IThe productivity of lake plankton is largely regulated by substrates but the resulting biological structure may turn out to be very different.
Important factors are human impacts, climate and the internal balance of the ecosystem.
Studies of growth and feeding potential of natural populations and single species under different food availabilities, predator pressures and refuge possibilities are measured under experimental conditions in the laboratory and in situ. Many activities have been carried out during the last 13 years. Several Ph. D., master and graduate students are involved.