has led to the discovery of eukaryotic cells capable for denitrification. The work has been carried out in both artic and temperate environments.
Deense naam: Danmarks Miljøundersøgelser Overkoepelend instituut: University of Aarhus (AU), meer
Dale, A. W.; Regnier, P.; Van Cappellen, P.; Fossing, H.; Jensen, J. B.; Jørgensen, B. B. (2009). Remote quantification of methane fluxes in gassy marine sediments through seismic survey. Geology (Boulder Colo.) 37(3): 235-238. dx.doi.org/10.1130/G25323A.1, meer
Dale, A. W.; Aguilera, D. R.; Regnier, P.; Fossing, H.; Knab, N. J.; Jørgensen, B. B. (2008). Seasonal dynamics of the depth and rate of anaerobic oxidation of methane in Aarhus Bay (Denmark) sediments. J. Mar. Res. 66(1): 127-155. dx.doi.org/10.1357/002224008784815775, meer
BlueReef: Rebuilding of Marine Cavernous Boulder Reefs in Kattegag, meer
CARBOOCEAN: Marine carbon sources and sinks assessment, meer
Dale, A. W.; Regnier, P.; Van Cappellen, P.; Fossing, H.; Jensen, J. B.; Jørgensen, B. B. (2009). Remote quantification of methane fluxes in gassy marine sediments through seismic survey. Geology (Boulder Colo.) 37(3): 235-238.