Predation in marine pelagic ecosystems
Predation is the ultimate evolutionary force that shapes all forms of life, also the smallest plankton of the sea. Food webs are formed as a result of predation and trophic cascades are observed in all places that one investigates. A constantly changing environment and organisms that grow fast and have short generation times create a rapidly changing ecosystem which efficiently use resources.
Controlling factors for this fundamental structure are the focus of my research. I use phytoplankton, ciliates, copepods and jellyfish as targets of my experimental work. I use high-speed video filming, manipulative bottle incubations and stable isotopes to investigate the predator–prey interactions. In the field, I coordinate a 35-year long monitoring programme measuring the production and structure of plankton every 2 weeks at three stations in the Gullmar Fjord.