Predation in marine pelagic ecosystems
Predation is the ultimate evolutionary force that shapes all forms of life, also the smallest plankton in 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, nanoflagellates, ciliates and copepods in bottle incubations to investigate the predator–prey interactions. In the field, I coordinate a 37-year long monitoring programme measuring the production and structure of plankton every 2 weeks at three stations in the Gullmar Fjord.
- Long-term monitoring of primary production and plankton in the Gullmar Fjord
- Trophic cascades in coastal zooplankton communities
- Trophic interactions among microzooplankton
- Baltic Zooplankton cascades, BONUS+project 2009-2011
- A new invader in the Baltic Sea—Feeding and ecosystem impact by the ctenophore Mnemiopsis leidyi
- Assessment of community structure and seston quality effects on plankton carbon fluxes at two contrasting coastal sites
- Density dependent grazing rates in a natural microzooplankton community
Peter Tiselius (professor)