Zooplankton and Krill

Ecology and ecophysiology of Antarctic krill and zooplankton

Zooplankton species composition and biomass undergo strong seasonal and regional fluctuations, which are partially determined by physical, chemical and biological factors. Only few plankton species dominate in highly productive areas, or seasons. These species determine the structure of the pelagic food during phases of high productivity, but also mechanisms and rates of bio-geochemical exchange of matter between atmosphere, ocean and sea floor sediments. Within this framework, we investigate such factors which determine the dominance of certain key-species in various projects. The basic concepts are tested by a combined approach of field research, laboratory experiments and mathematical modelling. Our target organisms are copepods, salps and the Antarctic krill, all which can dominate the marine zooplankton.