Modeling of aquatic primary production and water monitoring

Modeling of aquatic primary production and water monitoring

Different phytoplankton groups acclimate to certain growth conditions with respect to their physiological features. Mechanisms to cope with high light, alternative electron pathways and biomass composition are of special interest. These physiological features, however, alter the metabolic fluxes within the cell (carbon allocation) as well as the energy partitioning (usage of absorbed energy within different pathways). To analyze the quantum efficiency of each subprocess a variety of methods have been established: e.g. O2/CO2 gas exchange, chlorophyll fluorescence measurements and Fourier transformed infra-red spectroscopy. Our setup is used to develop an overall view of energy fluxes within phytoplankton cells with respect to abiotic factors (light climate, nutrient concentration, temperature, pH).
Our recent results showed a high plasticity, but also species specific responses. These will be used for the interpretation of different growth strategies depending on the abiotic factors and therefore to model aquatic primary production as well as to optimize growth conditions in biotechnological applications.

contact: Dr. Heiko Wagner, Dr. Tosten Jakob

last modified: 19.11.2019