Niels O G Jørgensen Associate Professor, PhD Genetics and
Microbiology Group Department of Agriculture & Ecology University of
Copenhagen Thorvaldsensvej 40 DK-1871
Frederiksberg Denmark e-mail nogj@life.ku.dk
Research interests My research interests focus on biology of
microorganisms in aquatic environments. In a current project,
microorganisms producing the off-taste compounds geosmin and MIB
are studied in aquacultures and drinking water reservoires. In other ongoing projects, basic
aspects of microbial cycling of dissolved
nitrogen compounds that are naturally occurring, such as
amino acids, proteins, purines and urea,
is examined. A special organic nitrogen compound is peptidoglycan from bacterial
cell walls. Aspects of degradation of peptidoglycan by aquatic microorganisms from different environments is also being examined.
In addition, some preliminary work on aquatic fungi has been
performed.
Jorgensen NOG, Brandt KK, Nybroe O &
Hansen M (2009) Delftia
lacustris sp. nov., a peptidoglycan-degrading
bacterium from freshwater and emended description of D. tsuruhatensis as a
peptidoglycan-degrading bacterium. International Journal of Systematic
and Evolutionary Microbiology (in press).
Frette L, Jørgensen NOG, Nybroe O, del
Giorgio PA & Kroer N (2009). Effect of availability of nitrogen compounds
on community structure of aquatic bacteria in model systems. Microbial Ecology 57: 104-116
Jørgensen NOG &
Stepanauskas R (2009). Biomass of pelagic fungi in Baltic rivers. Hydrobiologia 623:
105-112
Drillet G, Jepsen PM, Højgaard JK,
Jørgensen NOG & Hansen BW (2008) Strain-specific vital rates in four
Acartia tonsa cultures II: Life history traits and biochemical
contents of eggs and adults. Aquaculture 279: 47-54
Jørgensen NOG, Engel P, Jellison R &
Hollibaugh JT (2008). Contribution of bacterial cell wall components to DOM in
alkaline, hypersaline Mono Lake, California. Geomicrobiology Journal 25: 38-55
Bertilsson S, Eiler A, Nordquist A &
Jørgensen NOG (2007). Links between bacterial production, amino-acid
utilization and community composition in productive lakes. The ISME Journal 1: 532-544
Jørgensen NOG & Middelboe M (2006)
Occurrence and bacterial cycling of D amino acid isomers in an estuarine
environment. Biogeochemistry 81:77-94
Drillet G, Jørgensen NOG, Sørensen TF,
Ramløv H & Hansen BW (2006) Biochemical and technical observations
supporting the use of copepods as live feed organisms in marine larviculture.
Aquaculture Research 37: 756-772
Biology of
microorganisms producing the off-tastes geosmin and MIB in
aquacultures