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Abstracts - Posters
P28. Multiple roles of a mixotrophic dinoflagellate in the marine food web
Terje Berge 1 , Niels Daugbjerg 2 , Morten Moldrup 1 , Øjvind Moestrup 2 , Sofie B. Mogensen 1 , Louise
K. Poulsen 3 and Per Juel Hansen 1
1
Marine Biological Section, Department of Biology, University of Copenhagen, Copenhagen K,
Denmark tberge@bio.ku.dk
2
Marine Biological Section, Department of Biology, University of Copenhagen, Helsingør,
Denmark
3
DTU Aqua, Technical University of Denmark, Charlottenlund Castle, Charlottenlund, Denmark
Dinoflagellates are important producers and consumers of organic material in the ocean, and several
species are mixotrophic. This means, that in addition to fix inorganic carbon by photosynthesis,
they can take up organic material by feeding phagotrophically on bacteria, phyto- and
microzooplankton. Karlodinium armiger is a mixotrophic dinoflagellate that cannot survive in the
dark, even if fed with plenty of food. It feeds on diverse prey types including heterotrophic and
autotrophic flagellates. The species ingests prey by the use of a feeding tube, which allows the
uptake of prey items several times larger than itself. Here I will present a remarkable range of
suitable prey types for a dinoflagellate and discuss the multiple roles that this mixotroph plays in the
marine food-web.
Program 17. danske havforskermøde, 145