N losses and nutrient regeneration in oxygen minimum zone waters

Oxygen minimum zones (OMZ) play a crucial role in regulating the availability of nutrient nitrogen (N) and are important sources of the climate relevant trace gas nitrous oxide (N2O) in the oceans. This project aims to investigate the effects of oxygen (O2) concentration on nutrient regeneration, N-loss, N2O-production and N2-fixation in OMZ waters. Rates of N-cycling processes are determined at in situ conditions as well at various controlled O2-concentrations, and the microorganisms involved are identified using molecular biological techniques. The results enhance our understanding of the impact of low O2 conditions and potential future changes on the Ocean's nutrient inventory.



Prof. Ruth Schmitz-Streit                  Prof. Marcel Kuypers                        PD Dr. Hermann Bange
Tel.: +49 431 880 4334                     Tel.: +49 421 2028 647                     Tel.: +49 431 600 4204
rschmitz(a)                  mkuypers(a)             hbange(a)